Now I will try to integrate my RF433 Wireless Receiver (built on Arduino with Ethernet Shield) with MQTT, just to acquire my photovoltaic production data in my future Home Automation System
I don't write nothing more about my acquisition system; this is my old post about that:
Now I would like to transmit data to my MQTT broker, for the future integration with OpenHAB
So, I have to edit the code of the Arduino sketch and let it to publish messages to the MQTT broker. In this time, the receiver publishes data to a HTTP REST Web Service
Well, using Arduino IDE (the same thing used for the SONOFF firmware upload), I open the sketch and edit the code.
I omit the technical details about the code because it's not the purpose of this post, but if you are interested in it, write me an email; I will be happy to share my code with you.
I chose the following MQTT topic:
I followed the same naming convention as the SONOFF :
The content of the message is simply the value of the production in Watt.
Here are the published messages, through mqtt-spy:
And here is the receiver:
Currently it's "mute", but the next step would be adding a led to monitor its status and eventually some environmental sensor...