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Using PoE HAT

The Gigabit Ethernet port (near USB) on ROCK 4B/4B+/4SE supports Power over Ethernet (PoE) with the additional Radxa 23W PoE HAT.

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ROCK 4A/4A+ does not support PoE.

Bill of Materials​

  • As shown below
Radxa 23W PoE HAT

Installation Process​

Please refer to Radxa 23W Power Module

Fan Speed Control​

Enable PoE Overlay​

To enable the temperature-controlled fan and temperature sensor, you need to enable the corresponding overlay.

Please refer to the Device Tree Configuration and enable the overlay named "Enable Radxa 23W PoE HAT".

[*] Enable Radxa 23W PoE HAT

Finally, reboot the device to load the overlay.

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If you cannot find the corresponding overlay in rsetup, please refer to the System Update Guide to update your system first, and then perform the above operations.

Check Temperature Sensor Reading​

After executing the following command, the second line output t=XXYYY shows the current temperature (XX.YYY°C):

cat /sys/bus/w1/devices/28-*/w1_slave