Merge pull request #660 from lcafaro/esp8266

Added MOD-WIFI-ESP8266-DEV

Author: igrr

doc/boards.md

@@ -5,6 +5,7 @@ title: Supported Hardware
 - [Adafruit HUZZAH ESP8266 (ESP-12)](#adafruit-huzzah-esp8266-esp-12)
 - [NodeMCU 0.9](#nodemcu-0-9)
 - [NodeMCU 1.0](#nodemcu-1-0)
+- [Olimex MOD-WIFI-ESP8266-DEV](#olimex-mod-wifi-esp8266-dev)
 - [Olimex MOD-WIFI-ESP8266](#olimex-mod-wifi-esp8266)
 - [SparkFun ESP8266 Thing](#sparkfun-esp8266-thing)
 - [SweetPea ESP-210](#sweetpea-esp-210)
@@ -40,9 +41,23 @@ If you want to use NodeMCU pin 5, use D5 for pin number, and it will be translat
 
 *TODO: add notes*
 
+### Olimex MOD-WIFI-ESP8266-DEV
+
+This board comes with 2 MB of SPI flash and optional accessories (e.g. evaluation board ESP8266-EVB or BAT-BOX for batteries).
+
+The basic module has three solder jumpers that allow you to switch the operating mode between SDIO, UART and FLASH.
+
+The board is shipped for FLASH operation mode, with jumpers TD0JP=0, IO0JP=1, IO2JP=1.
+
+Since jumper IO0JP is tied to GPIO0, which is PIN 21, you'll have to ground it before programming with a USB to serial adapter and reset the board by power cycling it.
+
+UART pins for programming and serial I/O are GPIO1 (TXD, pin 3) and GPIO3 (RXD, pin 4).
+
+Get the board schematics [here](https://github.com/OLIMEX/ESP8266/blob/master/HARDWARE/MOD-WIFI-ESP8266-DEV/MOD-WIFI-ESP8266-DEV_schematic.pdf)
+
 ### Olimex MOD-WIFI-ESP8266
 
-*TODO: add notes*
+This is a stripped down version of the above. Behaves identically in terms of jumpers but has less pins readily available for I/O. Still 2 MB of SPI flash.
 
 ### SparkFun ESP8266 Thing ###