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Arduino Killer ESP8266 Based NodeMCU The ESP8266 WiFi Module is an embedded SOC with integrated TCP/IP protocol stack. It helps   microcontrollers  access to your WiFi network. IoT devices exploits this facility. Lot of firmwire you can use with ESP8266. Many ESP8266 comes with AT firmware for serial communications. NodeMCU is one of them, which supports lua programming language. Latest ESP8266 boards contains plenty of I/O lines and ADC,PWM, I2C,SPI  features like Arduino. It is very cheap($3-Rs.180) All of the above board build with ESP8266. Almost all are same.

Arduino Project UltraSonic Sensor to Control RGB LED Light Arduino Project : UltraSonic Motion Sensor to Control LED Light This is a simple Arduino project that will smoothly light up a RGB LED light when a Ping))) UltraSonic motion sensor detects an object in front of it. The LED light will stay at its highest brightness (RGB color) as long the object stays in front of the UltraSonic sensor, or else it will smoothly fade out and go back to its off state. Since the UltraSonic range finder can measure the distance of an object that is front of it�s sensor, it is possible to set a distance (in centimeter or inch) range to fire up the LED light in this project. UltraSonic Sensor LED Light Controller Project Requires: 1 Arduino Board 1 Ping))) UltraSonic Sensor 1 RGB LED light 3 Resistors of 330 Ohms - 0.25W Jumper wires and Bread Board for connection Here is the project circuit   RGB LED light has 4 pins, one anode and three cathode. The longest of the four lead...

Architecture of Open Hardware for Rapid prototyping for Raspberry PI BeagleBone Black Arduino Tre Hello All, You can download ppt of  Architecture of Open Hardware for Rapid prototyping: for Raspberry PI, BeagleBone Black & Arduino Tre You can find various specification of all hardware. Link For Download http://www.slideshare.net/DhavalKaneria/open-source-hardware-34995132

Arduino NodeMcu ESP8266 Pin Mapping    Arduino NodeMcu (ESP8266) Pin Mapping    If you use NodeMcu borad with Arduino IDE the following chart will help to find the pin maping eg. NodeMCU Pin D1 is equivalent to arduino Pin 5.  Built in LED of NodeMCU is connected to D4 in arduino programming it equivalent to Pin 2   NodeMCU Arduino D0 = 16 D1 = 5 D2 = 4 D3 = 0 D4 = 2 D5 = 14 D6 = 12 D7 = 13 D8 = 15 D9 = 3 D10 = 1