any of you map what that J1 pins are?I will use the PCB alone to embed and I'd like to solder wires directly to get GND, 5V and TX.
Initially I pulled it apart and found the 7 test points on the left of the board. These turned out to be a serial interface, from top to bottom: 1. ? 2. Ground 3. RTS 4. CTS 5. TXD 6. RXD 7. ? - maybe power in?