I have now checked my log file to verify the battery voltage, then i noticed that last post was yesterday at 22:06 when i looked at the mcGateway the status light did not blink anymore so the mcGateway was the first thing to freeze even that its not in the freezer
Everything worked again after a reboot of the mcGateway.
This might be important, after the reboot of mcGateway then i did only receive one message not several from the mcModules queue, so i guess that mcModule had contact with mcGateway and send messages all the time but it was the ethernet/network part of the mcGateway that was stucked.
After 52 hours the battery is still on 3.540V