NodeMcu is a tiny board, based on ESP8266, integates GPIO, PWM, IIC, 1-Wire and ADC all in one board. It’s a lua based firmware for wifi-soc esp8266

• Build on ESP8266 sdk
• Lua core based on eLua project
• cjson based on lua-cjson
• File system based on spiffs
• Easy to access wireless router
• Based on Lua 5.1.4 (without debug, os module.)
• Event-Drive programming preferred.
• Build-in json, file, timer, pwm, i2c, spi, 1-wire, net, mqtt, coap, gpio, wifi, adc, uart and system api.
• GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
• Both Integer version(less memory usage) and Float version(Default) firmware provided.