Diagram
Pin
| Pin | Function | ESP-8266 Pin |
|---|---|---|
| TX | TXD | TXD |
| RX | RXD | RXD |
| A0 | Analog input, max 3.3V input | A0 |
| D0 | IO | GPIO16 |
| D1 | IO, SCL | GPIO5 |
| D2 | IO, SDA | GPIO4 |
| D3 | IO,10k Pull-up | GPIO0 |
| D4 | IO, 10k pull-up, BUILTIN_LED | GPIO2 |
| D5 | IO, SCK | GPIO14 |
| D6 | IO, MISO | GPIO12 |
| D7 | IO, MOSI | GPIO13 |
| D8 | IO,10k pull-down, SS | GPIO15 |
| G | Ground | GND |
| 5V | 5V | – |
| 3V3 | 3.3V | 3.3V |
| RST | Reset | RST |
*All IO have interrupt/pwm/I2C/one-wire supported(except D0)
d1 mini shematics (updated schematics):
http://www.wemos.cc/en/latest/_static/files/sch_d1_mini_v3.0.0.pdf
Programming
The D1 mini has a micro USB for auto programming. Also you can programming it using OTA
Warnings
All IO is work at 3.3V.
Source wemos.cc
I’ve got the module from here
WeMos D1 mini pins and diagram
Schematic forgot the Internal LED with resistor on GPIO2.
Reposted a new revision. Thank you.