For more information about ESP-WROOM-02D, please view at: https://www.espressif.com/sites/default/files/documentation/esp-wroom-02d_esp-wroom-02u_datasheet_en.pdf
For more information about ESP-WROOM-02D, please view at: https://www.espressif.com/sites/default/files/documentation/esp-wroom-02d_esp-wroom-02u_datasheet_en.pdf