?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. The core of the ESP32-WROOM-32D and ESP32-WROOM-32U modules is the ESP32-D0WD chip, which belongs to the ESP32 series and is scalable and adaptive. Both CPU cores can be controlled independently. The clock frequency can be adjusted from 80 MHz to 240 MHz. Users can cut power to the CPU and use a low-power co-processor to constantly monitor peripheral state changes or whether certain analog quantities exceed thresholds. 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. The ESP32-WROOM-32D module integrates traditional Bluetooth, Bluetooth low energy, and Wi-Fi, and has a wide range of uses: Wi-Fi supports a wide range of communication connections and also supports direct connection to the Internet through a router; while Bluetooth allows users to Connect a mobile phone or broadcast a BLE Beacon for signal detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery-powered wearable electronics. The module supports data transfer rates up to 150 Mbps and antenna output power up to 20 dBm for maximum range wireless communication. Therefore, this module has industry-leading technical specifications and excellent performance in terms of high integration, wireless transmission distance, power consumption, and network connectivity. The operating system of the ESP32 is freeRTOS with LwIP and also has built-in TLS 1.2 with hardware acceleration. The chip also supports OTA encryption upgrade, which is convenient for users to continue to upgrade after the product is released.

?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.