CPU and Enviroment Temperatur


are this temperature for a BeagleBone ok?:
CPU: 60°C
Enviroment: 31.5°C

The CPU I get with:
cat /sys/class/hwmon/hwmon0/device/temp1_input

60°C seems a little bit high, or not?

Thank you!

It is high for just sitting on a table in open air.


Hello Gerald,

it is in a closed Din Rail housing and in a electrical distributor box.
In the Box, the enviroment are 31.5°C … so not sooo high.

But also the Beaglebone on my desk, complete open, has 56°C

Environment is important, but if there is no venting in the box, then the heat can stay in the box and it can build up. Not a good condition if it can be avoided. The BBB is not industrial rated.

56 is a little warm as well. But that depends on what you are using it for and how much time is spent running full speed. The heat comes out the bottom of the board, so just laying in on a table is like putting it in a box.


I have seen this too. Free air - some boards running at 40-45 some at 55-60*C.
I suspect that it is a configuration issue, however, I have not been able to prove this.
Not the same code in each instance - and I’m not very strong on the SW side of
things so can’t tell what the differences are.
I plan on spending more time on this in the near future - will let you know if I find something.
Hopefully, you may be able to narrow it down some too.


Stop wasting your time with the built-in temp sensor on the am335x..

TI chose to NOT upstream it for a reason.

If you care about temp's stick a real temp sensor on your board.


I´m not sure how exact the value is:
cat /sys/class/hwmon/hwmon0/device/temp1_input

Because when I touch the surface, it is just a little warm.

The Beaglebone is most time in idle mode:
BBB1 (in housing) 60°C:
16:41:22 up 13 days, 2:13, 1 user, load average: 0.29, 0.24, 0.18

BBB2 (on the table) 56°C:
14:41:09 up 3 days, 21:41, 1 user, load average: 0.04, 0.05, 0.05

A fan I don´t want to build in. I try to made holes at the bottom side of the closed housing.

Try measuring with a thermometer.


Throwing a dart at a dart board would be more accurate..


haha … that´s good … thank you!!

Ok, I forget to internal temperatur sensor

This thread could be closed!