CreationDate stringlengths 23 23 | Answer stringlengths 60 24k | Tags stringlengths 5 68 | Title stringlengths 15 140 | Id stringlengths 1 4 | Body stringlengths 106 19.3k |
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2017-01-04T19:23:14.037 | <p>The Coke Machine, rather amusingly, <a href="https://www.cs.cmu.edu/~coke/">has its own website</a> with a bit more information on its history.</p>
<p>The <a href="https://www.cs.cmu.edu/~coke/history_long.txt"><em>Ancient History</em></a> document explains how the original Coke Machine operated:</p>
<blockquote>
... | |protocols| | What connectivity protocol did the Carnegie Mellon University's Coke Machine use? | 601 | <p>I've been reading over the web about the history of the Internet of Things, and one of the most interesting things I have run across is the Carnegie Mellon University's Coke machine. According to various articles I have read, including <a href="http://ewahome.com/internet-of-things-iot/history-of-internet-of-things... |
2017-01-05T16:57:43.183 | <blockquote>
<p>Is it true that Google will be pushing updates to IoT devices using Android Things without the device developers verifying that it works?</p>
</blockquote>
<p>Yes, for Android Things devices Google plans to push upgrades continuously without any device developers verifying it.</p>
<blockquote>
<p>... | |over-the-air-updates|android-things| | Are Android Things updates going to be delivered automatically? | 635 | <p>I recently found out about <a href="https://developer.android.com/things/index.html" rel="noreferrer">Android Things</a>, Google's platform for developing an IoT device on top of the Android system.</p>
<p>An <a href="https://www.infoq.com/news/2016/12/android-things" rel="noreferrer">InfoQ article</a> suggests tha... |
2017-01-05T17:05:28.790 | <p>One way to debug this would be to run mosquitto manually with the same options as your init system is using, then look at the output. For example:</p>
<pre><code>mosquitto -v -c <path to config file>
</code></pre>
<p>Adding <code>-v</code> will ensure that you have verbose logging, regardless of the config f... | |mqtt|raspberry-pi|mosquitto| | Mosquitto on Raspberry Pi refuses connection after changing log settings | 636 | <p>In my ongoing endeavors to get my Raspberry Pi to command my stuff I set up a Mosquitto MQTT broker. In the base settings everything went reasonably fine.</p>
<p>I could post test messages with the publish command and receive them with the subscribe command. Then I decided to up the log level and modified the mosqu... |
2017-01-05T18:51:56.360 | <p>Nope.</p>
<p>There are currently just two Bluetooth profiles supported.</p>
<blockquote>
<p><strong>Advanced Audio Distribution Profile (A2DP)</strong><br>
This profile allows you to stream audio from your mobile device (such as a phone or tablet) to Echo.</p>
<p><strong>Audio / Video Remote Control Profi... | |amazon-echo|microphones| | Is it possible to use Amazon Echo as a normal bluetooth microphone for a PC? | 639 | <p>Amazon Echo contains multiple good microphones. Is it possible to link them to my PC so that I can use the microphone with software like Skype?</p>
|
2017-01-06T14:06:02.293 | <p>I am glad that you got other answers, because NFC is probably the wrong technology for this. </p>
<p>Your phone <strong><em>reads</em></strong> NFC tags and acts upon them; no request <strong><em>to</em></strong> the ‘phone, and no to and fro communication. </p>
<p>So, at best, you could tag the device – with a UR... | |communication|wifi|nfc| | How can I easily configure Wi-Fi on a smart device without a screen? | 651 | <p>I'm making an IoT device that will serve a web app over WiFi which can be accessed to control it.</p>
<p>I would like to make it easy to set up. For example, the easiest way I can imagine is as follows; all it would need is a phone or similar with NFC capabilities. (Only hypothetically, because this assumes NFC etc... |
2017-01-06T21:01:27.100 | <p>If your 5W charger can handle the demands, it will use three watts more than the spec of 2W for the cam you linked to. Every two weeks, those three extra watts will use one kilowatt-hour, which I'll guess costs you fifteen cents, or about four (US) dollars annually. A bit of Google-fu found the D-Link DCS-932L deliv... | |power-consumption|digital-cameras|microprocessors| | Will reusing a mobile phone as a smart webcam be cheaper than buying a dedicated webcam? | 664 | <p>With <a href="https://getperch.com/" rel="nofollow noreferrer">Perch</a>, it seems that you can use an old Android smartphone with a camera as a webcam, which seems like a great idea to reuse old devices that you no longer want.</p>
<p>However, in normal usage, phones tend to use a <em>lot</em> of energy in my expe... |
2017-01-07T18:37:48.760 | <p>Alright, I guess I can't comment but I can write a separate answer.</p>
<p>I looked a bit into the answer by Bence and summarized some more details below.</p>
<p>Current links since his are out of date now:</p>
<p><a href="https://help.ouraring.com/sleep/validity-of-the-oura-ring-in-determining-sleep-quantity-and... | |sensors|heart-rate-monitors|oura-ring| | Does the Ōura ring measure heart rate well enough to assess HRV? | 678 | <p>The wrist-worn devices generally don't measure the heart rate precisely enough to measure heart rate variability (HRV). Does the <a href="https://ouraring.com/why-ring/" rel="noreferrer">Ōura ring</a> measure heart rate precisely enough to get quality HRV data?</p>
|
2017-01-07T20:01:52.837 | <p>I have a D-Link 5020-L IP Camera.</p>
<p>Even without D-Link's soft, the messages are transmitted via plain HTTP and a basic autorization header. Which means that if somebody sniffs my home network they can easily get my login/password. And yes, if my router has opened ports my login/password is base64 encoded in t... | |security|dlink| | Which D-Link IP cameras are affected by the FTC complaint, and what can I do about them? | 684 | <p>The FTC have <a href="https://www.ftc.gov/system/files/documents/cases/170105_d-link_complaint_and_exhibits.pdf">filed a legal complaint against D-Link</a> alleging that their routers and IP cameras have critical security vulnerabilities and are misleading consumers into believing they are safe.</p>
<blockquote>
... |
2017-01-08T06:41:00.943 | <p>Generally you'd need some component to trigger and power the sensor and read the response. That sensor has a custom response and trigger which makes me doubt there is a standard ZigBee module out there which converts a command to that 10 µs trigger and reports back the response in verbatim. Thus, you'll need some so... | |raspberry-pi|sensors|zigbee| | Connecting a sensor to ZigBee | 686 | <p>I am planning to measure water level in a well, which is about 10 m deep with maximum water level up to 5 m. My plan is to use ultrasonic sensor <a href="http://www.micropik.com/PDF/HCSR04.pdf" rel="noreferrer">HC SR04</a> to measure depth, transmit it via ZigBee to a Raspberry Pi inside my home.</p>
<p>My question... |
2017-01-08T08:17:53.077 | <blockquote>
<p>I would like to monitor clients connecting and disconnecting from a separate process that would be subscribing to a system topic where birth and will messages are posted. </p>
</blockquote>
<p><a href="http://emqtt.io/docs/v2/guide.html#sys-topics">emqtt's User Guide</a> shows a system topic that off... | |mqtt|emq| | Subscribing to MQTT birth and will topics? (emqttd) | 688 | <p>I am running emqttd (<a href="http://emqtt.io/" rel="noreferrer">emqtt.io</a>). I would like to monitor clients connecting and disconnecting from a separate process that would be subscribing to a system topic where birth and will messages are posted. What is the right way to do that?</p>
|
2017-01-08T13:43:13.900 | <p>There's a built in feature in Alexa to prevent exactly this. Go to your app, click settings, alexa account, and then recognized voices.</p>
<p>Select "your Voice" and follow the prompts.</p>
<p>Hey presto. As you need more people to be able to order things, add their voices as well.</p>
<p>Here's what a qu... | |security|alexa|amazon-echo| | How can I stop Alexa from ordering things if it hears a voice on TV? | 695 | <p><a href="http://www.theregister.co.uk/2017/01/07/tv_anchor_says_alexa_buy_me_a_dollhouse_and_she_does/?mt=1483795705927" rel="noreferrer">According to The Register</a>, lots of Amazon Echo devices were accidentally triggered by a presenter saying <em>'Alexa ordered me a dollhouse'</em>.</p>
<blockquote>
<p>Telly sta... |
2017-01-08T16:54:53.897 | <p><strong>Without Cortana</strong></p>
<ol>
