When you run out of pins - driving several displays, a keypad matrix and a fistful of sensors at once - this is the board you move to. Same toolchain and libraries as the Uno, roughly four times the I/O and eight times the flash.
Specifications
| Microcontroller | ATmega2560 |
| Clock speed | 16 MHz |
| Digital I/O | 54 (15 PWM) |
| Analog inputs | 16 |
| Flash / SRAM / EEPROM | 256 KB / 8 KB / 4 KB |
| Hardware serial ports | 4 |
| Operating voltage | 5 V |
