About the Jumper Caps
There are 5 jumper caps on the Main Board, each jumper cap corresponds to a function, if you do not need the function and want to use the pin elsewhere, you can unplug the jumper cap. The following is a detailed explanation of the functions of the five jumper caps.
Cooling Fan (IO6): The fan is always spinning when this jumper cap is unplugged. You can unplug the fan wires or remove the fan if you don’t need it.
IR Receiver (IO13): If you pull out this jumper cap, the IR Receiver will not work.
WS2812 Strip (IO12): If you pull out this jumper cap, the WS2812 Strip will not work.
Shutdown Signal (IO26): The Main board powers on/off depending on the level of the
Stateis low, it powers on, and when
Stateis high, it powers off.
You can only turn off the main board by pressing and holding the power button for 10 seconds if you connect GND and state with a jumper cap.
If you connect
Stateand IO26 with a jumper cap, after configuration, the Raspberry Pi can control the
Statepin through IO26. When Raspberry Pi is on,
Statewill be set to low level, when Raspberry Pi is off,
Statewill be set to high level, so the motherboard and Raspberry Pi can power on/off synchronously.
Power Button (IO16): If you pull out this jumper cap, the power button will not work. Besides, the power button is also used to wake up the OLED screen in Sleep Mode.
Power Cut Memory
When the Pironman suddenly loses power, the chip of the Main Board will record this state and will automatically power on the next time.