Pins other than USB/serial may be varied
Pin | Signal | Description |
21,22 | Vbat | Charge in |
16 | Vbus | USB +5V |
15 | USB D+ | |
14 | Tx | serial |
13 | Rx | serial |
12 | PWR GND | |
10 | USB D- | |
9 | FF TxD | |
8 | FF RxD | |
6 | Auto PWR | |
1,2,3,4,5,7,11,17, 18,19,20,23,24 |
GND |
R=1k required in serial cable?