How to installation

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Product Link :)"http://amzn.in/iGrhIwK"



URL:) "http://arduino.esp8266.com/versions/2.4.1/package_esp8266com_index.json"



NodeMCU was created shortly after the ESP8266 came out. On December 30, 2013, Espressif Systems[6] began production of the ESP8266.[10] The ESP8266 is a Wi-Fi SoC integrated with a Tensilica Xtensa LX106 core,[citation needed] widely used in IoT applications (see related projects). NodeMCU started on 13 Oct 2014, when Hong committed the first file of nodemcu-firmware to GitHub.[11] Two months later, the project expanded to include an open-hardware platform when developer Huang R committed the gerber file of an ESP8266 board, named devkit v0.9.[12] Later that month, Tuan PM ported MQTT client library from Contiki to the ESP8266 SoC platform,[13] and committed to NodeMCU project, then NodeMCU was able to support the MQTT IoT protocol, using Lua to access the MQTT broker. Another important update was made on 30 Jan 2015, when Devsaurus ported the u8glib[14] to NodeMCU project,[15] enabling NodeMCU to easily drive LCD, Screen, OLED, even VGA displays.
In summer 2015 the creators abandoned the firmware project and a group of independent but dedicated contributors took over. By summer 2016 the NodeMCU included more than 40 different modules. Due to resource constraints users need to select the modules relevant for their project and build a firmware tailored to their needs.

Related projects[edit]

ESP8266 Arduino Core[edit]

As Arduino.cc began developing new MCU boards based on non-AVR processors like the ARM/SAM MCU and used in the Arduino Due, they needed to modify the Arduino IDE so that it would be relatively easy to change the IDE to support alternate tool chains to allow Arduino C/C++ to be compiled down to these new processors. They did this with the introduction of the Board Manager and the SAM Core. A "core" is the collection of software components required by the Board Manager and the Arduino IDE to compile an Arduino C/C++ source file down to the target MCU's machine language. Some creative ESP8266 enthusiasts have developed an Arduino core for the ESP8266 WiFi SoC that is available at the GitHub ESP8266 Core webpage. This is what is popularly called the "ESP8266 Core for the Arduino IDE" and it has become one of the leading software development platforms for the various ESP8266 based modules and development boards, including NodeMCUs.

Pins of NodeMCU[edit]

NodeMCU provides access to the GPIO (General Purpose Input/Output) and for developing purposes below pin mapping table from the API documentation should be referenced.
IO indexESP8266 pinIO indexESP8266 pin
0 [*]GPIO167GPIO13
1GPIO58GPIO15
2GPIO49GPIO3
3GPIO010GPIO1
4GPIO211GPIO9
5GPIO1412GPIO10
6GPIO12

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