Hi, It worked. using the 2.2 library solved my issue. Now I'll setup openhab. thanks for your quick and effective answer

Hallo, Here I am again. My question is still the same: Can one use an ESP8266 instead of an arduino plus radio? Not via wifi but exactly as when as I use an arduino with some radio. I know, that all the experts until now wrote, as a gateaway: yes. But you need a present WLan then. For a rf24 you need no WLan. Did anybody succeed in programming the ESP8266 in the way, that it behaves like an arduino with rf24 connected? So you could save a lot of time soldering and searching mistakes.

My Uno with the enc28j60 shield is more stable, but still not THAT stable. Will go a week, sometimes two without crashing. Now it just locks up for no apparent reason. Haven't had a chance to troubleshoot it. interestingly, it always locks up now at a time when the 'receive' (green) LED is lit, so something about receiving a message over the radio is locking it up... I tried using the wiznet shield, but so far I've gotten two bad ones (even the built-in Arduino samples don't work), so I don't put much stock in them any more. I have been planning to swap out my enc28j60 shield for just the little detached module and see if that helps. Just amazes me as much as folks have banged on this stuff for all this time, that it's still unstable, but I guess each one is different, knock-offs, etc.

Ive also just tried it on an arduino Uno and im still getting check wires.

@NeverDie All I can say is that after adding the watchdog I have not had a lockup in 2+ months. Before that, like you, I had random lockups. Based on this positive experience I also added a watchdog to the one repeater I have in my system. Had a brief power outage the other day and everything came back online by itself with no problems.

If anyone is interested in trying out the implementation using UDP packets sent to the subnet broadcast address, check out my pull request https://github.com/mysensors/Arduino/pull/66

I think it is the same problem as in... http://forum.mysensors.org/topic/737/uno-w5100-shield-not-pinging

Original post is now updated (look at the bottom of it). (ping @bjornhallberg)