<li><p>By using the Xbox button on your controller if your controller is paired to your Xbox One.</p></li>
<li><p>By using the official Windows 10 Microsoft Xbox app. To make this work, you have to connect your Xbox One to the Windows 10 app by following <a href="https://i.... | |microsoft-windows|wake-on-lan|microsoft-xbox|cortana| | How to turn on Xbox One from Windows 10 PC using Cortana? | 703 | <p><a href="https://www.microsoft.com/en-us/windows/cortana" rel="nofollow noreferrer">Cortana</a> is Microsoft's intelligent personal assistant for Windows Phone 8.1, Microsoft Band, and Windows 10.</p>
<p>I am interested in how can someone turn on their Xbox One by using Cortana voice command. Unfortunately when I w... |
2017-01-09T17:47:55.470 | <p>Not directly.</p>
<p>You could use an authentication plugin such as <a href="https://github.com/jpmens/mosquitto-auth-plug" rel="noreferrer">mosquitto-auth-plug</a> to dynamically add users to a banned list and then force a disconnection by connecting with a duplicate client id.</p>
| |mqtt|mosquitto| | Can a Mosquitto MQTT client forcibly disconnect another? | 726 | <p>I've been wondering how an MQTT client could instruct the broker to disconnect a client by some means, in case I need to force-disconnect a client from my MQTT server (for example, if it's misbehaving somehow and not responding correctly).</p>
<p>A <a href="https://iot.stackexchange.com/questions/504/what-will-be-t... |
2017-01-10T17:48:30.683 | <blockquote>
<p>Is there any technical reason for restricting wake word customization</p>
</blockquote>
<p>When assistant device is not in use, the application processor (I think ARM in case of Alexa as well as Google Home) is suspended and taken to lowest possible power state. The wake word detection is left to ver... | |smart-home|smart-assistants| | Why do most smart assistants offer little, if any, customisation of the wake word? | 736 | <p>The majority of <em>smart assistant</em> brands, such as the Amazon Echo and Google Home, offer very little in the way of customisation for the wake word (the phrase you use to wake up the device so it listens to you).</p>
<p>For example, <a href="https://iot.stackexchange.com/questions/524/how-to-change-the-amazon... |
2017-01-12T12:41:17.787 | <p>One reason would be for a large house. We have 3 Alex devices, in the Master bedroom, Living Room and Lounge.</p>
<ul>
<li>You can now sort of link a device to a room, but its still wishy washy.</li>
<li>Sometimes we listen to news or music on the device itself, with a few of us around, its convenient to listen to ... | |alexa|amazon-echo| | Why would I need multiple Alexa devices in one home? | 758 | <p>As a result of this <a href="https://iot.stackexchange.com/questions/695/how-can-i-stop-alexa-from-ordering-things-if-it-hears-a-voice-on-tv">question</a> I have read some articles about Alexa and its wake-words. One of the <a href="http://www.howtogeek.com/249342/how-to-change-the-amazon-echos-wake-word/" rel="nofo... |
2017-01-12T20:32:47.543 | <p>Yes. IoT devices (e.g. wifi thermostat) with no open/listening ports, such as telnet or http, usually dial into a central server, and stay connected to that server 24/7. When you are abroad, the thermostat app on your smartphone contacts the same CENTRALIZED server when you want to change the temperature, and that s... | |security|networking|blockchains| | Could a blockchain really prevent malware in the Internet of Things? | 764 | <p><a href="https://www.rtinsights.com/blockchain-technology-and-iot-security/" rel="noreferrer">This article</a> claims that using a blockchain-based security system for an IoT network would prevent some types of attacks:</p>
<blockquote>
<p>Blockchain technology may help offer an answer. Gada observes that blockchain... |
2017-01-13T19:58:33.807 | <p>Messages are persisted to disk not just held in memory.</p>
<p>Look at the <code>autosave_interval</code> and <code>autosave_on_change</code> options for when the messages get written to disk.</p>
<p><sub><a href="https://mosquitto.org/man/mosquitto-conf-5.html">Source</a></sub></p>
| |mqtt|mosquitto| | What happens if Mosquitto runs out of memory to store QoS 1/2 messages? | 784 | <p>In MQTT, messages with QoS 1 or 2 <a href="http://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels"><em>must</em> be delivered at least once</a> (QoS 2 messages must be delivered <em>exactly</em> once). If the client is not connected, the broker must store the message until the client is rea... |
2017-01-13T21:01:56.710 | <blockquote>
<p>So how does EMQ persist QoS 1/2 messages until delivery, i.e. a reboot of the broker or with respect to memory limits?</p>
</blockquote>
<p>The answer seems to be: <strong>it doesn't</strong>. <a href="https://github.com/emqtt/emqttd/issues/827" rel="noreferrer">This issue</a> on their bug tracker sa... | |mqtt|emq| | How does EMQ persist QoS 1/2 messages? | 786 | <p>The <a href="http://emqtt.io/docs/v2/index.html" rel="noreferrer">EMQ (Erlang MQTT Broker)</a> is a "distributed, massively scalable, highly extensible MQTT message broker" with a reported "1.3 million concurrent MQTT connections" - so it potentially allows a large number of clients to publish and subscribe to it. I... |
2017-01-14T10:06:26.940 | <p>There are two ways that you can achieve this unless the devices you have in-home are configured to access an external server specifically to provide this function (most are).</p>
<p><strong>A VPN</strong> can be used to logically move your android device to inside your home network. It is possible (but unlikely) th... | |smart-home|wifi| | Connect to device at home network remotely | 787 | <p>I am trying to figure out if it is possible in any way for me to remotely connect to a device on my home network, but remotely.</p>
<p>Scenario:</p>
<p>My entertainment system is connected to the home network, and every now and then when I'm at work (50 km away) I would like to activate it (usually because family ... |
2017-01-14T16:56:11.190 | <p>There are two obvious points of entry for an attacker. One is the local network connection, the other is the WAN. Even if you defend against these, you need to ensure that there is nothing valuable which is known to the device since it provides an easy attack point for other devices.</p>
<p>A wired connection for t... | |smart-home|security| | What can I do if a smart DVR camera only supports default passwords? | 796 | <p>An awful lot of devices on the market for home automation have severe security flaws, such as hard-coded passwords (or no passwords at all!). To make it worse, it's hard to find information on the Internet about a device's security before purchasing, so it's easy to buy something only to find out that it's blatantly... |
2017-01-15T14:02:48.947 | <p><a href="http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html" rel="noreferrer">Version 3.1 of the spec</a> suggested some unreasonably low username/password lengths:</p>
<blockquote>
<p>It is recommended that user names are kept to 12 characters or fewer, but it is not required.</p>
<p>It is rec... | |security|mqtt| | Why does this whitepaper say MQTT usernames/passwords "do not provide enough entropy"? | 804 | <p><a href="https://lists.oasis-open.org/archives/amqp/201202/msg00086/StormMQ_WhitePaper_-_A_Comparison_of_AMQP_and_MQTT.pdf" rel="nofollow noreferrer">This whitepaper</a> comparing MQTT and AMQP says that MQTT's username/password restrictions make it far less secure than AMQP:</p>
<blockquote>
<p>MQTT requires sho... |
2017-01-16T16:12:12.623 | <p>For near-real time tracking of vehicles while out of cellular service range, Spot makes the <a href="https://www.findmespot.com/en/index.php?cid=128" rel="noreferrer">Spot Trace</a>, a vehicle tracker that uses satellite communication. It transmits only when the vehicle has moved or is in motion, and only as often ... | |raspberry-pi|gps| | Robust GPS + Internet - Best option? | 812 | <p><strong><em>Please consider the following:</em></strong></p>
<p>I am looking to build a device that will be placed in a vehicle as it drives through heavy wooded areas, potentially far away from any mobile reception towers.</p>
<p>The hope is for this device to be able to get its GPS location in near real time, an... |
2017-01-16T17:38:27.927 | <p>One of the answers above says that CoAP uses UDP and hence does not guarantee data delivery. This is not completely true. CoAP has a non-confirmed mode and a confirmed mode of sending messages.
In confirmed mode, CoAP will do retries to try to ensure delivery. You can tune the timeout and retry attempt count.
