How to get a property from a Zigbee device using MQTT

Configuration Zigbee
1

I’m using a Sonoff SMV where it says to send to

zigbee2mqtt/FRIENDLY_NAME/get

with the payload:

{“battery”: “”}

which seems fine but where does the reply go? If I subscribe to the same topic I just get the {"battery": ""} payload.

2

I asked chatgpt and it told me to subscribe to the friendly name topic:

zigbee2mqtt/FRIENDLY_NAME

and the response came though ok.