DFRobot Bluno Mega 2560 - an Arduino Mega 2560 with Bluetooth 4.0 Arduino Mega is the high-end series of theArduino controller. DFRduino Mega2560 is based on ATmega2560 control chip as the core, with 54 digital I/O (input/output) ports (of which 14 can be used as PWM output), 16 analog input ports and 4 UART (hardware serial ports), using a 16 MHz crystal oscillator. Embedded bootloader enables the controller to download the program directly via USB without any other external burning device. Multiple ways of power supply can be free to choose, including the USB power supply and universal power adapter and battery for external power supply. Open-sourced software and hardware platform, large interacted community, easy development environment and strong control ability, all together making the Arduino become the most popular electronic product development tool currently. Datasheet and Schematics are shown on this page. Please find Technical Specification and then download documents.