Here is a sample tutorial video illustrating the use of a light dependent resistor as input to an analog to digital converter pin on an ESP32 to sense changes in light levels.
https://www.youtube.com/watch?v=xFGAKVXmhRM
[Video] ESP32 - Light Dependent Resistor
[Video] ESP32 - Light Dependent Resistor
Free book on ESP32 available here: https://leanpub.com/kolban-ESP32
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