[Voyage-linux] reading temperature

[Jeff Ramin]

Thanks very much!

I see the temp range according to the ALIX manual
is 0-50 C. I have two boards here, both in aluminum
enclosures, and their current temp is 49.8 C.

Is that on the ragged edge, or do folks commonly see
higher temps without issues?


Stéphane Acounis wrote:
> Le Wed, 25 Mar 2009 08:59:42 -0500
> Jeff Ramin <jeff.ramin at singlewire.com> a écrit:
>
>   
>> Using voyage 0.5.2 on an ALIX board...does anybody know how
>> to get the current temperature off the board?
>>
>>     
>
> Yes, it's explained in the README file:
>
> 4.2 ALIX support
> ======================
>
> 4.2.1 Temperature sensors for ALIX.1 and ALIX2/3
> ================================================
> When running Voyage Linux with ALIX, choose ALIX profile in voyage
> update, the required modules would be added to /etc/modules.  It adds
> the following modules in /etc/modules:
>         w83627hf
>         lm90
>         geodewdt
>
> ALIX.1 board uses w83627hf driver while ALIX.2/3 uss lm90.  You can get
> the temperature reading from sensors program, or get the values from
> sysfs:
>
> (for ALIX.1)
>         cat /sys/bus/i2c/drivers/w83627hf/9191-0290/temp1_input
>         cat /sys/bus/i2c/drivers/w83627hf/9191-0290/temp2_input
>         cat /sys/bus/i2c/drivers/w83627hf/9191-0290/temp3_input
>
> You may also use sensors utility to get the temperature reading.  If
> temp1 reading may not be ready at boot up, you need to modify w83627hf
> section in /etc/sensors.conf:
>
> chip "w83782d-*" "w83627hf-*"
> ...
>         set sensor1 1
>
> Known Issue: the readings returned from w83627hf is not very accurate.
> temp1 reading is too low (~30C) and some offset should be applied.  But
> temp1 reading can move down to 20C if you apply cooling agent on the
> Geode processor.  temp2 and temp3 do not move up or down too much at
> idle or under high low.
>
> (for ALIX.2/3)
>         cat /sys/bus/i2c/drivers/lm90/0-004c/temp1_input
>         cat /sys/bus/i2c/drivers/lm90/0-004c/temp2_input
>
>
>