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Description
Is your feature request related to a problem? Please describe
I have attached a Shelly 1PM Gen4 device to my Zigbee network and can see the Shelly measurements and toggle the switch.
After attaching the sensor addon to the Shelly and connecting a DS18B20, I can see the temperature in the WebUI of the shelly device, but it is not forwarded to the Zigbee network.
Describe the solution you'd like
I would be happy if it were possible for zigbee2mqtt to interpret external DS18B20 temperatures provided by Shelly devices.
Describe alternatives you've considered
An alternative would be not to use Zigbee at all and stick with Wifi.
Additional context
If there is any information I can provide to make development easier, please tell me how to do so.