FAN
The FAN interface on the Raspberry Pi Compute Module 4 IO Board only supports fans with a voltage of 12V.
Usage Instructions
Connect
As shown in the figure, connect the fan to the Raspberry Pi Compute Module 4 IO Board.
Rsetup select Thermal Governor mode
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Open a terminal, type rsetup, select Hardware.
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Enter to Thermal governor
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The default governor should be power_allocator.
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power_allocator
The system defaults to fanless mode or DC fan mode. Ensure that the machine can still work stably without a cooling fan
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user_space
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Select user_space
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Locate the fan device with the following command.
ls /sys/class/thermal/cooling_device*/type
cat /sys/class/thermal/cooling_device*/type
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Turn off the fan
echo 0 | sudo tee /sys/class/thermal/cooling_device1/cur_state
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Set the fan to the highest setting.
sudo cp /sys/class/thermal/cooling_device1/max_state /sys/class/thermal/cooling_device1/cur_state
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step_wise
When the CPU temperature reaches 60 degrees Celsius the fan starts to rotate.
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Refer to
- For more information, please refer to the "thermal governor" section in rsetup.