LOLIN(WEMOS) D1 R2 & mini

LOLIN(WEMOS) D1 R2 & mini

The Wemos Mini is a small ESP-8266 based wifi board.


11 digital io pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)

1 analog input(3.2V max input)

a Micro USB connection

Compatible with Arduino and nodemcu

Manufacturer(s) Lolin
Used chip ESP8266EX
Flash 4 (MB)
Total nr of pins 16
Programmable pins 12
Antenna PCB Antenna
Module ESP-12F

Added by

Other contributors (3)

Onno Dirkzwager

2021-01-13 15:33:44
Updated pins_total

Onno Dirkzwager

2021-01-13 15:33:44
Updated pins_prog

Onno Dirkzwager

2021-01-13 15:32:56
Updated text

Used module(s)


ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host t...

Used chip


ESP8266EX has 17 GPIO pins which can be assigned to various functions by programming the appropriate registers. Each GPIO can be configured with internal pull-up or pull-down,...

Arduino board settings

Board name:
LOLIN(WEMOS) D1 R2 & mini

Flash size:
  • 4MB (32Mb)

Partition scheme:
  • 4MB (SPIFFS(FS) 2MB OTA:~1019KB)
  • 4MB (SPIFFS(FS) 3MB OTA:~512KB)
  • 4MB (SPIFFS(FS) 1MB OTA:~1019KB)