@Mathijs I just connected the LDR, but i don’t get a usable signal from it. It just displays me 4095 as the input signal, so the highest value i suppose. Covering the LDR doesn’t change anything. I attached a photo of my setup and my code. I changed the cables, the resistor, the ground connection and even the LDR.
If i deattach the 3.3V the Value drops to 0 as it should. Do you have any idea where the problem might be?
Edit: if i rebuild the Setup with my Arduino Mega, then it works, guess there is something wrong with my ESP32 right?