Hi Wolferl, thanks for all the help!

I managed to get it working on my ESP32, now unit 13000212 is uploading nicely to uradmonitoring 🙂
See attached image for the result.

One issue that I still need to resolve is that my timers are off with almost 5 seconds…
In short, when almost reaching 60 seconds (e.g. 55 seconds) my uploads prematurely start instead of after 60 seconds (if function set to 61).
So this means it uploads the data gathered over 55 sec. instead of 60 sec…

If I comment my upload functions the timer works perfectly, its like these functions are called too soon.