Fan Setting
Installation
Heatsink 4012 is a customized cooling fan for ROCK 5B, the installation tutorial is shown in the picture:
- Apply the thermal silicone to the heat sink;
- Apply thermal silicone to the chip;
- Align the snap with the exposed copper area of the ROCK 5B and press it down;
- Connecting the power cord is complete.
Configure
There are three modes by default:
- power_allocator: The system defaults to fanless mode or DC fan mode. Ensure that the machine can still work stably without a cooling fan;
- user_space: Manual control of the cooling fan mode. Users can control the speed of the cooling fan through the command terminal according to their needs;
- step_wise: Automatic Temperature Adjustment Mode: The cooling fan is dormant when the CPU is below 60 degrees Celsius, and starts to work when the CPU reaches above 60 degrees Celsius. NOTE: The cooling fan will not operate when the ROCK 5B is in the power off and sleep states.
You can select the mode from the command terminal rsetup -> Hardware -> Thermal governor by using the space bar as follows:
Simultaneously press Ctrl + Alt + T to open the terminal and run the rsetup command as follows:
radxa@rock-5b:~$ rsetup
Enter the password and select Hardware to access the hardware console interface:
Please select an option below:
System Maintenance
Hardware
Overlays
Connectivity
User Settings
Localization
About
<Ok> <Cancel>
Press and enter Thermal governor
Manage on-board hardware:
Video capture devices
GPIO LEDs
Thermal governor
Configure DSI display mirroring
<Ok> <Cancel>
Selection of modes with the `spacebar'
┌─────────────────────────────────────────┤ RSETUP ├───────────────────────────────────────────────┐
│ Please select the thermal governor. │
│ Recommendation: fanless or DC fan => power_allocator | PWM fan => step_wise │
│ │
│ (*) power_allocator │
│ ( ) user_space │
│ ( ) step_wise │
│ ( ) fair_share │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ <ok> <Cancel> │
└──────────────────────────────────────────────────────────────────────────────────────────────────│
If you are in user_space mode, you need to control the cooling fan manually.
First, you need to find the fan device node pwm-fan.
cat /sys/class/thermal/cooling_device*/type
As an example, this cooling fan is mounted on cooling_device1, which you will see by cat /sys/class/thermal/cooling_device1/type to pwm-fan:
radxa@rock-5b: cat /sys/class/thermal/cooling_device1/type
pwm-fan
Note: The following operation is based on cooling_device1 as an example.
Directly turn on the cooling fan maximum speed: ``
radxa@rock-5b:~$ sudo cp /sys/class/thermal/cooling_device1/max_state /sys/class/thermal/cooling_device1/cur_state
You can see how many RPMs the cooling fan supports with the following command:
radxa@rock-5b:~$ cat /sys/class/thermal/cooling_device1/max_state
4
To select the third speed, follow these instructions:
echo 3 | sudo tee /sys/class/thermal/cooling_device1/cur_state
If you want to use other speed gears, just change the numbers. If you want to turn off the cooling fan, select 0 for the speed slot.
echo 0 | sudo tee /sys/class/thermal/cooling_device1/cur_state