?Power Options: The development board can choose one of the following three power supply methods: Micro USB powered (default) 5V / GND pin power supply 3V3 / GND pin power supply Note: The above power modes cannot be connected at the same time, otherwise the development board and/or power supply may be damaged. ?Module Overview: ESP32-WROOM-32U and ESP32-WROOM-32D are general-purpose Wi-Fi+BT+BLE MCU modules, which are powerful and versatile. Can be used for low-power sensor networks and demanding tasks such as speech encoding, audio streaming, and MP3 decoding. Unlike ESP32-WROOM-32D, ESP32-WROOM-32U integrates a U.FL socket. ESP32 also integrates rich peripherals, including a capacitive touch sensor, Hall sensor, SD card interface, Ethernet interface, high-speed SDIO/SPI, UART, I2S, and I2C, etc. ?Hardware: ?Module interface: SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC. ?On-chip sensor: Hall sensor ?Integrated crystal oscillator: 40 MHz crystal oscillator ?Integrated SPI flash: 4 MB ?Working voltage/supply voltage: 3.0V ~ 3.6 V ?Working current: Average: 80 mA ?Minimum supply current: 500 mA ?Recommended operating temperature range: -40 °C ~ +85 °C. ?Wi-Fi: ?Protocol: Support 802.11 b/g/n (802.11n, speed up to 150 Mbps), A-MPDU and A-MSDU aggregation, support 0.4 µs guard interval ?Frequency range: 2.4 GHz ~ 2.5 GHz ?Bluetooth: ?Protocol: Compliant with Bluetooth v4.2 BR/EDR and BLE standards ?RF: NZIF receiver with -97 dBm sensitivity, Class-1, Class-2, and Class-3 transmitter, AFH. ?Audio: CVSD and SBC audio. Overview ESP32-DevKitC V4 is a small development board based on ESP32. Most of the pins of the modules on the board have been drawn out. Developers can easily connect various peripheral devices through jumpers according to actual needs, or plug the development board into the ESP32-DevKitC V4. Use on a breadboard. To better meet the needs of different users, ESP32-DevKitC V4 also supports the following different configurations: Optional multiple ESP32 modules Optional pin header or female header.