The DFRobot FireBeetle series is designed for IoT projects, offering efficient and low-power microcontroller boards. The FireBeetle Board - ESP32 features a dual-core ESP-WROOM-32 module that supports MCU functions along with dual-mode Wi-Fi and Bluetooth communication. It excels in power efficiency, with a deep-sleep mode current consumption as low as 10µA. The board supports flexible power options, allowing it to be powered via USB or a 3.7V external lithium battery. Additionally, both USB and external DC sources can directly charge the connected LiPo battery, enhancing convenience for portable IoT applications.