@matkor it is currently not possible. https://github.com/mysensors/MySensors/issues/1312 suggests a solution but there has been no forward progress lately.

@drock1985 I guess your switch string should be as follows, #Switches (Lights) switch 1: platform: mqtt state_topic: "mygateway1-out/2/1/1/0/2" command_topic: "mygateway1-in/2/1/1/0/2" name: "test1" payload_on: "1" payload_off: "0"

@dzairo there is a nice PinChangeInterrupt library that you may want to look at.

@BulldogLowell thank you, I uploaded it and so far it works fine.