How to Configure Fan Speed (Active Cooler) via Command Console

✨ Quick Answer

Modern development boards and Mini PCs (such as the Raspberry Pi 5) offer incredible performance, but dissipate a lot of heat when running heavy Docker services or media servers. The use of an Active Cooler (active heatsink with fan) is mandatory to prevent thermal throttling (automatic power reduction due to excess temperature).

Quick Diagnostics

Cause

PWM fan control overlay not enabled in config.txt

Solution

Add dtparam=fan_temp0=60000 in /boot/firmware/config.txt

Cause

Thermal monitoring service inactive

Solution

Adjust thermal thresholds in raspi-config or check JST connector

Modern development boards and Mini PCs (such as the Raspberry Pi 5) offer incredible performance, but dissipate a lot of heat when running heavy Docker services or media servers. The use of an Active Cooler (active heatsink with fan) is mandatory to prevent thermal throttling (automatic power reduction due to excess temperature).

By default, the operating system manages the fan automatically, but often the factory thresholds are very high, allowing the board to reach 60°C before turning on the air, shortening the life of the hardware.

Step-by-Step Solution

1. 1

   Step 1: Verificar la temperatura actual por consola

   Open the terminal of your Linux-based operating system and run the following command to know the exact processor temperature in real time:

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   vcgencmd measure_temp
   

2. 2

   Step 2: Editar el archivo de configuración de arranque

   On systems based on Raspberry Pi OS, we can modify the activation parameters by editing the config.txt file. Open the editor with administrator privileges:

   BASH Copy

   sudo nano /boot/firmware/config.txt
   

   (Nota: En versiones antiguas de sistemas operativos, la ruta puede ser simplemente /boot/config.txt).

3. 3

   Step 3: Definir los nuevos umbrales de temperatura (Cooling Trip Points)

   Scroll to the end of the file and add the following lines to customize the exact degrees at which the fan will change speed (the values correspond to millidegrees Celsius, for example 50000 is equivalent to 50°C):

   PLAINTEXT Copy

   # Ajuste personalizado del Active Cooler
   dtparam=fan_temp0=45000
   dtparam=fan_temp0_hyst=5000
   dtparam=fan_temp1=52000
   dtparam=fan_temp1_hyst=5000
   dtparam=fan_temp2=60000
   dtparam=fan_temp2_hyst=5000
   

   Save the file by pressing Ctrl + O, confirm with Enter and exit with Ctrl + X.

4. 4

   Step 4: Reiniciar el sistema

   To apply hardware changes in the internal configuration tables, perform a clean reboot:

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   sudo reboot