| # Latte Panda Mu Lite Board | |
| I have three modules | |
| N100 8GB Active Cooling | |
| N100 16GB Passive Cooling | |
| N305 16GB (BRICKED Sent back to DF Robot) | |
| --- | |
| # Power | |
| | Voltage | Current | Power | Note | | |
| |-------------|-------------|--------------|-| | |
| | 18V | | STOP | | |
| | +10 | +10 | FORWARD 100mm/s | | |
| | -10 | -10 | BACKWARD 100mm/s | | |
| | -10 | +10 | COUNTERCLOCKWISE 180°/s | | |
| | +10 | -10 | CLOCKWISE 180°/s | | |
| # Battery Teleoperation SSH WiFI | |
| Final test with the robot under battery power with SBC, AT324, WiFI and motors running with SSH teleoperation form keyboard | |
| https://github.com/user-attachments/assets/86d634cf-5507-45de-8ebf-013d29c1c32a | |
| ## SETUP UART ACCESS TO TTYS0 DEBUG UART | |
| Modify GRUB so that the operating system connects tothe serial port for access | |
| ``` | |
| cat /etc/default/grub | |
| sudo nano /etc/default/grub | |
| ``` | |
| Edit the GRUB to make sure the following lines woirk | |
| ``` | |
| GNU nano 7.2 | |
| /etc/default/grub * | |
| # If you change this file, run 'update-grub' afterwards to update | |
| # /boot/grub/grub.cfg. | |
| # For full documentation of the options in this file, see: | |
| # info -f grub -n 'Simple configuration' | |
| GRUB_DEFAULT=0 | |
| GRUB_TIMEOUT_STYLE=hidden | |
| GRUB_TIMEOUT=0 | |
| GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Ubuntu} ) 2>/dev/null || echo Ubuntu` | |
| #2025-11-22 Adding the serial port access via ttyS0 that I ound is the debug consol | |
| GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0,115200n8" | |
| GRUB_TERMINAL="console serial" | |
| GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1" | |
| # If your computer has multiple operating systems installed, then you | |
| # probably want to run os-prober. However, if your computer is a host | |
| # for guest OSes installed via LVM or raw disk devices, running | |
| # os-prober can cause damage to those guest OSes as it mounts | |
| # filesystems to look for things. | |
| #GRUB_DISABLE_OS_PROBER=false | |
| # Uncomment to enable BadRAM filtering, modify to suit your needs | |
| # This works with Linux (no patch required) and with any kernel that obtains | |
| # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) | |
| #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" | |
| # Uncomment to disable graphical terminal | |
| #GRUB_TERMINAL=console | |
| # The resolution used on graphical terminal | |
| # note that you can use only modes which your graphic card supports via VBE | |
| # you can see them in real GRUB with the command `vbeinfo' | |
| #GRUB_GFXMODE=640x480 | |
| # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux | |
| #GRUB_DISABLE_LINUX_UUID=true | |
| # Uncomment to disable generation of recovery mode menu entries | |
| #GRUB_DISABLE_RECOVERY="true" | |
| # Uncomment to get a beep at grub start | |
| #GRUB_INIT_TUNE="480 440 1" | |
| ``` | |
| Update grub, whatever that means | |
| ``` | |
| sudo update-grub | |
| ``` | |
| Log | |
| ``` | |
| sona@sona-lp-n100-8gb:~$ sudo update-grub | |
| Sourcing file `/etc/default/grub' | |
| Generating grub configuration file ... | |
| Found linux image: /boot/vmlinuz-6.14.0-32-generic | |
| Found initrd image: /boot/initrd.img-6.14.0-32-generic | |
| Found linux image: /boot/vmlinuz-6.14.0-29-generic | |
| Found initrd image: /boot/initrd.img-6.14.0-29-generic | |
| Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi | |
| Warning: os-prober will not be executed to detect other bootable partitions. | |
| Systems on them will not be added to the GRUB boot configuration. | |
| Check GRUB_DISABLE_OS_PROBER documentation entry. | |
| Adding boot menu entry for UEFI Firmware Settings ... | |
| done | |
| ``` | |
| Reboot and see if you bricked the OS | |
| ``` | |
| sudo reboot | |
| ``` | |
| So, it works and doesn't. On the screen I see ```unsupported port speed``` and on the serial terminal on the host I see that at 9600 I can see the dump | |
| I redid the instruction setting the speed to 115200 | |
| --- | |
| #### 2025-11-22-T0900 Test Board 2 | |
| I powered bypassing the jack and the power button does not work | |
| I connected jack, disconnected uC serial, and it takes a while to power on | |
| I see nothing on the debug uart ttys0 | |
| Screen shows no sign of activity | |
| A single click on the power button will shut down the SBC | |
| Shutdown doesn't work | |
| #### 2025-11-22-T1041 Test Board 1 | |
| Powered | |
| Checksum error a few reboots | |
| Powered on turn on screen | |
| tested debug uart, see nothing | |
| --- |