Wemos D1 mini PRO - ESP-8266EX + 16MB flash
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LOLIN Wemos D1 mini PRO - ESP-8266EX + 16MB flash

  • ESP8266-EX 80MHz/160 MHz
  • 16 MBytes Flash
  • 11 digital IO
  • 1 Analog input (3.2V)
  • USB/serial converter.
  • PCB antenna and µFL connector
  • Lipo Charger (500 mA max)
  • Version 2.0.0
€11.37 (tax incl.) €9.40 (tax excl.)
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Development IoT with Wemos Mini D1 PRO - ESP8266 with 16Mb Flash

The Wemos D1 mini PRO is an improved version of the popular ESP8266 development plateforme that can be programmed with Arduino IDE, NodeMCU (lua script) for ESP8266. Notice that MicroPython is not supported by Wemos.cc for this plateform!

This is the lastest version of D1 Mini PRO (v2.0.0) offering the latests features:

  • A resettable fuse of 500mA
  • CH340 serial communication
  • Lipo Charger
  • I2C connector
  • An optimized antenna circuit.

The Key advantage of the Wemos Plateform is to offers a lot of shield and add-ons and it also support the famous NeoPixel (smart RGB Led) for create smart display and animation.

The plateforme offers 11 digital I/O and 1 analog output. The Wemos is the only plateform supporting a 3.3V input voltage the analog input (thank to the voltage resistor divider placed on the 1V max analog input of the ESP8266).

This ESP8266 plateform brings 16 Mbytes Flash and a brand new CP2104 USB to serial converter (as used by many manufacturer on their product). As the USB-to-Serial converter handles the DTR and RTS signal, there is no need for extra button to handle the bootloading activation on GPIO0 :-)

The power supply 5v to 3.3v is handled by the RT9013 ultra-low drop out regulator and low noise offering an output current of 500mA max which leave a room of ~200 to 250mA for your own project as the ESP8266 use from 40mA-80mA to 250mA while communicating over the WiFi. 

For learning purpose only

This product is only made available for learning and discovery purpose.

Technical specification

  • Microcontroler: ESP-8266EX
  • Operating voltage: 3.3V
  • Power supply voltage: 5V via microUSB
  • Digital I/O: 11 broches, 3.3V max.
  • Analog input: 1
    • Max input: 3.2V
    • Use a resistor voltage divider to tolerate up to 3.3V.
  • Extra Functions:
    • PWM: all pins except D0
    • Interrupt: all pin except D0
    • I2C: Software/Bit Banging I2C. All pin except D0.
    • One-Wire:All pins except D0.
    • SPI: hardware SPI (see pinout description here under)
  • Clock Speed: 80MHz/160MHz
  • External Flash Memory: 16M bytes
  • Internal Voltage regulator: RT9013 5v to 3.3V, 500mA max.
    200 to 250mA available for the project.
  • Builtin LED on D4
  • Length: 48.0mm
  • Width: 25.4mm
  • Weight: 4.5g


The Wemos D1 Mini PRO + normal header set + femalle header set + stacking header set.

Wemos Pinout

PinFunctionESP-8266 pin
TX Serial data, Emitter pin TXD TXD
RX Serial data, Receiver pin RXD RXD
A0 Analog input, max 3.3V (via voltage divider) A0
16 IO GPIO16
5 IO, SCL - I2C bus clock signal GPIO5
4 IO, SDA - I2C bus data signal GPIO4
0 IO, 10k pull up-resistor GPIO0
2 IO, 10k pull up-resistor,
BUILTIN_LED (set LOW to light).
15 IO, 10k pull up-resistor, SPI SS GPIO15
G Ground GND
5V 5V power, wired to the 3.3V regultator (aucun)
3V3 3.3V regulator output 3.3V
RST Reset. Set to LOW to reset. RST


Data sheet
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