The no... | |mqtt|communication|protocols|coap| | Does CoAP have a lower footprint than MQTT? | 813 | <p>I recently read a <a href="https://www.quora.com/Which-is-more-lightweight-as-IoT-protocol-MQTT-or-CoAP">Quora question</a> about whether CoAP or MQTT is more lightweight, but the answers don't seem particularly satisfying and all contradict each other: the top answer says MQTT takes fewer resources, and another bel... |
2017-01-17T16:23:38.377 | <p>Alternatively it might be worth to consider <a href="https://en.wikipedia.org/wiki/WirelessHART" rel="nofollow noreferrer">wireless Hart (Highway Addressable Remote Transducer)</a>. This is a 2.4GHz ( license free frequency band) Smart mesh networking technology that uses 802.15.4 standard. WHart use direct-sequence... | |networking|communication|bluetooth| | Is Bluetooth 3.0 suitable for a single-master multiple-slave network? | 819 | <p>I have a data logger board with a <a href="http://simcom.ee/modules/gsm-gprs-gnss/sim808/" rel="noreferrer">SIM808</a> on it. It has Bluetooth 3.0 capability by the SIM808. The board itself implements a battery management system, capable of performing weight, humidity and temperature measurements and also can detect... |
2017-01-17T20:29:45.223 | <p>I don't have SmartThings, but do have Google, so here is half an answer.</p>
<p>Comments above <a href="https://community.smartthings.com/t/backup-settings-and-restore-in-smartapps/16182" rel="nofollow noreferrer">from me</a> and <a href="https://community.smartthings.com/t/backup-settings-devices/48296" rel="nofol... | |samsung-smartthings|data-portability| | Can I backup/export settings from SmartThings? | 822 | <p>I was wondering if SmartThings supports backing up the settings (or perhaps exporting it in a machine-readable format such as JSON or XML), so that if worst comes to worst, I won't lose my settings and configuration.</p>
<p>I read <a href="https://community.smartthings.com/t/backup-settings-devices/48296">this thre... |
2017-01-18T15:35:33.407 | <p>When mixing the advert's audio, they simply remove some frequencies. This means that Alexa won't be triggered as it will not register it as a voice command, but viewers can still make out what they are saying in the advert.</p>
<p>You'll also probably notice that when the command is spoken in the adverts, it sounds... | |amazon-echo| | Why doesn't the Amazon Echo respond to advertisements or reports about Alexa? | 828 | <p>I previously asked about <a href="https://iot.stackexchange.com/questions/695/how-can-i-stop-alexa-from-ordering-things-if-it-hears-a-voice-on-tv">what you can do if Alexa <strong>is</strong> triggered by a television programme</a>, but recently I realised something strange: The Echo <strong>does not</strong> respon... |
2017-01-19T06:19:17.623 | <p>Basically what you need to do is merge together the MQTT subscriber code with a ZeroMQ sender in Java, such that when you receive a message from the MQTT queue, it gets transferred to the 0MQ for 0MQ listeners to receive.</p>
<p>I haven't used MQTT from Java, but a popular library seems to be <a href="https://stack... | |mqtt|zeromq| | How can we get messages from an MQTT broker and put them into the ZeroMQ queue? | 832 | <p>I am trying to get messages from an MQTT broker and insert that messages into ZeroMQ. What do I need to do to connect an MQTT broker to <a href="http://zeromq.org/" rel="noreferrer">ZeroMQ</a> in java?</p>
|
2017-01-19T09:16:19.267 | <p>You are correct the, DSP is a separate processor within the CSR8675. It has its on program and data memory.</p>
<p>All image are taken from the linked datasheet.</p>
<p><a href="https://i.stack.imgur.com/2FmlK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2FmlK.png" alt="block picture around t... | |microcontrollers|audio-dsp|csr-adk| | What is the difference between MCU, VM, firmware and Kalimba DSP in the CSR8675 chip? | 834 | <p>This question is about understanding the internal workings of the CSR8675 Bluetooth audio chip </p>
<p>These four terms keep popping up while working with the CSR8670/8675 chip </p>
<ol>
<li>VM (Virtual machine) </li>
<li>Firmware </li>
<li>MCU (Microcontroller Unit)</li>
<li>Kalimba DSP </li>
</ol>
<p>Could... |
2017-01-19T18:30:40.620 | <p>I use Alexa, it does recognizes voices. Also, my Alexas are not placed that close to the door. I also have double glazing. So, you would have to shout really really loud, it will probably need a loud speaker.</p>
<p>On the other hand, in modern houses, ingress is hardly an issue, just break any of the glass panes... | |samsung-smartthings|google-home| | How can I securely support unlocking my door through Google Home? | 838 | <p>There are several brands of <a href="https://www.smartthings.com/works-with-smartthings/locks">door locks supported by SmartThings</a>, all of which could be used to secure someone's front door. After some research, I found it was possible to <a href="https://community.smartthings.com/t/google-home-door-locks/62423"... |
2017-01-19T21:18:26.360 | <p>It's been nearly 7 years since I asked this question, and a web search in 2024 still shows no relevant results. I'm going to answer this as "no, there have been no real-world deployments of HomeWSN."</p>
| |smart-home|mqtt| | Any real-world HomeWSN deployments? | 840 | <p>I searched for "MQTT Rules Engine", and came across the <a href="http://homewsn.com/" rel="noreferrer">HomeWSN</a> project. It looks like it's almost trying to be a home automation system based on MQTT messaging, which could be very useful. Has anyone deployed a real system based on this tool?</p>
|
2017-01-20T16:48:58.753 | <p>I found a slight variation of the above steps to work:</p>
<ol>
<li>Unplug for 10 seconds</li>
<li>Plug back in and immediately tap mute once (the microphone will turn red)</li>
</ol>
<p>Your unit will then immediately update. Takes about half an hour to complete. </p>
| |amazon-echo| | How do I force my Amazon Echo to update to the latest version? | 845 | <p>Version 4812 of the Echo software <a href="https://www.reddit.com/r/amazonecho/comments/5nrxk7/german_amazon_website_confirms_wakeword_computer/" rel="noreferrer">apparently includes the new 'Computer' wake word</a>, which seems really exciting. However, my device is still running version 4540 and hence doesn't have... |
2017-01-20T18:08:38.477 | <p>The bulk of your power will likely be expended on RF transmission, not CPU cycles spent in encryption routines. Every additional bit transmitted will cost you more power than the encryption you're proposing. That means if you take a naive approach, like using AES in CBC mode, you risk increasing the message size t... | |sensors|microcontrollers|power-consumption|product-design| | What is the power implication of encrypting my sensor traffic? | 847 | <p>Considering a typical type of application, a battery powered sensor taking readings (32 bit value) every 10 minutes, what is the likely impact on battery life if I choose a simple un-encrypted on-air protocol, compared with an encrypted transmission?</p>
<p>Assume that my data isn't particularly secret, but accordi... |
2017-01-21T11:15:22.370 | <p><a href="https://github.com/alexa-pi/AlexaPi" rel="noreferrer">This open source Raspberry PI Alexa client</a> has support for free wake words made as easily from PI's terminal as:</p>
<pre><code>sudo systemctl stop AlexaPi.service
sudo nano /etc/opt/AlexaPi/config.yaml
change line:
phrase: "alexa"
</code></pre>
<... | |alexa|amazon-echo|hardware| | How can I detect Alexa's current state or change its current state with an external device? | 853 | <p>I want to have custom wake-word for Alexa so I want to interface this <a href="http://rads.stackoverflow.com/amzn/click/B00X4WHP5E" rel="noreferrer">Amazon Echo</a> with an external device. I am wondering if it is possible to create a proxy device that would wake up Alexa if I give voice command to the proxy device.... |
2017-01-21T16:41:13.983 | <p>I just recently discovered this issue while upgrading my SmartThings Hub to a newer model.</p>
<p>It appears that newly added Hubs to your account <strong>do not</strong> have Insecure Rejoin enabled, but my older model did have this feature enabled. So, perhaps Samsung has updated their systems to protect the user... | |security|samsung-smartthings| | Is "Insecure Rejoin" still enabled by default for Samsung SmartThings hubs? | 854 | <p><a href="https://www.blackhat.com/docs/us-15/materials/us-15-Zillner-ZigBee-Exploited-The-Good-The-Bad-And-The-Ugly-wp.pdf" rel="noreferrer">According to Cognosec</a>, there is a critical vulnerability with ZigBee (one of the protocols supported by the SmartThings hub) which allows attackers to gain access to a ZigB... |
2017-01-22T11:47:41.517 | <p>Hue Restore App might help you.</p>
<p><a href="https://play.google.com/store/apps/details?id=com.rrapps.huerestore&utm_source=stackoverflow_iot" rel="nofollow noreferrer">Hue Restore</a>- Hue Restore let you save and restore all Philips Hue lights in your home with single tap. You can do this right from home s... | |philips-hue|ac-power| | How can I stop my Philips Hue bulbs resetting to full brightness after a power cut? | 857 | <p>According to <a href="https://www.reddit.com/r/Hue/comments/42btfz/any_way_to_default_to_off_after_power_outage/czaz2y2/">this comment on Reddit</a>, Philips Hue bulbs reset to 100% brightness after any power interruption (e.g. a power cut, switching the physical light switch off then on, etc).</p>
<p>This does see... |
2017-01-23T16:20:37.817 | <p>The direct answer is no.</p>
<p>Workaround 1: hardware interrupt that can be activated via app across a battery of devices; difficulty level: hard.</p>
<p>Workaround 2: Since you can change the wake word of any echo device via the app and android phones have a variety of batch (tap macro) apps available, hypothetica... | |amazon-echo|alexa| | Can I ask Alexa to turn off its microphone by voice command? | 861 | <p>Is it possible to <a href="https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/overviews/steps-to-build-a-custom-skill" rel="noreferrer">build a custom skill</a> that would be equivalent to pressing the microphone on/off button on the top of the Amazon Echo?</p>
