Day 10: Interactive Lighting – Combining Photoresistor, Buttons, and LEDs

from machine import Pin, PWM, ADC
import time

# Initialize the LED pins for PWM and digital output
led_main = PWM(Pin(15))
led_main.freq(1000)
led1 = Pin(16, Pin.OUT)
led2 = Pin(17, Pin.OUT)

# Initialize the photoresistor pin for ADC and button pins for input
photoresistor = ADC(Pin(26))
button1 = Pin(14, Pin.IN, Pin.PULL_DOWN)
button2 = Pin(13, Pin.IN, Pin.PULL_DOWN)

# Variables to keep track of button states and modes
mode = 0
last_button1_state = 0
last_button2_state = 0

while True:
    # Read the value from the photoresistor
    light_level = photoresistor.read_u16()

    # Map the light level to the PWM duty cycle (inverse relationship)
    duty_cycle = 65535 - light_level

    # Set the main LED brightness
    led_main.duty_u16(duty_cycle)

    # Read the button states
    button1_state = button1.value()
    button2_state = button2.value()

    # Toggle mode with button 1
    if button1_state == 1 and last_button1_state == 0:
        mode = (mode + 1) % 2

    # Control additional LEDs with button 2
    if button2_state == 1 and last_button2_state == 0:
        if led1.value() == 0:
            led1.on()
            led2.off()
        else:
            led1.off()
            led2.on()

    # Update last button states
    last_button1_state = button1_state
    last_button2_state = button2_state

    # Mode-specific behaviors
    if mode == 0:
        # Mode 0: Main LED controlled by photoresistor, additional LEDs toggle with button 2
        pass
    elif mode == 1:
        # Mode 1: Main LED blinks, additional LEDs toggle with button 2
        led_main.duty_u16(32767)  # Set main LED to half brightness
        time.sleep(0.5)
        led_main.duty_u16(0)      # Turn off main LED
        time.sleep(0.5)

    # Delay for a short period
    time.sleep(0.1)