Sep 21, 2017 · The ESP32 Devkit board is powered from a micro-USB connector. Plug a USB cable with micro-B plug into the micro-USB socket on the board and the other end into a PC USB port to power up the board. A regulator on the board supplies the ESP-WROOM-32 module with 3.3V derived from the USB 5V. ESP32 Board Micro-USB Connector. ESP32 Devkit Main Components The biggest difference between the WROOM and the WROVER chips is that the WROVER integrates an 8 MB "SPI PSRAM" chip on the module along with the ESP32-D0WDQ6.The specs and features of the various ESP32 modules are described in a table at the top of the ESP32 Modules and Boards section of the ESP32 Hardware Reference.