Orange Pi R1 Plus LTS (RK3328) - IO pins

I count 13 pins, all in a single row, and happily on 0.1 inch centers.

Notice in the diagram below, a connector near the console pins. This is some kind of tiny obscure connector that I have never seen before. The user manual labels it as a fan connector.

• 1 - VCC (5 volts)
• 2 - GND
• 3 - GPIO2-D1 TWI0-SDA
• 4 - GPIO2-D0 TWI0-SCK
• 5 - GPIO3-A4 Uart1-Tx
• 6 - GPIO3-A6 Uart1-Rx
• 7 - Lineout R
• 8 - Lineout L
• 9 - TV out
• 10 - GPIO3-C0
• 11 - GPIO3-A7 Uart1-CTS
• 12 - GPIO3-A5 Uart1-RTS
• 13 - GPIO2-A2 IR-Rx

The user manual describes an optional expansion board that connects to the 13 pin IO header. It offers an audio jack and a place for the IR signal (which is an input that the Android software may use). It also offers two USB ports and a microphone, but then tells you that they are not supported (which is not surprising since I don't see any signals among the 13 listed above that could support these).