@mfalkvidd I took a glance at the embeddedadventures code on Github. They have a separate sketch for the samd21. Since I'm using a FeatherM0 could that be the reason why? I don't have the skills to decipher the differences. Once again I appreciate it! I added the serial print to the beginning of loop(). 15:37:58.624 -> At start of loop 15:37:58.624 -> At start of loop 15:37:58.624 -> At start of loop 15:37:58.624 -> At start of loop 15:37:58.624 -> At start of loop

Once again thanks for your help! of course it works now lol. i soldered it back together and it works perfectly!

Would it be wise to close this and move it to Domoticz MySensors forum? It looks like its an issue with mqtt or domoticz.