The Arduino Mega 2560, while slightly less well known, is the Uno’s bigger, faster brother. With all the capabilities of four Uno boards combined, the Arduino Mega 2560 is a beefy microcontroller board based around the powerful ATmega2560 microprocessor, and is capable of almost anything you can throw at it.
![Mega Mega](https://www.electroschematics.com/wp-content/uploads/2013/01/Arduino-Mega-2560-Pinout.jpg)
Here, we have a comparison between the Mega Arduino with the integrated ESP (Arduino Mega RobotDyn) and the traditional Mega Arduino (Arduino Mega 2560). We can see that they are similar, but in the 2560, we have the USB printer, which is a large connector. However, in the RobotDyn, we have the mini-USB. I particularly like the more compact option, but the power is the same in both.
We can see, then, that the intention of the RobotDyn creaters was to maintain the architecture of the ATmega.
As we see in the table above, the ATmega has 32MB of memory, not counting the ESP memory. This is wonderful, since the traditional Mega Arduino has only 256kb of memory. The power in the RobotDyn is 7 to 12 volts, and the ESP8266 is already powered, and already has a voltage reducer. So, feeding the Arduino is already feeding the ESP, which is already down to 3v3, and internally that microcontroller is already 3v3.
The processors are the same, 16MHz, and one great advantage of these models is the high amount of IOs.
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