ESP32-DevKitC Development Board WIFI+Bluetooth IoT NodeMCU - ESP32-WROOM-32U
OVERVIEW : ESP32-DevKitC V4 is a small development board based on ESP32 by Espressif. Most of the pins of the modules on the board have been led out. Developers can easily connect multiple peripheral devices through jumpers according to actual needs, or develop The board is used on the breadboard.
Annotation :
Pins D0, D1, D2, D3, CMD and CLK are used for internal communication between the ESP32 chip and the SPI flash, and are concentrated on the two sides of the development board near the USB port. Generally speaking, these pins should not be connected, otherwise it may affect the operation of SPI flash / SPI RAM.
Pins GPIO16 and GPIO17 are only applicable to the onboard ESP32-WROOM series and ESP32-SOLO-1 development boards, reserved for internal use.
Power options The development board can choose one of the following three power supply modes: Micro USB power supply (default) 5V / GND pin power supply 3V3 / GND pin power supply