JTAG header for the ESP32 module. The pinout is the same as as the ESP-Prog
| Pin | ESP Pin | ESP Port | Description |
|---|---|---|---|
| 1 | +3v3 | ||
| 2 | 13 | GPIO14 | JTAG TMS |
| 3 | GND | ||
| 4 | 16 | GPIO13 | JTAG TCK |
| 5 | GND | ||
| 6 | 23 | GPIO15 | JTAG TDO |
| 7 | GND | ||
| 8 | 14 | GPIO12 | JTAG TDI |
| 9 | GND | ||
| 10 | 3 | EN |
Power supply
| Pin | Description |
|---|---|
| 1 | +5v |
| 2 | +3v3 |
| 3 | GND |
ESP32 Serial programming interface. Note that pin 6 is 5 volt, not 3.3 volt.
| Pin | ESP Pin | ESP Port |
|---|---|---|
| 1 | 25 | GPIO0 |
| 2 | 3 | EN |
| 3 | GND | |
| 4 | 35 | TX |
| 5 | 34 | RX |
| 6 | +5v |
JTAG interface to the MGM111 module
| Pin | ESP Pin | MGM111 Pin | Description |
|---|---|---|---|
| 1 | GPIO21 | ESP RX | |
| 2 | GPIO22 | ESP TX | |
| 3 | GND |