<p>I know from <a href="http://www.h... |
2017-01-24T14:36:42.547 | <p>In 2024, many heatpumps are C-Bus compatible. In my main home. I am using a C-Bus adapter that has rest calls. I found a handler and paid for it, so I didn't have to write the interface code for it.</p>
<p>For my parents-in-law's house, I installed an <a href="https://aeotec.com/products/aeoteo-heavy-duty-switch/"... | |smart-home|smart-plugs|tp-link| | Can I use a smart plug with an air conditioning unit? | 865 | <p>I am hoping to be able to use a smart plug with my window air conditioner. I currently use the TP Link <a href="http://uk.tp-link.com/products/details/cat-5258_HS100.html" rel="noreferrer">HS 100</a> plugs around my home, but I am unsure if they could handle the amount of power an air conditioner uses. Any suggestio... |
2017-01-24T16:25:26.613 | <p>You can use skills such as the <a href="https://rads.stackoverflow.com/amzn/click/com/B0716PNRXY" rel="nofollow noreferrer" rel="nofollow noreferrer">My Reader</a> skill, which can read any text you send to it through its servers.</p>
<p>Once you have set it up, the steps are as follows.</p>
<blockquote>
<p><str... | |smart-home|amazon-echo|alexa| | How to read custom documents by Alexa? | 866 | <p>According to <a href="https://www.amazon.com/gp/help/customer/display.html?nodeId=201975870" rel="nofollow noreferrer">Amazon</a>, Alexa can read certain Kindle books.</p>
<blockquote>
<p>Alexa reads Kindle books eligible for Text-to-Speech (an experimental reading technology that allows supported Amazon devices ... |
2017-01-24T18:20:42.910 | <p>Rather a lot of personal information is collected, according to the <a href="http://shealth.samsung.com/policy" rel="noreferrer">Privacy Policy</a>. Here are some of the more sensitive pieces of information collected:</p>
<h3>When not logged in</h3>
<ul>
<li>Birth year</li>
<li>Gender</li>
<li>Height, weight and a... | |privacy|wearables| | Are Samsung's "S Health" devices storing health data in the cloud? | 868 | <p>Samsung wearables like the Gear watches can run the Android app <a href="https://play.google.com/store/apps/details?id=com.sec.android.app.shealth" rel="noreferrer">S Health</a> are advertised to be quite secure and can be run by using the Samsung Knox security feature which is in itself advertised as certified by g... |
2017-01-24T18:21:10.427 | <blockquote>
<p>If I ever wanted to sell the Echo, it'd be useful to know what information is on the device, so that I can try to remove it.</p>
</blockquote>
<p>I think one good option is to deregister the echo device from you Amazon account as <a href="https://www.youtube.com/watch?v=CbwvsU8HnrY" rel="nofollow nor... | |amazon-echo|privacy| | What personal information is stored on my Amazon Echo? | 869 | <p>As far as I can tell, <em>most</em> data from the Amazon Echo (e.g. recordings of my commands) are stored in the cloud, according to the <a href="https://www.amazon.com/gp/help/customer/display.html?nodeId=201602230" rel="nofollow noreferrer">Alexa FAQ</a>. However, I couldn't find any authoritative information abou... |
2017-01-25T14:55:01.570 | <p>Have to start out by saying, this will have to take place on the router. I looked into the camera, but it simply seems to be too manufacturer set to be able to run a crack that complex on. Perhaps if you did some firmware replacement you could manage, but not simply.</p>
<p>With your particular router, it appears... | |smart-home|security|privacy|digital-cameras|whitelisting| | How can I set up IP whitelisting on an IP camera without support for whitelists? | 873 | <p>The camera in question is a <a href="http://rads.stackoverflow.com/amzn/click/B01C6DXMX0" rel="nofollow noreferrer">Ring Stick Up Cam</a>. I want to add an additional layer of security and prevent anyone from peeking (listening) into my home.</p>
<p>I thought that it might be good if I could set up some kind of IP ... |
2017-01-25T18:31:33.000 | <p>According to the FitBit community, the GPS is only enabled when you have turned on a tracking activity, example, walking, hiking, biking, etc. From the <a href="https://community.fitbit.com/t5/Surge/How-do-I-turn-off-the-GPS-on-my-Surge/td-p/940377" rel="nofollow noreferrer">Fitbit Community</a>:</p>
<blockquote>
... | |privacy|gps|fitbit| | How do I stop the Fitbit Surge from storing GPS data? | 875 | <p>I was reading about the privacy of Fitbit devices, and <a href="http://www.huffingtonpost.com/mark-weinstein/what-your-fitbit-doesnt-w_b_8851664.html" rel="noreferrer">this Huffington Post article</a> has a rather concerning point with regard to GPS-enabled fitness trackers:</p>
<blockquote>
<p>In certain cases, ... |
2017-01-26T13:46:04.517 | <p>Looking at ease of programming and low cost, I would probably start with some kind of Arduino module (or low-cost clone). Code for your ultrasonic sensor already exists, as does example code for ZigBee, for example using the Digi XBee modules. On the latter, you connect the XBee to a serial port, and after making th... | |microcontrollers|hardware|zigbee| | Selecting a microcontroller for a battery operated data collection project | 880 | <p>I am planning to measure water level in a well, which is about 10 m deep with maximum water level up to 5 m. My plan is to use ultrasonic sensor <a href="http://www.micropik.com/PDF/HCSR04.pdf" rel="noreferrer">HC SR04</a> to measure depth, transmit it via ZigBee to a Raspberry Pi inside my home.</p>
<p>As discuss... |
2017-01-26T17:27:47.000 | <p>As time has passed on, I think the answer to this question now needs to be:</p>
<p><strong>Yes, Alexa can speak without being prompted. Specifically, she can utter anything you want her to!</strong></p>
<p>The convenient tool you can use is a shell script named <a href="https://github.com/thorsten-gehrig/alexa-rem... | |alexa| | Can Alexa ever speak without being prompted? | 882 | <p>I was recently asked if Alexa can ever speak without prompting, so I thought it'd be helpful to ask here to make sure I'm right; as far as I know, Alexa will <em>never, ever</em> speak without the wake word, and the only unprompted sound it will make is the alarm sound.</p>
<p><a href="https://techcrunch.com/2016/0... |
2017-01-26T21:11:48.920 | <p>Many vendors have bad security practices and ship <em>all</em> their devices with an <strong><em>identical</strong> default password</em> (which is easier than programming and labeling each device with a unique password or mandating a password change before it can be used).<br>
When such devices are accessible onlin... | |security| | Should I use a different password on each IoT device? | 885 | <p>According to <a href="http://www.cmswire.com/cms/internet-of-things/top-5-internet-of-things-security-concerns-026043.php" rel="noreferrer">cmswire.com</a>, one of the major security risks with the Internet of Things is Insufficient Authentication/Authorization. When it comes to the Internet of Things, should I use... |
2017-01-27T10:47:01.973 | <p>Creating a startup is not about what you can do with the technology and not even about the product. For a successful startup that can captivate VC's you should first think about the market that you are going to serve. But thinking about the market you will serve is not enough. You need to have real data about the ma... | |microcontrollers|hardware| | Which microcontroller and programming language should I use for an Internet-enabled weather display? | 891 | <p>I am a newbie in IoT and want to start my career in IoT. As I search on Google for startups in IoT, I found many blogs. And I found the languages used in IoT like C#, Java, Node.js, and the microcontrollers like Arduino, Raspberry Pi, Intel, Netduino, etc.</p>
<p>As I am new to IoT I don't know which language is be... |
2017-01-27T13:45:02.467 | <p>There are two reasons. </p>
<p>(1) <strong>First is simpler, end-to-end connectivity</strong>. If both source and destination have public IPv4 (or IPv6, of course) address, they can connect to each other in any direction anytime.</p>
<p>Your IoT with private IP <code>192.168.0.52</code> however can use <a href="ht... | |ip-address| | Why would IPv6 be necessary for the IoT? | 894 | <p>I recently ran across this quote from <a href="https://securityintelligence.com/the-importance-of-ipv6-and-the-internet-of-things/" rel="noreferrer">Security Intelligence</a> about the Internet of things and IPv6:</p>
<blockquote>
<p>Analysts predict that there will be 30 billion connected “things” by 2020, yet the ... |
2017-01-27T21:22:28.993 | <p>No, the connection will still be encrypted, but the services that depend on it like WPS (Wireless Protected Setup) won't work. WPS is a simple way to setup the WIFI connection by pressing a button in the router after setting the connecting device into WPS mode, but when the SSID is not being broadcasted the device c... | |security|networking|routers| | Will disabling my network's SSID broadcast cause my WPA encryption to be disabled? | 902 | <p>I encountered this message when I tried to disable the SSID broadcast of my home network. Does this mean that my router's Wi-Fi connection will no longer be encrypted? </p>
<p><a href="https://i.stack.imgur.com/18Nar.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/18Nar.png" alt="Screenshot"></a>... |
2017-01-28T17:11:01.023 | <p>Great question! As has been remarked in the comments, this sounds mostly like a news report rant that hasn't really researched completely. All the articles out there say essentially the same thing: no new research has been done to confirm suspicions, and all articles find their source (eventually) in a <a href="ht... | |privacy|nest-cam| | Is the Nest Cam recording even when "switched off"? | 906 | <p><a href="http://www.theregister.co.uk/2015/11/25/nest_cam_doesnt_spy/" rel="noreferrer">The Register</a> have published an article suggesting that the Nest Cam could be recording even when told to switch off:</p>
<blockquote>
<p>Alphabet-owned Nest says there is no truth to the allegation that its internet-connected... |
