Manual: GPIO useful pinouts - emelianov/ehcontrol3 GitHub Wiki
NodeMCU 1.0
| PIN | GPIO | Function |
|---|---|---|
| D0 | 16 | MCU LED / RESET |
| D1 | 5 | I2C SDL |
| D2 | 4 | I2C SDA |
| D3 | 0 | |
| D4 | 2 | ESP LED |
| D5 | 14 | SPI CLK |
| D6 | 12 | SPI MISO |
| D7 | 13 | SPI MOSI / alt RX |
| D8 | 15 | SPI SS / alt TX |
| D9 | 3 | RX / I2S |
| D10 | 1 | TX |
| D11 | 9 | |
| D12 | 10 |
LCD I2C to GPIO board
| PIN | GPIO |
|---|---|
| 1 | GRND |
| 2 | + |
| 3 | + (Contrast) |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | nc |
| 8 | nc |
| 9 | nc |
| 10 | nc |
| 11 | 4 |
| 12 | 5 |
| 13 | 6 |
| 14 | 7 |
| 15 | + (Backlight) |
| 16 | GRND |