Introduction

This custom component for Home Assistant enables PWM fan control for Geekworm's x735 Shield (V2.5 & V3.0) on RPis running Home Assistant OS.

Installation

• Copy contents of folder 'custom_components' to Home Assistant's <CONFIG>/custom_components/ folder
• Copy contents of folder 'python_scripts' to Home Assistant's <CONFIG>/python_scripts/ folder
• Restart Home Assistant
• Copy contents of configuration.yaml into your Home Assistant configuration.yaml
• Copy contents of automations.yaml into your Home Assistant automations.yaml
• Restart Home Assistant

Configuration

• adjust the fancurve in <CONFIG>/python_scripts/x735_fancurve.py to your needs

How it works

Once set up following happens:

• the automation triggers the python script 'x735_fancurve.py' whenever the temperature of the CPU changes
• the python script then reads the cpu temperature from 'sensor.processor_temperature', calculates the new fan speed, calls the service 'x735_fan.set_speed' and updates the sensor 'x735_fan.speed'
• the service 'x735_fan.set_speed' then changes the fan speed using RPi.GPIO