The keyestudio ESP32-IO shield is designed to be compatible with the keyestudio ESP32 Core board. The ESP32-IO shield has brought out all the pins of keyestudio ESP32 Core board in the form of 2.54mm pin header.
In order to connect other sensors easily, the ESP32-IO shield also has 2 rows of 2.54mm pin headers, powering external sensors/modules with DC 3.3V voltage.
At the same time, in order to supply the power to keyestudio ESP32 Core board, the ESP32-IO shield has also designed with the power supply circuit. When using, you only need to input DC 7-12V voltage on the black DC jack to power the keyestudio ESP32 Core board.
And the ESP32-IO shield also comes with a DIP switch, for controlling the power.