DFRobot DFR0654 FireBeetle ESP32-E IoT Microcontroller is specially designed for IoT, is an ESP-WROOM-32E-based main controller board with dual-core chips. This MCU supports WiFi and Bluetooth® dual-mode communication, and features small size, ultra-low power consumption, on-board charging circuit and easy-to-use interface. The FireBeetle ESP32-E supports Arduino programming and will support Scratch graphical programming and MicroPython programming. This ESP32-E IoT microcontroller operates at 3.3V supply voltage.