Thursday, June 23, 2016

WeMos D1 R2 WiFi uno based ESP8266

The D1 R2 is a mini wifi board based on the ESP-8266EX.
  • 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except for D0)
  • 1 analog input(3.2V max input)
  • Micro USB connection
  • Power jack, 9-24V power input.
  • Compatible with Arduino  (https://github.com/esp8266/Arduino)
  • Compatible with nodemcu


Tech Specs:

  • Microcontroller ESP-8266EX
  • Operating Voltage 3.3V
  • Digital I/O Pins 11
  • Analog Input Pins 1(Max input: 3.2V)
  • Clock Speed 80MHz/160MHz
  • Flash 4M bytes
  • Length 68.6mm
  • Width 53.4mm
  • Weight 25g


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 of the IO pins have interrupt/pwm/I2C/one-wire support except D0

Programming:

The D1 R2 has a micro USB for auto programming.
Also you can programming it using OTA

Warnings:

All IO is work at 3.3V.