| Pin Number |
Pin Name |
Direction | Pin Number |
Pin Name |
Description (may be empty) |
| not used | |||||
| 2 | Rx | 3 | Tx | ||
| 3 | Tx | 2 | Rx | ||
| not used | |||||
| 5 | GND | 5 | GND | ||
| not used | |||||
| not used | |||||
| not used | |||||
| not used |
The absolute bare minimum: just Rx, Tx, and GND. No hardware flow control whatsoever.