2017-01-30T13:16:41.260 | <p>Mirai's source code <a href="https://krebsonsecurity.com/2016/10/source-code-for-iot-botnet-mirai-released/" rel="noreferrer">has been released in public</a>, and <a href="https://github.com/jgamblin" rel="noreferrer">Jerry Gamblin</a> has kindly <a href="https://github.com/jgamblin/Mirai-Source-Code" rel="noreferre... | |security|privacy|mirai| | Will changing my user name and password block Mirai attacks? | 911 | <p>I've recently been reading about <a href="https://www.incapsula.com/blog/malware-analysis-mirai-ddos-botnet.html" rel="noreferrer">Mirai</a>, malware whose source has been revealed which is designed to infect IoT devices. It is appears to be a serious threat to security compromised Internet of Things devices. Acc... |
2017-01-30T20:22:25.757 | <p>It seems like that is what Amazon intended. Since you are being credited for the purchase of the device, it is no loss to you and only to Amazon and the Earth itself (waste and whatnot)</p>
<p>However, there is a new model coming out on Friday, February 3 which will last twice as long as the original.</p>
| |batteries|amazon-iot-button| | What can I do when the AWS IoT Button runs out of charge? | 918 | <p>The <a href="https://aws.amazon.com/iotbutton/" rel="nofollow noreferrer">AWS IoT Button</a> (<a href="https://rads.stackoverflow.com/amzn/click/com/B01C7WE5WM" rel="nofollow noreferrer" rel="nofollow noreferrer">Amazon link</a>) is intriguing, but I saw something quite concerning in <a href="https://aws.amazon.com/... |
2017-02-01T15:01:37.127 | <p>If you are sure about using ARM then you could have a look at <a href="http://www.keil.com/support/man/docs/rlarm/rlarm_tn_poll_drv.htm" rel="nofollow noreferrer">Keil's Ethernet Drivers for ARM</a>. It is quite promising.</p>
<blockquote>
<p>RL-TCPnet includes several Ethernet Network drivers. These are
locate... | |networking|arm|drivers|ethernet| | What is a good reference for Ethernet Driver without an OS? | 924 | <p>Soon I will be working on an Ethernet implementation for a bare metal (no OS) capability on an ARM-based processor. I am somewhat familiar with the Ethernet driver model in the Linux Device Drivers book, but I'm wondering if there is a reference for implementing an Ethernet driver for a SoC run with a custom softwa... |
2017-02-01T18:42:28.917 | <p>If Internet connection is lost, BUT electricity is still on AND hub has battery working ok you may have chances to succeed. Since ZigBee connection is there you may have connection between hub and bulb.</p>
<p>ZigBee is a technology for quite short distances, so if all works ok and then for example LAN can be used ... | |networking|samsung-smartthings|philips-hue| | Can I control Philips Hue lights locally using Samsung SmartThings? | 927 | <p>SmartThings v2 Hubs <a href="https://support.smartthings.com/hc/en-gb/articles/209979766-Local-processing#Look" rel="nofollow noreferrer">can process some automations locally</a>:</p>
<blockquote>
<p>Some preconfigured automations can run locally.</p>
<p>Manual, on-demand control of a device or SmartApp through the ... |
2017-02-01T19:01:34.487 | <p>From what I've found, it seems that some implementations (e.g. TI's <a href="http://www.ti.com/tool/z-stack" rel="nofollow noreferrer">Z-STACK</a>) recommend <a href="https://e2e.ti.com/support/wireless_connectivity/zigbee_6lowpan_802-15-4_mac/f/158/p/239001/836732" rel="nofollow noreferrer">refreshing the routing t... | |networking|power-consumption|zigbee| | Automatic link failure detection methods in ZigBee networks | 928 | <p>Given a ZigBee mesh network with several nodes in it. There are established links between each node via router nodes.</p>
<p>If <strong>Node A</strong> wants to send a message to <strong>Node Z</strong> for the first time then <strong>Node A</strong> must perform a Route Discovery to determine which intermediate no... |
2017-02-02T02:46:28.483 | <h2>Option 1</h2>
<p>One solution I have seen and I could recommend is to divide your warehouse in areas and create gateways for accessing to them with the forklift or trucks. Then you setup the antennas on those gateways and force the drives to pass through them in order to track the goods movement.
Basically it is ... | |hardware|rfid| | IoT for industrial warehouse management | 930 | <p>Currently, I am using RFID technology for my warehouse management. My warehouse spans across 4 acres, I need to deploy so many RFID antennas and RFID readers to constantly scan the area for goods movement (active scanning). </p>
<p>What technology is available to help me deploy multiple RFID antennas continuously?<... |
2017-02-02T10:14:15.523 | <p>The ESP8266 was not designed with an Ethernet MAC, but this should not stop you. However, as Sean has said, it imposes a set of pretty severe restrictions on you. </p>
<p>You say that you wish to stay with the ESP8266 platform, but if your project cannot deal with the measly data rates provided by using an ENC28J60... | |ethernet|interfacing|power-sources|esp8266| | ESP8266 with ethernet connection | 932 | <p>I was wondering if someone knows a way to convert a ESP8266 to non-WiFi. I.e. have it connected through Ethernet, preferably with PoE possibility.</p>
<p>Reason for asking: My plan is to have sensors in a locker which is not a wifi-friendly environment. I want to monitor humidity and temperature in particular. I ha... |
2017-02-02T14:01:28.673 | <p>According to OnStar - <a href="https://www.onstar.com/us/en/services/connections/4glte/setup_support.html" rel="noreferrer">Connecting to your vehicle's Wi-Fi Hotspot</a></p>
<blockquote>
<p>To get your hotspot name (SSID) and password, press the Voice Command button and say "Wi-Fi settings."</p>
</blockquote>
| |security|wifi|smart-cars| | Connect to Chevrolet Cruze Hot-Spot Wi-Fi | 938 | <p>The Chevrolet Cruze (2016) is supposed to have a Wi-Fi hot-spot. I do see it showing up in my available network connections, but how do I find the password? From my memory, the dealer didn't say what it was, and if they did, I don't remember what it was.</p>
<p><strong>Is there a way to find my Chevrolet Cruze's ... |
2017-02-02T20:29:47.640 | <p>I use <a href="https://aeotec.com/products/aeotec-multi-sensor-6/" rel="nofollow noreferrer">Aeotec Multi Sensor 6</a>. It has sensors for</p>
<ul>
<li>humidity</li>
<li>lux</li>
<li>temperature</li>
<li>movement</li>
</ul>
<p>It is not meant for outside, but I have two outside (front and back of house) under the e... | |smart-home|sensors|ifttt|connector-services| | Are there any IoT outdoor lighting sensors? | 942 | <p>I have been looking for an ambient light sensor to use with other IoT smart home devices. In my opinion this would be a commonly requested device for controlling internal lighting. For example if you had smart lighting, you may want to turn the lights off if the sun is shining brightly or turn the lights on if it's... |
2017-02-03T12:14:11.477 | <p>As requested in comments, I am posting this as an answer. </p>
<p>I recommend an <a href="http://www.orangepi.org/OrangePi2GIOT/" rel="nofollow noreferrer">Orange Pi 2G IoT</a>. They also have <a href="http://www.orangepi.org/Orange%20Pi%204G-IOT/" rel="nofollow noreferrer">a 4G model</a>.</p>
<p>Here's the 2G ver... | |mobile-data| | Embedded modem options | 943 | <p>I would like to embed a simple mobile modem in my laboratory device. The capability is not really important - I want to be able to send small amounts of data and have no hard requirements on transfer speed or latency. That means that slow data is OK, text message is OK and even manual modulation over a voice line is... |
2017-02-03T17:16:09.860 | <p>Since no one is taking this one on, I'll take a shot at it. :) </p>
<p><strong>Android Google Home App</strong>: <em>If</em> you have the Android Google Home app, <em>then</em> follow <a href="https://support.google.com/googlehome/answer/7071494" rel="nofollow noreferrer">these steps</a>:</p>
<ol>
<li><p>Make su... | |google-home| | How can I report an incorrect response from my Google Home? | 945 | <p>Sometimes, my Google Home gets a little confused and completely misinterprets what I've asked (and it seems other people get the same problem quite often).</p>
<p>For example, the assistant <a href="https://www.reddit.com/r/googlehome/comments/5l3tyo/ok_google_play_everything_wrong_with_deadpool_in/" rel="noreferre... |
2017-02-04T14:47:13.990 | <p>Remember, you are <strong>always</strong> processing data at the edge, even if it's not obvious. The choice to sample data at a particular frequency, whether that is 1Hz or 100Khz (particularly with analogue data), is a form of edge processing. Very few scenarios will transmit data at the maximum clock cycle of the ... | |edge-computing|cloud-computing| | Which problems with cloud computing make edge computing useful? | 950 | <p>I recently read an article in The Register, <a href="http://www.theregister.co.uk/2017/02/03/hpe_micro_data_centre_edge_computing_iot/" rel="noreferrer"><em>Don't let cloud slurp all your data. Chew it on the edge, says HPE</em></a>:</p>
<blockquote>
<p>The basic pitch is that HPE's gear can do compute on your sh... |
2017-02-04T20:49:22.473 | <p>I managed to find my mistake. Mistakenly I assumed that the Client ID is a fix field but it is only part of the Payload of the message thus a <strong>length-prefix</strong> is needed. From the <a href="http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718028" rel="nofollow noreferrer">specifi... | |mqtt|mosquitto| | How to modify only the Client ID in an MQTT CONNECT message? | 955 | <p>I am playing around with MQTT CONNECT messages. I have a simple C program which opens a TCP/IP socket towards an Mosquitto broker running on my laptop, sends an MQTT CONNECT message, (normally) receives the 4 byte long CONNACK reply then closes the socket and exits the program.</p>
<p>Currently I do not build my ow... |
2017-02-05T11:36:21.817 | <p>I found this a while back but I'm unable to attribute to the original author. Works great for existing logs, but can't 'tail -f' with this solution:</p>
<p><code>sudo cat /var/log/mosquitto/mosquitto.log | grep -v datab|perl -pe 's/(\d+)/localtime($1)/e'</code></p>
