@juan_peroza JSON is not a protocol, it’s just a data representation. You can send whatever you want, but JSON is not very space efficient, and is usually not the best choice for data sent over a (very) low bandwidth link such as LoRa, SigFox, NB-IoT, or BLE. It’s usually better to use an optimised binary format in those cases.
@seb I have not attached it yet, was doing the homework on what will work best.
Will try it on the 3.3V, might go with a digital reading as all I am looking for is a true/ false statement to activate the relay