ESP8266 Adapter Board

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Esp8266 Module Adapter Board

Note

  • The adapter is a little small, must solder the wifi board onto it carefully.
  • Reset the board after flash
  • From version 2.1, the serial interface is 5V compatible, can use 5V USB-TTL program directly. Old version can work, but can not reach highest speed.
  • Only need power 3V3 GND for power up the module, and TX, RX for serial communication.

Pin Definition, Dimension

adapter board R2 pin definition
Left Side Pins Note Right Side Pins Note
RST Pull-up & Reset-Button TXD
ADC - RXD
EN Pull-up 4
IO16 - 5
IO14 - 0 Pull-up & Flash-Button
IO12 - 2 Pull-up
IO13 - 15 Pull-down
3V3 - GND
CS - CLK
DI - DO
IO09 - IO10
VIN - GND