Arduino - Opi CPU overheated

3Point14

Plugged in my Arduino tonight. I was testing a UART cable. That was good. When I got the cable working. One of the first things I saw was a CPU at 72C. I unplugged the Arduino and evetything seems okay now. The Arduino is a compatible Uno, so it could be defective. I never noticed a problem on my Rpi, but I doubt I opened dmesg while I was using the Arduino.

Does someone else with an Arduino want to verify that their CPU doesn't overheat when an Arduino is connected?

Survive-Pi

From all I have read on the forum, 72 isn't overheated... but if it is only xx without, i see what you mean.

Give me a command to type in for temps and I will compare my mega clone on a Plus for you...does it matter what sketch is running?

Actually, my ramps/mega compatible board in my 3D printer has been connected and sending serial data continuously for 3 days now...

Tell me what to type and I'll get temps for you

3Point14

I don't know how to get temps. I just saw a warning in dmesg that I'd never seen about the CPU temp. I'll mess with it some more and see if I see anything.

Riconec

3Point14 replied at 2015-11-2 10:19
I don't know how to get temps. I just saw a warning in dmesg that I'd never seen about the CPU temp. ...

Try to use it

• cat /sys/devices/virtual/thermal/thermal_zone0/temp
  

3Point14

Riconec replied at 2015-11-2 21:05
Try to use it

cat /sys/devices/virtual/thermal/thermal_zone0/temp

That works. I didn't see the temp rise above 43 when I reconnected the arduino. Probably a false alarm. The first time, the Arduino was running a sketch that read RFID tags, but I wasn't scanning any tags and I didn't have the IDE up. I'll play some more and try to recreate the problem. Thanks for the help!

3Point14

3Point14 replied at 2015-11-2 10:19
I don't know how to get temps. I just saw a warning in dmesg that I'd never seen about the CPU temp. ...

Thanks! I'll have to try to recreate it.

3Point14

Today, I didn't have the Arduino connected when the CPU temp went up to 75C. However,  I did have a UART cable connected and was running a Serial Console from my Android tablet. I was also doing that when I blamed the Arduino. I disconnected the USB end of the UART cable from the tablet and the temp dropped to 45C. So, I think I suspect the UART serial connection now, even though that doesn't seem like it should have caused it either.

Riconec

Have you solved problem?
Try to open htop and watch if there processes that overloads CPU