Grégory LASSERRE

Thanks @ThomDietrich for your answer. I changed the code just in order to try to solve the issue by myself before to open a thread. I recopy your script, and...

Hello. I followed your instructions and restart setup from beginning + compile/install bluez, but same result : ` pi@raspberrypi:/opt/miflora-mqtt-daemon $ sudo python3 miflora-mqtt-daemon.py Xiaomi Mi Flora Plant Sensor MQTT Client/Daemon...

Hello. I received my Pi zero and tested the script : works like a charm. So, don't know what failed on RPI3/4. I don't have enough knowledge to solve, but...