<p>Using this on linux, but should work on WSL/c... | |mqtt|mosquitto|microsoft-windows| | How to enable detailed logging of Mosquitto broker on Windows 7? | 956 | <p>I have a previous <a href="https://iot.stackexchange.com/q/955/14">question</a> and to get closer to a solution I want to enable Mosquitto broker logging on Windows 7.</p>
<p>Originally I have started the broker manually as follows:</p>
<pre class="lang-bash prettyprint-override"><code>mosquitto -p 1883 -v
</code><... |
2017-02-05T14:52:41.057 | <p>Technically, different devices will communicate using protocols that are not internet-based, protocols that are proprietary, and tied together with different administration tools.</p>
<p>The reality is, particularly in consumer IoT, that you are witnessing an important battle between vendors that have an interest i... | |smart-home| | Why do I need hubs for some devices when automating my home? | 958 | <p>When you get started with automating your home, you quickly find out that many devices need a hub or bridge to function correctly. For example, the Philips Hue bulbs need a <a href="http://www2.meethue.com/en-us/productdetail/philips-hue-bridge">bridge</a>, August Smart Locks need a <a href="http://august.com/produc... |
2017-02-06T13:02:45.543 | <blockquote>
<p>Use only ASCII characters.</p>
</blockquote>
<p><a href="https://www.rfc-editor.org/rfc/rfc20" rel="nofollow noreferrer">ASCII format for Network Interchange</a> specifies that the ASCII range extends from hexadecimal 0 to 7F, i.e., 128 characters. I think % should be supported but not °.</p>
| |mqtt| | Should I use special characters in MQTT topics? | 966 | <p>I have used MQTT to connect all my ESP8266 units but I have a general question regarding topics. According to <a href="http://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices" rel="noreferrer">www.hivemq.com</a>:</p>
<ul>
<li>"Leading forward slash" <code>/</code> should be avoided.</li>
<li>Sp... |
2017-02-06T23:44:25.123 | <p>The problem was bad contacting between SIM card contact block and the board. The problem was difficult to find because when I touched the terminal for measurement it makes pressure to the board, the contact happens and the problem couldn't be observed.</p>
<p>I made a check list for resolution:</p>
<ul>
<li>Is SIM... | |hardware|mobile-data|gsm| | Receiving "ERROR" message from SIM800C module | 970 | <p>Most of the commands I send to <a href="https://www.elecrow.com/download/SIM800C_Hardware_Design_V1.02.pdf" rel="noreferrer">SIM800C</a> module returns <code>ERROR</code> message to me.</p>
<p><em>For example:</em></p>
<p>If I sent <code>AT+CSQ</code>, it returns an expected response.</p>
<p>One of the basics com... |
2017-02-07T17:18:34.337 | <p>It looks like probably not. I have searched around quite a bit, and I have found a couple pieces of evidence:</p>
<h3>1. The article you referenced.</h3>
<p>If you read the article again, you will see that the Google Home did pick up the signal - and interpreted it as a wake up call. Probably the volume and other ... | |google-home| | Does the Google Home have any protection against TV advertisements triggering it? | 980 | <p>Apparently, <a href="http://www.theverge.com/2017/2/5/14517314/google-home-super-bowl-ad-2017?utm_campaign=theverge&utm_content=chorus&utm_medium=social&utm_source=twitter" rel="noreferrer">lots of Google Home speakers were activated by Google's Super Bowl ad</a>:</p>
<blockquote>
<p>Early during tonight... |
2017-02-08T03:50:01.500 | <p>Although it's not ideal, you could use two IFTTT recipes to allow you to call your phone: one to set the ringtone volume to maximum, and one to actually call the phone. It's a little more involved than I'd like, but since IFTTT offers no chaining of actions, it's the best you'll get.</p>
<p><strong>Recipe 1</strong... | |alexa|amazon-echo|google-assistant| | Alexa or Google Assistant "Find My Phone" integration with Android Device Manager? | 984 | <p>Is there a solution for supporting "find my phone" from either Amazon Alexa or Google Assistant, using the native Android Device Manager? Or does Google even provide a web services API that could be used to develop this?</p>
<p>My Google Home does not (yet) support this, which is a bit surprising, given the integr... |
2017-02-08T17:29:35.180 | <p>You do not want a WiFi antenna on your PCB. If you take this approach, you will need to do some RF layout and submit for type-approval/FCC testing. The beat approach to this sort of problem is to use a WiFi module. Here is a page discussing the <a href="http://hackaday.com/2016/07/28/new-chip-alert-rtl8710-a-cheaper... | |hardware|wifi| | How can I design a simple Internet-connected controller for a sensor/heater? | 988 | <p>I am in the process of creating a simple and cheap Wi-Fi PCB design that can send and receive messages to an app (through a cloud of course). I intend to attach this PCB to a fish tank temperature gauge and a fish tank heating tube.</p>
<p>Basically here are the only forms of communication between the PCB and my ap... |
2017-02-08T18:43:24.330 | <p>This page describes the <a href="http://developers.chirp.io/docs/chirp-technology-overview" rel="nofollow noreferrer">chirp protocol</a>:</p>
<blockquote>
<p>An entire chirp is a sequence of 20 pure tones of 87.2ms each. The
first 2 tones are a common ‘front door’ pair – "hj" – to indicate to a
device that th... | |protocols| | How can Chirp transmit data over sound without getting interference? | 990 | <p>I was recently reading about <a href="https://www.chirp.io/" rel="noreferrer">Chirp</a>, a data-over-audio protocol that sends information through (rather literally) chirping sounds either in audible or ultrasound frequencies.</p>
<p>One of the use cases suggested on the website is for transmitting game data between... |
2017-02-09T10:27:14.883 | <p>If you only want control inside the home sure it is possible.</p>
<p>The problem is if you want to offer control from outside the home things get difficult. Neither the client or the server are likely to have a static IP, there are likely to be firewalls and/or NATs in the way.</p>
<p>It is possible for the user t... | |wifi|system-architecture| | Is it possible to commercially sell a Wi-Fi IoT product that DOESN'T use cloud? | 993 | <p>If I wanted to use my phone to control a simple Wi-Fi connected device that just turns the light on or off, or a simple temperature gauge, why don't I just communicate directly with the device instead of going through a cloud? No data persistence or heavy processing or any other fancy stuff to deal with. </p>
<p>Is... |
2017-02-10T14:24:22.947 | <p>I list microcontrollers up to 30 EUR here. I'll keep looking and update this if I find something interesting. A really good solution would be something below 10 EUR, but I haven't found anything like that.</p>
<ul>
<li>The <a href="https://www.ebay.de/itm/LANTRONIX-XP1001000-05R-XPort/123815535100" rel="nofollow no... | |hardware|microcontrollers|ethernet| | Cheap IoT microcontroller with PoE | 1005 | <p>Can anyone recommend a simple micro-controller with some I/O (<8) that can be powered using PoE, something cheap like Raspberri Pi Zero. The requirements are:</p>
<ul>
<li>Support PoE integrated. No power battery maintenance.</li>
<li>Support TCP/UDP communication</li>
<li>few I/O.</li>
</ul>
<p>The thing is th... |
2017-02-10T16:01:06.320 | <p>You mention “certificates”, but from context, I think you're referring to two different things.</p>
<ul>
<li><p>Your device has a <em>private</em> key, which is unique to this device and not known outside the device. This key identifies your device. Anybody who can access that key can impersonate the device. That m... | |security|mqtt|aws-iot| | Is it a bad practice to keep certificates on external memory? | 1006 | <p>We're working on AWS-IoT using an STM32 microcontroller. </p>
<p>Till today, we were writing the certificates to the flash and locking the flash from external reading. As the application code increases, we're getting lesser space on the flash so we were planning to move the certificate externally on an SD card / EE... |
2017-02-10T18:22:27.323 | <p>Do you need to? You can implement a cryptographically secure random generator if you have two things: some rewritable secure storage, and an initial seed. That is, it's enough to seed the RNG once, and then save its state and work off the saved state. It isn't ideal, it would be better to mix in entropy periodically... | |security|hardware| | Can I implement a (weak) entropy source in FPGA? | 1010 | <p>I'm working with an IoT platform in FPGA for evaluation and prototyping. I need to provide support for TLS, and for that I need an entropy source.</p>
<p>I understand that true random noise sources are quite specialist (if even practical) in FPGA, since the device performance is often pretty good (and hard to find ... |
2017-02-11T20:06:19.907 | <p>Alexa supports <a href="https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/speech-synthesis-markup-language-ssml-reference" rel="nofollow noreferrer">SSML</a>, which is an XML-like markup language for speech. Instead of returning plain text from your service, you can use SSML responses. The <c... | |alexa| | How can I change Alexa's pronunciation of a specific word in a skill? | 1016 | <p>Sometimes, when developing an Alexa skill and programming the responses from my service, Alexa mispronounces one of the words in my reply, confusing the user.</p>
<p>For example, if I wanted Alexa to say a word in a different language (perhaps for a language learning skill), <strong>how can I tell Alexa how to pron... |
2017-02-13T13:42:30.517 | <p>From the context, I believe it is referring to interconnectivity <strong>with other alarms in the house</strong>. From earlier in the article:</p>
<blockquote>
<p>Most important, an alarm should connect wirelessly with other alarms in the home, or come in a hardwired version that you can wire to other alarms, so ... | |smart-home|roost| | How does the Roost Smart Battery connect? | 1022 | <p>I've been reading about the Roost Smart Battery. Essentially, it's a battery you can install in your smoke detector which is supposed to notify you on your phone if your smoke detector goes off. It also gives you the capability of silencing your smoke detector from your phone.</p>
