Shell script for enabling PWM fan control on FriendlyElec (NanoPi) SBCs.
Only tested on NanoPi NEO3 with Armbian. But should work for most SBC with the 2pin fan connector.
git clone https://github.com/ckwun/nanopi-pwm-fan
cd nanopi-pwm-fan
chmod +x start-pwm-fan install.sh uninstall.shRun the script with default configuration:
./start-pwm-fanCustom configuration can be made by modifying the pwm-fan.conf file.
Run the script with config file:
./start-pwm-fan pwm-fan.conf| Name | Description | Default |
|---|---|---|
| PWM | PWM API path | "/sys/class/pwm/pwmchip0" |
| TEMP | Thermal API path | "/sys/class/thermal/thermal_zone0/temp" |
| PERIOD | Total period of the PWM signal | 8000000 |
| POLARITY | Polarity of the PWM signal | "normal" |
| TARGET_TEMPS | If current temperature is greater than TARGET_TEMPS[i], duty cycle will be set to DUTY_CYCLES[i] | (65000 60000 55000 50000) |
| DUTY_CYCLES | The active time of the PWM signal | (8000000 6000000 4000000 2000000) |
| DEFAULT_DUTY_CYCLE | Duty cycle will be set to this value if current temperature is lower than all TARGET_TEMPS | 0 |
For more info, see: kernel.org - Pulse Width Modulation (PWM) interface
Install it as systemd service, and enable it to auto start at boot:
./install.shStop and disable the service, remove all files added by install.sh:
./uninstall.sh