@sglue Thanks for replying but that does not work in Domoticz. Just as mentioned in the thread. Domoticz only acknowledge that a sensor is alive if it sends new data. Not by sending a status that it has received earlier.
For now I have solved it by a dummy switch in my sketch that alternates on and off at every heartbeat, but I don't think that is a very nice solution. And I have to have two different script checking my sensors in Domoticz. One for the ones that heart beats is working in (ie X10) and one for my MySensors nodes.