Als see this comment: Add fan control utility · Issue #602 · balena-os/balena-raspberrypi · GitHub
At the moment the fan in a raspberry pi 4 continues to spin at 100%. Pls support changing this, multiple approaches possible, see Raspberry pi 4 fan PWM configuration : r/raspberry_pi
Hi @o2utko97i,
Welcome to balena forums, from the reddit you linked it seems that you want to add a device tree overlay in the config.txt.
You can do that directly from your fleet. Browse to your fleet in the dashboard, then “Configuration”, then “Define DT overlays”, and finally click activate and add the value you’re interested with, from the sub reddit info you gave you might want to fill in "gpio-fan,gpiopin=14,temp=80000".
You can also refer to the documentation here that will guide you in adding your custom dtoverlay to your config.txt via a fleet variable. The same format is expected with both options, if you want to use several device tree overlay you need to separate them between comma: BALENA_HOST_CONFIG_dtoverlay = "i2c-rtc,ds1307","lirc-rpi","gpio-fan,gpiopin=14,temp=80000"
If that’s still not clear enough don’t hesitate to ask.
Thanks, this indeed works