FireBeetle ESP8266 IoT MCU DFRobot FireBeetle ESP8266 IoT MCU is a series of low-power-consumption development hardware designed for the Internet of Things (IoT). This development board combined IoT WiFi, TCP/IP, 32-bit MCU, and 10-bit ADC. The ESP8266 development board is integrated with multiple interfaces such as HSPI, UART, PWM, I2C, and I2S. This FireBeetle board comes with 16MB outer SPI flash memory and ESP8266 which is available for programs and firmware storage. The development board is compatible with Arduino IDE, which enables Firebeetle ESP8266 to lower the programming barrier. This Arduino IDE is implemented directly onto ESP8266 to reduce the difficulty of the operation and increase the stability of the board.