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ESP8266 Adapter Board - Revision history
2026-06-04T20:00:38Z
Revision history for this page on the wiki
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https://w.electrodragon.com/w/index.php?title=ESP8266_Adapter_Board&diff=26968&oldid=prev
Chao at 08:29, 17 June 2020
2020-06-17T08:29:02Z
<p></p>
<p><b>New page</b></p><div>=== Esp8266 Module Adapter Board ===<br />
==== Note ====<br />
* The adapter is a little small, must solder the wifi board onto it carefully.<br />
* Reset the board after flash<br />
* 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.<br />
* Only need power 3V3 GND for power up the module, and TX, RX for serial communication.<br />
<br />
==== Pin Definition, Dimension ====<br />
<br />
{| class="wikitable sortable" <br />
|+ style="caption-side:top; color:#e76700;"|''adapter board R2 pin definition''<br />
|-<br />
! Left Side Pins !! Note !! Right Side Pins !! Note<br />
|-<br />
| RST || Pull-up & Reset-Button || TXD || <br />
|-<br />
| ADC || - || RXD || <br />
|-<br />
| CHPD | EN || Pull-up || 4 || <br />
|-<br />
| IO16 || - || 5 || <br />
|-<br />
| IO14 || - || 0 || Pull-up & Flash-Button<br />
|-<br />
| IO12 || - || 2 || Pull-up<br />
|-<br />
| IO13 || - || 15 || Pull-down<br />
|-<br />
| 3V3 || - || GND || <br />
|-<br />
| CS || - || CLK || <br />
|-<br />
| DI || - || DO || <br />
|-<br />
| IO09 || - || IO10 || <br />
|-<br />
| VIN || - || GND || <br />
|}<br />
<gallery><br />
File:ESP_adapter_board_R2.png | Pin definition and size, ESP adapter board R2<br />
File:2018-11-25_121547.png | Pin definition and size, ESP adapter board R3<br />
</gallery><br />
<br />
* old pin definition please see this one [[File:ESP_12E_Board_Electrodragon.pdf|link]]<br />
<br />
[[category: ESP8266 HDK]]</div>
Chao