Cooling Fan Control Raspberry Pi Libreelec.

GaryB · August 6, 2017 at 11:07 PM

I should have explained why I said that. If your storage is on an SD card constantly updating a log file can shorten the life of the card, though I guess just the one file a few times a day won't have much impact. Mine is stored on a RAID array on a server so it isn't an issue for me.

No, no resistance. I connected the fan to +5v and the collector, emitter to GND, GPIO pin to base. (I think that's right, got it the wrong way round when I first typed it.)

Mario77 · August 7, 2017 at 12:39 AM

Quote from GaryB

I should have explained why I said that. If your storage is on an SD card constantly updating a log file can shorten the life of the card, though I guess just the one file a few times a day won't have much impact. Mine is stored on a RAID array on a server so it isn't an issue for me.

No, no resistance. I connected the fan to +5v and the collector, emitter to GND, GPIO pin to base. (I think that's right, got it the wrong way round when I first typed it.)

Ok got you...don't think logging would be an issue tough...I can send logs to connected hdd so shouldnt be a problem...log only contains 16 lines after 8 hours..

Thanks a lot for your help Gary...didn't think it was going to be this easy to be honest as the scripts I found online weren't for LE and I m useless to edit coding....

Now waiting for some bits trough the post to complete the circuit...in the meantime the script is running without the fan..I ll let you know when fan is up and running...

Thanks again

Mario77 · August 18, 2017 at 11:05 PM

Hi Gar

Quote from GaryB

I should have explained why I said that. If your storage is on an SD card constantly updating a log file can shorten the life of the card, though I guess just the one file a few times a day won't have much impact. Mine is stored on a RAID array on a server so it isn't an issue for me.

No, no resistance. I connected the fan to +5v and the collector, emitter to GND, GPIO pin to base. (I think that's right, got it the wrong way round when I first typed it.)

Hi Gary..just to let you know that I got the fan and connected and all is working fine..just playing with the min and max temperatures...just not sure if the fan got to be facing in or out..going to be screwed in the top cover...

GaryB · August 19, 2017 at 11:02 AM

I mounted mine with the fan under the lid of the case with air blowing out (upwards), and drilled 8 holes that lined up with the fan. My reasoning was that's the way the air would be flowing when the fan isn't running due to convection currents. It probably doesn't really matter though, the main thing is just that air moves through the case.

jose383 · August 24, 2017 at 1:34 PM

GaryB What transistor do you recommend?

S8050 vs 2N2222A

What is the difference ?

Mario77 · August 24, 2017 at 3:55 PM

Quote from jose383

GaryB What transistor do you recommend?

S8050 vs 2N2222A

What is the difference ?

GaryB used the S8050..I used that 1 too and is working fine..

ace310 · August 24, 2017 at 11:07 PM

I think any npn transistor should work with similar values. I am using 3904 npn, which is working all good.

Jayge91 · November 3, 2017 at 4:14 AM

I don't want to thread jack, but where are you guys getting the pi tools addon from?

I've searched and searched and can't seem to figure it out. On my C2 running 8.2 it's not listed anywhere in the stock LibreELEC repo.

**chewitt** · November 3, 2017 at 4:30 AM Official Post

Jayge91 the "Pi Tools" add-on is only built for Raspberry Pi images (hence the name)

**nickr** · November 3, 2017 at 4:44 AM Official Post

Libreelec is open source so you are welcome to create a pr for adding this add-on for c2

**chewitt** · November 3, 2017 at 4:59 AM Official Post

HK provide their own version of wiringPi, which almost certainly means they have adjusted it to match the GPIO layout. I doubt the Pi add-on can be ported directly.

valdolopes · February 28, 2018 at 9:26 PM

for some reason I can not succeed in autostart for this script:

[Unit]

Description = PWM Fan Control

After = mediacenter.service

[Service]

Type = simple

ExecStart = / usr / bin / python /storage/fan/cooler.py

Restart = always

[Install]

WantedBy = default.target

Path: /storage/.config/system.d/fanctrl.service

What is wrong?

Mario77 · March 1, 2018 at 12:59 AM

Quote from valdolopes

for some reason I can not succeed in autostart for this script:

[Unit]

Description = PWM Fan Control

After = mediacenter.service

[Service]

Type = simple

ExecStart = / usr / bin / python /storage/fan/cooler.py

Restart = always

[Install]

WantedBy = default.target

Path: /storage/.config/system.d/fanctrl.service

What is wrong?

Display More

Are you trying to control fan speed too or just on and off?

valdolopes · March 1, 2018 at 1:13 PM

I found a script where it also controls the fan speed, rename with autoexec.py in the userdata folder it works ok, but when using other gpio pins, it causes the script to stop. Here's the py script:

[anexo = 3178] [/ attach]

Mario77 · March 1, 2018 at 2:18 PM

Are you sure that script is for libreelec or at least for Rpi? I m not good with scripts but can't find anything that is measuring the temp in the script something like "vcgencmd measure_temp"

valdolopes · March 1, 2018 at 2:31 PM

Yes! take a look

http:// w ww. instruc tables.com/ id/PWM-Regulated-Fan -Based-on-CPU-Temperature-for-Ras/

sorry, I do not know if the forum accepts third-party links, contains some spaces

Mario77 · March 2, 2018 at 12:56 AM

I m gonna try to explain to you how my script is working and enabled...assuming you already installed RPI tools addon...try to follow this...

Make a folder in Storage/.kodi/userdata/and name it "fan" and place your cooler.py in there.Anywhere in /storage should work but I m using this location as an example and that is where I keep my scripts..

Copy this and save it as "cooler.service"

Code

[Unit]
Description=PWM Fan Control

[Service]
Type=simple
ExecStart=/usr/bin/python /storage/.kodi/userdata/fan/cooler.py
Restart=always
RestartSec=20

[Install]
WantedBy=kodi.target

Display More

Then place the "cooler.service" in Storage\.config\system.d

After you place your file in system.d go to ssh to your Rpi

Enable it with

Code

systemctl enable cooler

and then start it with

Code

systemctl start cooler

Check if its working

Code

systemctl status cooler.service

Hope I helped you in some way.

valdolopes · March 2, 2018 at 3:28 PM

I suppose there is something wrong with the script, because although it works as autoexec.py I did not notice fan speed variation according to temperature increase, at the moment I will use the scripts already posted in this topic, because it works correctly for me.

Thank you friend!