I searched on the forum how to use ID255 but found nothing practical https://forum.mysensors.org/topic/8941/mysensors-get-temperature-value-from-another-node-through-the-gateway?_=1684325843882&lang=fr https://github.com/mysensors/MySensors/blob/development/examples/PingPongSensor/PingPongSensor.ino