This is the Mongoose OS demo app that demonstrates how to use device shadow to control devices. It implements a simple switch on/off logic, and allows to switch an LED on or off using a shadow. Also it shows how to use shadow to report stats metrics.
Note that Mongoose OS shadow implementation is cross-cloud. It works the same way on Mongoose OS device management dashboard, AWS IoT. Support for Google IoT core is coming soon. You can switch between clouds without changing your device logic, and it'll continue to work.
See fs/init.js file for the idiomatic usage of shadow objects.
This is an animated recording on device management dashboard . ESP8266 NodeMCU was used - note that built-in blue LED is inverted: it turns on when GPIO is pulled down, and turns off when it is pulled high:
Same device, same app, no code changes, works on AWS IoT the same way:
