Connecting a 4.5V sensor to ESP32

[daveblynk]

You may want to use a different ADC for the following reason. If you read to the end of the post there is a conflict with ADC1 and WIFI.

ESP32 Capacitive Soil Sensor Read Problem

There are other more advanced functions to use with the ADC pins that can be useful in other projects. analogReadResolution(resolution): set the sample bits and resolution. It can be a value between 9 (0 – 511) and 12 bits (0 – 4095). Default is 12-bit resolution. analogSetWidth(width): set the sample bits and resolution. It can be a value between 9 (0 – 511) and 12 bits (0 – 4095). Default is 12-bit resolution. analogSetCycles(cycles): set the number of cycles per sample. Default is 8. Range…