D1 mini Pro is a wifi board with 16MB flash, external antenna connector and built-in ceramic antenna based on ESP-8266EX

Features:

    • 11 digital input/output pins
    • Interrupt/pwm/I2C/one-wire
    • 1 analog input(3.2V max input)
    • 16M bytes(128M bit) Flash
    • External antenna connector
    • Built-in ceramic antenna
    • New CP2104 USB-TO-UART IC
    • Same size as D1 mini, but more light

       

Pinout D1 mini Pro

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

Board schematics

If you want to enable external antenna, you must change the position of the zero ohm resistor (R16 from the schematics), see the red line in the picture

 

Sources:

https://wiki.wemos.cc/products:d1:d1_mini_pro

http://hobbycomponents.com/development-boards/864-wemos-d1-mini-pro-esp8266-development-board

http://raspi.tv/2017/how-to-use-external-antenna-on-wemos-d1-mini-pro-surface-mount-rework-video

 

I’ve got the module from here WEMOS D1 Mini Pro – 16M Bytes External Antenna Connector ESP8266 WIFI IoT Board

 

 

Wemos D1 mini Pro
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