ATSAMR21-LED-Driver (Dimmable) Light

The ATSAMR21-LED-Driver board uses the SAM R21 MCU which is an IEEE® 802.15.4 compliant SiP incorporating an ARM® Cortex® M0+ based 32-bit microcontroller and a 2.4GHz RF transceiver.

The LED driver is implemented in firmware without using any external DC-DC LED driver IC.

This driver is integrated in the BitCloud SDK – The Atmel ZigBee PRO stack that supports the ZigBee Light Link (ZLL) and ZigBee Home Automation (ZHA) Profiles. This solution uses the ZigBee Light Link (ZLL) profile reference application from BitCloud and this can be easily updated to be part of ZigBee Home Automation (ZHA) networks.

The LED driver firmware implements a DC-DC buck converter, operating in boundary conduction mode to provide constant current to the connected LEDs.

The wireless functionality is as defined in the ZLL specification for a dimmable light.