I need to send a downlink messages over iot hub but i cannot find any documentation about it! We are trying to send the 8 bytes inside the content of the message and we also tried send the json object used in the downlink callback (over http) in the body.. but it is not working.
The output in the sigfox backend is:
We need to know, also, if the sigfox backend stores the downlink message and if it stores for how long.
We need also to know how can we send duplicate messages over the IoT hub. In the backend i cannot enable it!! Is very important for us.