The Serial UART interface is available at J5 with the following pinout:
| Board Pin# | Signal | Required |
|---|---|---|
| 1 | DTR | YES |
| 2 | RX | YES |
| 3 | TX | YES |
| 4 | RTS | YES |
| 5 | GND | YES |
For programming, all the pins marked as required must be connected.
Remember to connect RX signal of the board to the RX signal of the programmer (same for TX).
- J2, J3 (China RJ11 connectors) changed with RJ45 (MTJ-881X1)
- new LED and buzzer 12V controll lines added on each RJ45 connector
- J5 programming connector added (68001-420HLF)
- U2, Y1, C4, C5, C6, C7, D1, J1 set to DNP