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# Universal K80 Cooling
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This is a Linux cooling control software, which uses an Arduino Uno, PWM fan, and Python 3. It was designed for use with a Tesla K80 (a datacenter GPU without fans), but should work with any NVIDIA GPU.
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This will determine the speed your fan (connected to your Arduino) should run at based on the highest temperature
between your GPUs, then will send that speed to your Arduino.
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Make sure to set the port in the .py file you use!
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### How to use
1. Connect the Arduino to the fan according to this diagram:
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2. **Set the port variable**
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1. Instructions for finding the port are in the Python code.
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3. Upload `Arduino/rx_speed.ino` to your Arduino Uno, then run `Python/tx_speed.py` .
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1. Make sure not to run the Python file until the Arduino sketch is done uploading! It should only take a few seconds.
5. Revel in your success!
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1. If you plan to use this constantly, make sure to create a service that starts the Python code on boot.
### My setup
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- I use [this ](https://www.thingiverse.com/thing:4960323 ) 3D-printed fan adapter for my Tesla K80; I highly recommend it.
- I also remixed it into a 92mm version [here ](https://www.thingiverse.com/thing:5408988 )!
- Also, I use [this ](https://www.amazon.com/8025-DS08025R12U-0-7A-4Wire-Cooler/dp/B08PYLMGVM ) fan. It's not necessarily a *bad* fan, but it's very loud.
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In the long-term, I'm planning to build my own front cover for my PC case (a Corsair 175R), and will have a spot for my
Arduino and wiring in it.
Pictures will be added later once my setup is complete. Don't expect it to happen anytime soon, though.
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### Notes and Limitations:
- This currently **only supports NVIDIA GPUs**
- This currently **only supports normal PWM** , not delta PWM
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- You *may* need to change some variables in the Arduino code depending on your fan's specifications.
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- Try looking up a datasheet
- This was designed for an Arduino Uno, and should work on one. I don't know about running it on anything else, though.
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- `tx_speed.py` works fine, but it's just an infinite loop. I'm working on marking a version that uses a cron job, but it's not done yet.
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### Resources I used
- Python-Arduino communications library - [pySerialTransfer ](https://github.com/PowerBroker2/pySerialTransfer )
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- Thanks for the help figuring this out, [PowerBroker2 ](https://github.com/PowerBroker2 )!
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- Arduino PWM fan control - [25 kHz 4 Pin PWM Fan Control with Arduino Uno ](https://create.arduino.cc/projecthub/tylerpeppy/25-khz-4-pin-pwm-fan-control-with-arduino-uno-3005a1 )
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- This is the basis of my arduino-fan diagram
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- See NVIDIA GPU temperatures - [GPUtil ](https://pypi.org/project/GPUtil/ )
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### TODO
- Add diagram for wiring LED lights
