Communication
The Leonardo the Esplora has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega32U4 provides serial (CDC) communication over USB and appears as a virtual com port to software on the computer. The chip also acts as a full speed USB 2.0 device, using standard USB COM drivers. On Windows, a .inf file is required. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The RX and TX LEDs on the board will flash when data is being transmitted via the USB connection to the computer.
The ATmega32U4 also supports SPI communication, that can be accessed through the SPI library.
The Esplora can appear as a generic keyboard and mouse, and can be programmed to control these input devices using the Keyboard and Mouse libraries.