<p>According to <a href="http://... |
2017-02-13T17:21:19.743 | <p>I think you will find modules without too much trouble, there have been chips around for over a year that I found (and there is a module on Kickstarter which looks like a simple small production run sales testing exercise).</p>
<p>A 6LoWPAN to 3G gateway is probably a bit of an esoteric use case - any you can find ... | |6lowpan| | Are there any 6LoWPAN to 3G gateways available on the market? | 1024 | <p>I'm looking for a gateway to pass from a 6LoWPAN over 802.15.4 network to 3G. Are there any on the market, or do I have to build one for myself based on Arduino or Raspberry Pi?</p>
|
2017-02-14T19:28:34.000 | <p>A slightly obscure answer is 'from the sensor'. By making the hardware event driven you can potentially improve the standby power by such a large magnitude that a battery can be regarded as a non-replaceable part of your hardware.</p>
<p>See <a href="http://www.bristol.ac.uk/engineering/research/em/research/zero-st... | |smart-home|sensors|power-consumption|sustainability| | Where can I harvest energy in my home to power my wireless sensors? | 1040 | <p>I was reading this article, <a href="http://www.batterypoweronline.com/main/articles/five-building-blocks-of-self-powered-wireless-sensor-nodes/" rel="nofollow noreferrer">"Five Building Blocks of Self-Powered Wireless Sensor Nodes"</a> (shared on <a href="https://iot.meta.stackexchange.com/a/253/14">IoT M... |
2017-02-15T07:47:53.037 | <p>Key here is the datasheet as linked in <a href="https://iot.stackexchange.com/a/1068/54">Jimmy Westberg's answer</a>. The sensor will output: </p>
<blockquote>
<p>The 4-20 mA vibration transmitters are piezo-electric accelerometers of compression type and provide a 4-20 mA output signal proporti... | |sensors| | How to calculate frequency with the voltage received from a vibration sensor? | 1048 | <p>I have been working on a project recently and I am using Sensor <strong>SPM SLD 723</strong>
to read variations in vibrations.</p>
<p>The output I received from the sensor is only in volts, how can I convert this voltage into Frequency (Hz)?</p>
<p>Edit : Actual data received from Device</p>
<p><a href="https://i... |
2017-02-15T08:13:44.340 | <p>For longer distances, I would recommend you look for a device that uses radio waves instead of Bluetooth but a word of warning, they are a bit bulkier and I'm not 100% if they make them specifically for keys but I do know a lot of the newer pet tracker are utilizing radio wave technology such was "Findster" pet trac... | |wifi|protocols|bluetooth-low-energy|lora|beacons| | Is Bluetooth a good enough protocol for "lost my keys" beacons? | 1049 | <p>Bluetooth beacons for localizing lost objects <a href="http://www.tomsguide.com/us/best-key-finders,review-2657.html" rel="noreferrer">are beginning to spread</a>. You can locate them using an app on your smartphone (yes, and create an account, share on facebook your objects, ...) with a closer/further logic.</p>
<... |
2017-02-15T10:31:13.390 | <p>The architecture which you propose seems OK. You can build more functionality on top of this, such as authentication and request sanitisation (for example time of day controls, rate limiting, etc) so it's a great example to investigate.</p>
<p>There are probably some important details in the implementation which yo... | |raspberry-pi|microcontrollers|wifi|esp8266|system-architecture| | Is this architecture feasible and flexible? | 1051 | <p>I'm having a but of trouble making sure my project really is feasible.</p>
<p>What I want to archive:
Control my Senseo coffee machine via internet. It boils down to simply controlling 2 buttons.</p>
<p>First easy solution:</p>
<ol>
<li>Setup a NodeJS server on my Raspberry Pi.</li>
<li>I plug my Raspberry GPIOs ... |
2017-02-15T14:58:53.660 | <p>Yes, there already are such devices.</p>
<p>If you are not bound to the rotary dial there are dimmers out there (e.g. <a href="http://www.smarthome.com/switchlinc-dimmer-insteon-2477d-remote-control-dimmer-dual-band-white.html" rel="nofollow noreferrer">Insteon 2477d</a>). Probably there some rotary versions too. T... | |smart-home|communication|system-architecture|lighting| | Can a dimmer switch be connected to the IoT? | 1054 | <p>I'd like to connect a button "dimmer switch" like this one:</p>
<p><a href="https://i.stack.imgur.com/gyl1U.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gyl1U.png" alt="picture_of_a_rotary_dimmer_ligts_and_a_living_room"></a></p>
<p>to the IoT. Maybe there's already such a device, I just coul... |
2017-02-16T16:04:19.480 | <p>I'd go for OwnTracks (iOS + Android) which lets your phone send GPS-data over (preferably MQTT) the internet. You may set up this to poll your phone and let a server see if the signal is approaching the house which indicates that the phone is traveling in a car or the best would be to have an (old) phone inside the ... | |sensors|smart-home| | Automatically open a garage door when approaching by car? | 1060 | <p>There is this thing I noticed in my neighborhood: when Sam is waiting for his not-so-automatic door to open, he stops the traffic for 20 or 30 seconds, due to the street configuration.</p>
<p>I want to buy a house in this neighborhood (I now own a flat there), and the seller already installed an automatic door with... |
2017-02-18T18:15:51.517 | <p>One of the key issues with My Friend Cayla is that the audio files it sends are not saved securely. <a href="https://twitter.com/TheKenMunroShow" rel="noreferrer">Ken Munro </a> has carried out extensive analysis on this (and many other IoT devices) and points out that the audio files are available on the Internet, ... | |privacy|smart-toys| | Why was the Internet-connected My Friend Cayla doll banned as a "hidden espionage device"? | 1074 | <p><a href="https://www.cnet.com/news/parents-told-to-destroy-connected-dolls-over-hacking-fears/" rel="noreferrer">According to CNET</a>, the My Friend Cayla doll was banned in Germany because it has been classed as an illegal "hidden espionage device":</p>
<blockquote>
<p>If you're considering purchasing a ... |
2017-02-20T08:23:28.207 | <p>Building upon several years of deploying outdoor wireless sensor networks, I would like to add the following hint:</p>
<p><strong>Think ahead and do not underestimate the problems arising from humidity!</strong></p>
<p>I will answer your question by providing some pitfalls with humidity in outdoor devices. However... | |sensors|wireless| | Temperature sensors affected by rain | 1085 | <p>I am not sure if this is the best place to ask a question like this. </p>
<p>I am working with a wireless sensor network that measure temperature, humidity and illuminance. I have read that outside sensors, should be located in a place where rain does not hit them. </p>
<p>I do not know why should I do this. How a... |
2017-02-21T17:40:05.290 | <p>There are many factors in choosing whether to process data on-device or in the cloud.</p>
<h1>Benefits of processing in the cloud</h1>
<ol>
<li><p>If the algorithm uses floating-point or runs on a GPU, it might not be possible to run on the embedded processor in the sensor.</p></li>
<li><p>Even if it doesn't, if t... | |sensors|aws-iot|cloud-computing| | Why might data be sent to a cloud service when it could be processed on the edge? | 1090 | <p>I was recently reading Amazon's information about the <a href="https://aws.amazon.com/iot-platform/" rel="noreferrer">AWS IoT Platform</a>, and came across an interesting example use case:</p>
<p><img src="https://d0.awsstatic.com/Test%20Images/MasonTests/IceX_3Connected.png" alt="Example of using AWS IoT to detect... |
2017-02-21T19:29:28.017 | <p>After doing some further research, I'm pretty sure <a href="http://docs.aws.amazon.com/iot/latest/developerguide/thing-types.html" rel="nofollow noreferrer">Thing Types</a> <strong>are</strong> what you want.</p>
<blockquote>
<p>Thing types allow you to store description and configuration information that is comm... | |aws-iot|aws| | When setting up 'Things' in AWS IoT, can I have one thing, and then have many instances of that Thing? | 1092 | <p>I might be putting this into software terms, but I just want to have all my things be the same type, but have multiple instances (multiple things). Each thing must be able to be referenced individually as well, and individually subscribe to messages. Then, I could have multiple Raspberry Pi's send data back to AWS... |
2017-02-21T19:44:19.047 | <p>Could you make custom rule by typing the ports (1883 and 8883) and allowing separately with different rules both UDP and TCP on these ports.</p>
<p>See: <a href="https://technet.microsoft.com/en-us/library/cc947814(v=ws.10).aspx" rel="noreferrer">https://technet.microsoft.com/en-us/library/cc947814(v=ws.10).aspx</a... | |security|mqtt|mosquitto|microsoft-windows|whitelisting| | How to modify Mosquitto's Windows Firewall Inbound Rule to only allow connections from specific IP addresses? | 1093 | <p>I am trying to set up IP whitelisting for my Mosquitto broker on Windows 7. To do so I have performed the following steps, based on this article: <a href="http://support.hostgator.com/articles/how-to-whitelist-your-ip-windows-dedicated" rel="nofollow noreferrer">How to Whitelist Your IP - Windows Dedicated</a>.</p>
... |
2017-02-22T09:41:21.273 | <p>Arduino is an open source platform for IoT test projects, and you'd buy either a Arduino device or a cheap derivation, that may have cheaper price or better characteristics.</p>
<p>Same Arduino IDE can be used for all variations, you'll use IDE to install the software and test your programs. Program has one time an... | |networking|hardware|communication| | How to start IoT development to send commands from IoT Hub to Device | 1099 | <p>I'm a .Net developer recently started working on WindowsAzure IoT, but my role is just creating web API's to provide data to client (Mobile App) sent by IoT devices.</p>
<p>I want to send commands to devices, instead of just receiving data sent by devices.
