J1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
TXD | RXD | CTS | RTS | RESET | SETUP | PROTECT | 5V | GND | |
J2 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
TX | RX | TPIN+ | TPIN- | LD | HD | NC | NC | |