| Wemos D1 Mini to ESP8266 pinout | |||
|---|---|---|---|
| Wemos D1 mini Pin | Function | ESP-8266 | ESP12 Pin |
| TX | TXD | TXD, GPIO1 | 22 |
| RX | RXD | RXD, GPIO3 | 21 |
| A0 | Analog input, max 3.3V input | A0 | 2 |
| D0 | IO, deepsleep wake-up | GPIO16 | 4 |
| D1 | IO, SCL | GPIO5 | 20 |
| D2 | IO, SDA | GPIO4 | 19 |
| D3 | IO, 10k Pull-up | GPIO0 | 18 |
| D4 | IO, 10k Pull-up, BUILTIN_LED | GPIO2 | 17 |
| D5 | IO, SCK | GPIO14 | 5 |
| D6 | IO, MISO | GPIO12 | 6 |
| D7 | IO, MOSI | GPIO13 | 7 |
| D8 | IO, 10k Pull-down, SS | GPIO15 | 16 |
| G | Ground | GND | 15 |
| 5V | 5V | - | |
| 3V3 | 3.3V | 3.3V | 8 |
| RST | Reset | RST | 1 |