I just opened the log file it shows 3 things:
1) At start (first few minutes) I see on one channel WriteSuccess = -401 instead of 200
2) One channel is giving regular writeSuccess = -302 instead of 200
3) The channels that report back 200 do not always update all 8 fields. Some times half of them are updated.
Vinod I looked at the MKR1000 but to use that one I have to change my sensor inputs. At this moment I'm using 12 analog inputs. Sadly the MKR1000 has only 7 inputs.Is there another way to see if I have a problem with the memory? At this moment I dump the data also to the serial output just as commond before I send it to ThingSpeak, and it shows the right values on the Serial-monitor, but not in ThingSpeak.
I'm trying now to remember what I have changed (it worked great for almost a year)... the one thing that pops up is that I have added a serial-sensor as well. Directly connected to one of the serial inputs of the Mega. Is the ThingSpeak Arduino library using serial bus somewhere?