@emc2 Indeed on a Raspberry with direct connection. Thank you for the link, I will follow the progress.

@emc2 said:

@rollercontainer said:

TSP:CHKUPL:FAIL (hops=255)
!TSM:UPL:FAIL

Did you end up finding what was the problem?
I have the same errors on new nodes compiled with the stable release. It was working fine on the dev branch before, and my old sensors still works, but not the new ones...

Edit:
I had to revert to https://github.com/mysensors/MySensors/tree/244f79771acb60588c6b4fd6dd0fa4b5daf4cb64
June 26th commit break everything for me. Unfortunately a lot of changes were made this day...

Thank you, had the same problem, replaced it with the files from the 26th and got it working.