D1 Mini R2
Wemos site
Chip: ESP-8266EX
Pins compatible with Nodemcu v0.9
Clock speed: 80MHz/160MHz
Flash size: 4MB bytes
Length: 34.2mm
Width: 25.6mm
Weight: 3g
CH340 USB to serial chip
Notes:
D1 Mini R1 has other pin layout
D1 Mini Pro has more memory (16M)
AliExpress ModuleFans
AliExpress Win win.
| Pin | Function | ESP-8266 Pin | Remarks |
|---|---|---|---|
| RST | Reset | RST | |
| A0 | Analog input, max 3.3V input | A0 | |
| D0 | IO | GPIO16 | To use deepsleep connect with RST |
| D5 | IO, SCK | GPIO14 | |
| D6 | IO, MISO | GPIO12 | |
| D7 | IO, MOSI | GPIO13 | |
| D8 | IO, 10k Pull-down, SS | GPIO15 | |
| 3V3 | 3.3V | 3.3V | |
| TX | TXD | TXD | |
| RX | RXD | RXD | |
| D1 | IO, SCL | GPIO5 | |
| D2 | IO, SDA | GPIO4 | |
| D3 | IO, 10k Pull-up | GPIO0 | |
| D4 | IO, 10k Pull-up, BUILTIN_LED | GPIO2 | Low=LED ON |
| G | Ground | GND | |
| 5V | 5V | - |