Controling the FAN

[mijanek]

Hi, I'd like to know, if there is a possibility to control the attached Fan.
I tried with "echo 1 > /sys/devices/virtual/thermal/cooling_device0/power/control" but this resutlts in error:
-sh: echo: write error: Invalid argument

At least to have the possibility to turn it on and off would be nice (much better would be to regulate it more precisely)


But anyway nice device

[steven]

Hi mijanek

We are trying to control the Fan, when the temperature is high the Fan will power on.
otherwise it will power off.
maybe next version will add this function .

Thanks

Kind Regards

steven

[mijanek]

Ok, I'll be happy about that feature..
Regarding freescale is the max. temerature 105C. (for MCIMX6Q5EYM10AC)
My test with detached FAN and 100% CPU load over all 4 cores at 23C environment climbed up to 88C so still enought far away to the maximum, or ist there another limitation lowering that limit?

[steven]

Hi mijanek

Today we have success auto control the CPU Fan,when the temperature up to 70 degree,
the fan will power on otherwise it will power off.

Later we will release the new version which added this .

Thanks

Kind Regards

steven

[Cjcr]

Thank you Steven.

I think the fan is turned off too soon. Seems when it is < 70 degree it stops immediately. That's wrong. It should keep on at least until it reach 60/65 degree for example and then turn off.

This will keep the device in a good temperature for more time

Thats my opinion.

[mijanek]

@Cjcr, I don't think so, this is really fine, this way it just runs only few sec. and stops. 70C is really fine. (If you play videos it goes down from itself without fan)

[Cjcr]

@mijanek but in this way it could be turned off more time because it takes more time to reach 70ºC again.
-
Is the source code available somewhere?

[steven]

Thank you Steven.

I think the fan is turned off too soon. Seems when it is < 70 degree it stops immediately. That's wrong. It should keep on at least until it reach 60/65 degree for example and then turn off.

This will keep the device in a good temperature for more time

Thats my opinion.

Hi Cjcr

Thank you very much for your advice,Next version the Fan control will be more intelligent

Thanks

Kind Regards

steven

[steven]

@mijanek but in this way it could be turned off more time because it takes more time to reach 70ºC again.
-
Is the source code available somewhere?

Hi Cjcr

Our code is on sourceforge:
https://sourceforge.net/p/matrixtv/

Thanks

Kind Regards

steven

[Cjcr]

@mijanek but in this way it could be turned off more time because it takes more time to reach 70ºC again.
-
Is the source code available somewhere?

Hi Cjcr

Our code is on sourceforge:
https://sourceforge.net/p/matrixtv/

Thanks

Kind Regards

steven

Thank you, but I refer to the source code of the fan monitor. But never mind if you will improve it.