Duinotech MEGA r3 development board with an integrated ESP8266 is an Arduino®-Compatible board which makes it easy to connect your projects to the cloud without the need for additional shields. Features the ATMega2560 and standard MEGA layout, and includes a set of DIP switches to configure the serial connections. It boasts more IO pins, more memory, more PWM outputs, more analog inputs and more serial ports than the UNO board. When you have a project that just needs more inputs, outputs and memory than the Duinotech Classic (UNO) can deliver, the MEGA has them in spades. And with 8 times the program memory, you have the room to write much larger programs to take full advantage of the increased IO. Despite its elongated size, standard shields will still drop straight onto this board.

The co-ax connector by the DC Power jack can be used to run an external antenna.

Uses a Micro-B USB lead such as WC7723 for connecting to the computer and uploading sketches. You can read more about it in the manual.

Please note: 

• To talk to board you need to download and install CH340 Driver (search for driver on the net).

• You must upload code to both processors then configure the switches for them to talk to each other.