I have a weather station which is publishing to AWS IoT.
It reports it's state as well as measurements of the environment by publishing to shadows service messages of the format:
{
"state": {
"reported": {
"temperature" : 22,
"humidity" : 70,
....
"wind" : 234,
"air" : 345
}
}
The station has some interactive properties like _led1 and _led2 which I can also report and update via Shadows service by setting "desired" state. To do that I can send to a device message like that:
{
"state": {
"desired": {
"_led1" : "on",
"_led2" : "off",
....
"_lock99" : "open"
}
}
Thanks to shadow service Whenever device gets online it will receive synchronized state and will turn the leds and locks into desired position.
However, sometimes I want to operate the device in real-time: when troubleshooting a device - I want to send a real-time command to reboot it - and if device is live and receives the message I want to reboot it. If device was offline, then nothing happens (the reboot command never reaches the device).
So what would be the best way to control device in real-time? Still try to play with the shadows service to achieve that? Or simply create a separate topic eg. my-things/{thing_name}/real-time-commands and force device to subscribe to it?
