Reading CPU Temperature from Linux

sdurbin@phoenixcon.com

Has anyone found a temperature on the device that relates directly to CPU Temperature?  I have a customer with this requirement at the moment.

I have found a temperature from a humidity sensor at:

/sys/class/hwmon/hwmon0/temp1_input

but I am not sure where this temperature is taken.

Any ideas or help would be greatly appreciated.

Thanks,

Steve

Frank Phoenix Contact Deutschland Support

Hi Steve,

I'll check this and come back to you asap.

cheers

Frank

Frank Phoenix Contact Deutschland Support

Hi Steve,

I've news for you. We've a humidity sensor mounted directly left below the heat sink.
The temperature can be read with /sys/class/hwmon/hwmon0/temp1_input.

Means we are measure the temperature of the housing not of the CPU (there is no sensor installed)

take care!

rcasadomozo

HI Frank.

 I have edited the tempertaura and humidity file and the value that appears is 47445 What value will be refere? 47.445ºC and that of humidity puts 10906

 

Marcel PLCnext Team PxCD

Hi rcasadomozo,

you can look in the following link for exact information about the contents of the files.

https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface

The temperature should be in millidegree Celsius, as you described. The humidity should be indicated in milli-percent.

pudderjagar

Hi

Can you tell me how to make a variable for it on the AXC F 1152 controller so I can show it on the webhmi?

I need the temp in the housing. If it not possible I can maybe use the CPU temperature but thats not a proper solution.

Martin [PLCnext Technology Team]

Hello,

For the temperature sensor discussed in this thread, there is a system variable available, here:

 

If you need help displaying this on the HMI, please create a new question in the "PLCnext Engineer" category, and someone will answer it there.

~ Martin.