Node MCU

What’s a Node MCU?

The Node is an open-source IoT (Internet of Things) platform.

In terms of hardware, it runs an ESP8266 WiFi SoC from Espressif systems.

It comes with 10 GPIOs, and each GPIO can be used for PWM, I2C and 1-wire. It also has 3.3V pins, GND pins, RX, TX, SCLK, MISO, MOSI and so on.

Different versions

ESP8266 LOLIN

ESP8266 Witty

Installing the USB driver

On mac osx yosemite you need to install driver :

1. download and install (http://www.wch.cn/download/CH341SER_MAC_ZIP.html)
2. run `sudo nvram boot-args="kext-dev-mode=1"`
3. Reboot

Arduino IDE setup

Install the Arduino IDE

Download Arduino IDE from Arduino.cc !!! 1.6.4 or greater !!!

Install the ESP8266 Board Package

* Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into Additional Board Manager URLs field in the Arduino v1.6.4+ preferences.

* Use the Board manager to install the ESP8266 package.

Test

Nodemcu Witty

Witty

Wiring

Resources

(https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide) (https://gregwareblog.wordpress.com/2016/01/10/esp-witty/)