I have several issue comes from a customer who run MD4/MC31 multimaster system.
They have MD4 who are not anymore able to keep the RTC.
To be sure, I took a kit apart and tested it myself. Finally, I move the MD4 alone and tried it with a very small program. Only value to show date/time/temp.
When it boot, the RTC is resetted and the temperature is OK (around 40 Celsius).
But when I update the date/time from iQanRun, the date and time appear to be OK, but the internal temp goes to -1C and give critical error.
I did a short video to show what I did and to show what's append.
There is some picture to complete:
Customer support service by UserEcho