DFR0652 Firebeetle Development Board DFRobot DFR0652 Firebeetle Development Board is a small board that contains various chipboards and expansion boards that can be used alone or in combination. The DFR0652 Firebeetle board operates from 3.3V to 5.5V input voltage range. This RF development board adopts the high-performance low-power chip ATSAMD21G18 ARM Cortex M0+. The DFR0652 Firebeetle board offers 32kb RAM and 256kb flash, which is 8 times and 16 times of Atmega328 respectively with up to 48MHz frequency. This development board simplifies the data interaction between the desktop system and the board and supports SPI flash-based easy flash database.