| **To update a thing shadow** | |
| The following ``update-thing-shadow`` example modifies the current state of the device shadow for the specified thing and saves it to the file ``output.txt``. :: | |
| aws iot-data update-thing-shadow \ | |
| --thing-name MyRPi \ | |
| --payload "{"state":{"reported":{"moisture":"okay"}}}" \ | |
| "output.txt" | |
| The command produces no output on the display, but the following shows the contents of ``output.txt``:: | |
| { | |
| "state": { | |
| "reported": { | |
| "moisture": "okay" | |
| } | |
| }, | |
| "metadata": { | |
| "reported": { | |
| "moisture": { | |
| "timestamp": 1560270036 | |
| } | |
| } | |
| }, | |
| "version": 2, | |
| "timestamp": 1560270036 | |
| } | |
| For more information, see `Device Shadow Service Data Flow <https://docs.aws.amazon.com/iot/latest/developerguide/device-shadow-data-flow.html>`__ in the *AWS IoT Developers Guide*. | |