
The tiny Arduino IDE ready, usb and mobile dev board
and ecosystem - cheap enough to leave in any project! Wi-fi, BLE, and
25+ shields!
Serial over USB debugging, USB programmable, 14 i/o, SPI,
I2C, UART, USB Device Emulation, Mobile Development Ready, Optional BT,
BLE, Mesh, and Wi-Fi.
The super small, dirt cheap,
always...