Hirose DF13 at 1.25mm pitch is the standard connector in the early Pixhawk and APM autopilot ecosystem for GPS, telemetry, and UART peripherals.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | VCC | Power supply | PWR |
| 2 | TX | UART transmit | BUS |
| 3 | RX | UART receive | BUS |
| 4 | GND | Ground | GND |