update nodemcu version in README.md, build.md, flash.md
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# **NodeMCU 2.1.0** #
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# **NodeMCU 2.2.0** #
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[![Join the chat at https://gitter.im/nodemcu/nodemcu-firmware](https://img.shields.io/gitter/room/badges/shields.svg)](https://gitter.im/nodemcu/nodemcu-firmware?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[![Build Status](https://travis-ci.org/nodemcu/nodemcu-firmware.svg)](https://travis-ci.org/nodemcu/nodemcu-firmware)
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### A Lua based firmware for ESP8266 WiFi SOC
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NodeMCU is an [eLua](http://www.eluaproject.net/) based firmware for the [ESP8266 WiFi SOC from Espressif](http://espressif.com/en/products/esp8266/). The firmware is based on the [Espressif NON-OS SDK 2.1.0](https://github.com/espressif/ESP8266_NONOS_SDK/releases/tag/v2.1.0) and uses a file system based on [spiffs](https://github.com/pellepl/spiffs). The code repository consists of 98.1% C-code that glues the thin Lua veneer to the SDK.
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NodeMCU is an [eLua](http://www.eluaproject.net/) based firmware for the [ESP8266 WiFi SOC from Espressif](http://espressif.com/en/products/esp8266/). The firmware is based on the [Espressif NON-OS SDK 2.2.0](https://github.com/espressif/ESP8266_NONOS_SDK/releases/tag/v2.2.0) and uses a file system based on [spiffs](https://github.com/pellepl/spiffs). The code repository consists of 98.1% C-code that glues the thin Lua veneer to the SDK.
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The NodeMCU *firmware* is a companion project to the popular [NodeMCU dev kits](https://github.com/nodemcu/nodemcu-devkit-v1.0), ready-made open source development boards with ESP8266-12E chips.
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@ -75,7 +75,7 @@ make EXTRA_CCFLAGS="-DLUA_NUMBER_INTEGRAL ....
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Identify your firmware builds by editing `app/include/user_version.h`
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```c
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#define NODE_VERSION "NodeMCU 2.1.0+myname"
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#define NODE_VERSION "NodeMCU " ESP_SDK_VERSION_STRING "." NODE_VERSION_XSTR(NODE_VERSION_INTERNAL)
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#ifndef BUILD_DATE
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#define BUILD_DATE "YYYYMMDD"
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#endif
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@ -102,7 +102,7 @@ Espressif refers to this area as "System Param" and it resides in the last four
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The default init data is provided as part of the SDK in the file `esp_init_data_default.bin`. NodeMCU will automatically flash this file to the right place on first boot if the sector appears to be empty.
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If you need to customize init data then first download the [Espressif SDK 2.1.0](https://github.com/espressif/ESP8266_NONOS_SDK/archive/v2.1.0.zip) and extract `esp_init_data_default.bin`. Then flash that file just like you'd flash the firmware. The correct address for the init data depends on the capacity of the flash chip.
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If you need to customize init data then first download the [Espressif SDK 2.2.0](https://github.com/espressif/ESP8266_NONOS_SDK/archive/v2.2.0.zip) and extract `esp_init_data_default.bin`. Then flash that file just like you'd flash the firmware. The correct address for the init data depends on the capacity of the flash chip.
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- `0x7c000` for 512 kB, modules like most ESP-01, -03, -07 etc.
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- `0xfc000` for 1 MB, modules like ESP8285, PSF-A85, some ESP-01, -03 etc.
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