Active Cooler Control

2025-12-10

This chapter mainly introduces the detailed usage of the active-cooler, including the installation and connection of the cooling fan, functional usage, etc., to help users quickly master the correct usage of the active-cooler.

Quick Start

First, insert the cooling fan's cable into the FAN slot of the single-board computer, and then fix both ends of the active-cooler into the reserved holes on the single-board computer as shown below:

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Connect the USB-A power cable by inserting the USB-A end into the power adapter and the USB-C end into the power port of the single-board computer (usually marked POWER IN).

Functional Usage

Speed Setting

  • Switch to root user

Enter the following command in the terminal to switch to the root user. The default password for the root user is quecpi.

sudo su
  • Set speed

Enter the following command in the terminal to set the fan speed.

echo value > /sys/class/leds/fanfan/brightness  #value ranges from 0-512