DFR0575 Beetle Series ESP32 Microcontroller DFRobot DFR0575 Beetle Series ESP32 Microcontroller lets users burn programs directly via the onboard USB interface. Bluetooth® and WiFi® are integrated into the device to support more applications. The Beetle ESP32 is a simplified version of FireBeetle-ESP32. The Beetle ESP32 is equipped with the functions and range of applications similar to the FireBeetle-ESP32, which is suitable for one-off DIY projects and wearable devices. This 35mm × 34mm microcontroller has four analog ports, four digital ports, UART, and I2C interfaces.