because openwrt not have forum group per device or open forum per device , but users need at least one open forum for community support for that specific device. If you not understand how community driven things work, try checking out xda or 4pda.
As i said above, i looking for specifc device confgi not tools.
Why are people obsessed with messing with the fan control?
It already has pretty good control, keeping the almost silent fan at the lowest speed to keep the temperature under control.
Sure, if you sleep with one on your pillow at night you might hear the gentle blowing.
And if you roll over onto it the speed will ramp up pretty quickly.
A trick I found out if you want to reduce power consumption and have it run cooler, that is if you don't use the usb port, is to replace the supplied multi voltage smart usb power supply with a standard dumb 5v 30w. This turns off the usb port power and reduces losses in the onboard buck converters.
If you don't understand what I mean, then really you should not be trying to mess with the fan either.
someone already note that in old device forum post.
because openwrt not well optimize fan curve like gl-inet do. gl-inet use PID control by there binary, it have well balance between silence and temperature. and i want to do the same by sh or etc.
If you don't understand what I looking for, Just ignore it.
Just use echo 70000 > /sys/class/thermal/thermal_zone0/trip_point_5_temp. That way the fan will start when the temperature is above 70° C. GL-iNet uses that temperature as the default on its firmware, so it should be safe hardware-wise.
You may prefer to lower that 70000 value a bit, if you think a cooler temperature would provide better longevity for your router in the long term.
If you want to use that PWM setting every time OpenWRT starts, you can add the aforementioned command to /etc/rc.local.
I didn't delve into adjusting any other PWM setting. In my experience it's not necessary on the Beryl 7, as the fan it's virtually silent if you keep the default values and just change zone 5 trip point temperature, as outlined on my first paragraph.
Thank for good info. In my experience, my device got overheat shutdown one time while transfer data to NAS. It seem like default config not good enought to stop overheat (fan not ramp up). I will look into this and share my experience later.