You can say that I just want to work on a simple demo proje... |
2017-02-22T17:22:04.787 | <p>You've questioned both previous answers about the need for a controller/hub. Consider that to make things happen, you need rules to exist. If you want to push a big red button to open a garage door, some rule has to tie the sensor (button) to the desired action (opening the door). There are two ways to make that hap... | |networking|microcontrollers| | What do I need to create my own personal cloud for IoT devices? | 1104 | <p>This is a subject I have been thinking of for a while, especially because the "IoT" concept has been floating around a lot lately.</p>
<p>I will start with what I mean when I say <strong>"IoT"</strong>. I know that the term IoT could mean different things and that sometimes it's misused. It could be a term that is ... |
2017-02-23T08:48:25.077 | <p>Another approach is to buy the components and make them run,and then you decide what do to with the them. Surely you will come up with ideas while developing</p>
<p>You can start with one of the adfruits kits.</p>
<p><a href="https://www.adafruit.com/" rel="nofollow noreferrer">https://www.adafruit.com/</a></p>
<... | |software| | Seeking an idea for an IoT project to keep me occupied | 1108 | <p>I have been coding embedded systems for (*cough*) decades now. Mainly telecomms & satcomm, with some telemetry & SCADA. I can also produce Windows, Linux & browser based apps and have good database knowledge.</p>
<p>Sound like prime IoT developer material? I also have some free time, so, to keep me out ... |
2017-02-23T09:59:34.987 | <p>John is on to a solution that should work. Another alternative is to run all your IoT devices on a WiFi guest account, and everything else on the main account/password. This is a simple way to separate your smart devices from your computer network. It's a less sophisticated method of security but a lot easier to imp... | |networking|security|wifi| | Connect IoT devices directly to Wi-Fi , through VLAN or through a Raspberry Pi? | 1112 | <p>I have a bunch of IoT switches connected to my Wi-Fi.</p>
<p>I am aware of three possibilities to connect and control them.</p>
<ol>
<li>Through the Wi-Fi directly (like Samsung SmartThings does)</li>
<li>Connect them to a personal VLAN and use them (seems more secure).</li>
<li>Connect all the devices to a Raspberr... |
2017-02-23T16:05:28.480 | <p>Please do not waste your time and make the same mistake as hundreds of research groups (including ours) made before for decades and just throw some unspecific sensors into the wild without knowing what you really want to get in the end!</p>
<p>There is <a href="https://www.st.ewi.tudelft.nl/%7Ekoen/papers/WPDRTS06.p... | |sensors|wireless| | What should be considered when building a wireless sensor network? | 1115 | <p>This question originates from <a href="https://iot.stackexchange.com/questions/1085/temperature-sensors-affected-by-rain">a question asking about a specific detail about building wireless sensor networks</a>. While answering the question, I wanted to share some general guidelines for the planning process of a wirele... |
2017-02-23T19:57:16.927 | <p>Take a look at this <a href="https://github.com/atsign-foundation/sshnoports" rel="nofollow noreferrer">ssh! noports</a> I wrote it for to be able to get to my home office/IoT widgets without having to open up ports to the Interwebs..</p>
| |smart-home|networking| | How do I avoid port forwarding when exposing IoT devices to the external Internet? | 1117 | <p>I received some good answers in the question <a href="https://iot.stackexchange.com/questions/1104/what-do-i-need-to-create-my-own-personal-cloud-for-iot-devices">What do I need to create my own personal cloud for IoT devices?</a> and one of the things that I understood from there is that I need to "expose" my HUB o... |
2017-02-24T08:32:54.473 | <p>For simplicity, I'll describe this using a typical smart-home setup as a reference, but nothing here is really fixed by the application. The high level topology is equally suitable for a farm monitoring application covering several kilometres with thousands or sensors, tracking parking spaces in a city, or lighting ... | |networking|system-architecture|topologies| | What is the typical network topology for an IoT network? | 1119 | <p>I see several questions asking about details of an IoT network, including this one about <a href="https://iot.stackexchange.com/questions/1117/how-do-i-avoid-port-forwarding-when-exposing-iot-devices-to-the-external-interne">port forwarding</a> for example. I think it would be useful to ask about what might be consi... |
2017-02-27T09:05:48.303 | <h2>Push vs Poll</h2>
<p>Your proposed solution of sending frequent AJAX requests sounds a lot like <em>polling</em> - you're sending a request every so often to check if the state has changed. It would make far more sense to <em>push</em> changes to the server when the piezo sensor detects a change.</p>
<p>It's the ... | |smart-home|raspberry-pi| | Confused about which technology to use in Smart Home System | 1130 | <p>In my college project (Smart Home System) there's a functionality in which if someone knocks on the door an image has to be displayed on a monitor (in a browser). I am implementing the door knock sensor (Piezo) using an Arduino which somehow has to send commands to the Raspberry Pi to take a photo, which is to be se... |
2017-02-27T15:00:55.507 | <p>Probably the biggest M2M protocol other than MQTT is <a href="http://coap.technology/impls.html" rel="nofollow noreferrer">CoAP</a>. While it doesn't natively implement C++ per se, it does implement C and C#, which are not huge leaps if you already have a good understanding of C++.</p>
<p>Another well known protoc... | |mqtt| | MQTT alternative (which is also compatible with C++) | 1134 | <p>I'm quite new to the Internet of Things world and until now I've only heard of MQTT.</p>
<p>I want to research some other options apart from MQTT. Until now I've not found much more than Webshpere MQ and ZigBee. I know there must be dozens of other protocols, but I don't know how to select a few suitable ones witho... |
2017-02-27T16:11:42.553 | <p>I don't get what you mean by presence, but you can get notifications of door bell button push and / or when motion detection gets triggered.</p>
<p>I understood from the specifications that with SmartThings you can switch either one of them on or off and also drive another SmartThings device like a light switch bas... | |samsung-smartthings|digital-cameras|mobile-applications| | How are cameras utilized in SmartThings? | 1137 | <p>I'm considering getting an outdoor camera like <a href="http://rads.stackoverflow.com/amzn/click/B01DM6BDA4" rel="noreferrer">Ring</a>. Cameras like Ring are listed in the recommended compatible devices in the SmartThings market. So, I'm curious what sort of automation events are available with cameras like this?</p... |
2017-02-28T10:46:18.503 | <p>The standard approach is to connect your gateway to a LORAWAN Network server as well described above.</p>
<p>If you want to connect the gateway directly to your broker you may use the MQTT forwarding function of your gateway: <a href="https://wiki.dragino.com/index.php?title=MQTT_Forward_Instruction" rel="nofollow n... | |networking|mqtt|lora| | How can I interface a LoraWan network with MQTT? | 1140 | <p>I have been working on a project which involves creating a LoraWan network using:</p>
<ul>
<li>Dragino lg01 as a Gateway.</li>
<li>An Arduino Uno and a Dragino Lora shield with a simple LM35 Temperature sensor</li>
<li>As for the Server, I have been looking for something open source and compatible with LoraWan, I h... |
2017-02-28T19:47:39.437 | <p>Is it possible to have some weight measurement plates at the entrances? With a few weight measurement plates in a line at every gate you can identify movement directions, and by using the average weight of a person, you can approximate number of people on the plate at a time. Indeed, it would be possible to differen... | |sensors| | Measure people density in an outdoor area | 1146 | <p>I'm currently working on a project and I need to measure how many people are in an area without any personal interaction. Basically I need to do this in parks. I don't have lot of budget for each place. All outdoor places. I want to control possible collections of people (fights or unusual collection of people).</p>... |
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