Non blocking ESP8266 Arduino Library for simple http communication based on https://github.com/itead/ITEADLIB_Arduino_ESP8266
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README.md

README.md

Arduino ESP8266 HTTP Client library

by Igor Makowski (igor.makowski@gmail.com)

Library for simple http communication with webserver. Library does not block work of your program (no delay() is used!), does not use memory-expensive String lib and handles most of ESP8266 errors by itself. Just set handlers, connect to AP and play with it. Ideal for JSON based applications (tested with ArduinoJson library).

Library has internal static buffer for async data recive from ESP8266. You will need to set size of this buffer according to your needs (but keep in mind that only http header can be longer than 300 characters).

Bug reports and push request are welcomed :)

Based on work by Stan Lee(Lizq@iteadstudio.com).

Topic: http://www.esp8266.com/viewtopic.php?f=8&t=1205

Instructions

Library was developed with ESP8266 firmware v0.20. Older versions of firmware might not work with this lib.

After some tests it looks like there's some problems with Software Serial (and alternatives) and ESP8266, so I strongly reccomend connecting ESP8266 to Hardware Serial (if you have UNO you will need FTDI for debug).

UNO connection example, LM317T is used as voltage regulator in this case. FTDI connectior included.

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MEGA connection example, LM317T is used as voltage regulator in this case.

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How to connect to PC and update (firmware is included in lib files) your ESP8266 is explained in this video:

https://www.youtube.com/watch?v=9QZkCQSHnko

For best performance you will need connect not only 3.3V, GND, TX and RX, but also RST pin on your ESP8266. It is not required.

Header file (.h) needs to be edited according to your hardware specs. If you have UNO board uncomment "define UNO" (board with only one hardware serial). In case you are using MEGA board uncomment "define MEGA" line. Also setup desired buffer size.

Take a look at example sketch included in this lib. Yes, using this lib is that simple.

License

The MIT License (MIT)

Copyright (c) 2015 Igor Makowski

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.