The easy circuit shows how to to form one electrical divider using a ESP32 S3 microcontroller plus the 1k kiloohm resistance. Using placing two resistors on series, one can reduce an voltage quantity to the reading http://theengineerstore.in/products/5v-2-1a-3-usb-power-bank-battery-charger-module-circuit-board-step-up-boost-diy