#script to control the LED brightness w.r.to intensity of light falling on LDR
from machine import Pin, ADC, PWM 
from time import sleep
 
#Configure ADC for ESP32 
ldr = ADC(Pin(34)) 
ldr.width(ADC.WIDTH_10BIT) 	# 10 bit resolution => 0 to 1023
ldr.atten(ADC.ATTN_11DB) 	# 11 DB => full range voltage: 3.3V

frequency = 5000 
Led_pwm = PWM(Pin(4), frequency) 

while True: 
	ldr_value = ldr.read()
	print("ldr_value=", ldr_value)

	voltage = ldr_value*(3.3/1023)
	print("ldr_voltage=", voltage)

	Led_pwm.duty(ldr_value) 
	sleep(0.1)