from machine import Pin, time_pulse_us

import time

# Define LEDs

led_red = Pin(19, Pin.OUT)

led_yellow = Pin(18, Pin.OUT)

led_green = Pin(17, Pin.OUT)

led_blue = Pin(16, Pin.OUT)

# IR sensor pin

ir_pin = Pin(20, Pin.IN)

# Function to read code from remote (NEC protocol)

def read_ir():

   # Wait for the start signal (long LOW)

   if time_pulse_us(ir_pin, 0, 1000000) < 8000:

       return None

   # Wait for HIGH (~4.5 ms)

   if time_pulse_us(ir_pin, 1, 1000000) < 4000:

       return None

   data = 0

   for i in range(32):  # NEC protocol = 32 bits

       # LOW (~560 µs)

       time_pulse_us(ir_pin, 0, 1000000)

       # HIGH (560 µs for 0, 1690 µs for 1)

       t = time_pulse_us(ir_pin, 1, 1000000)

       if t > 1000:

           data |= 1 << i

   return data

# Remote control codes (change them according to your remote after printing)

CODE_RED    = 0xba45ff00

CODE_YELLOW = 0xb946ff00

CODE_GREEN  = 0xb847ff00

CODE_BLUE   = 0xbb44ff00

print("Ready... Press remote buttons")

while True:

   code = read_ir()

   if code:

       print("Received code:", hex(code))

       if code == CODE_RED:

           led_red.value(not led_red.value())   # Toggle Red LED

       elif code == CODE_BLUE:

           led_blue.value(not led_blue.value()) # Toggle Blue LED

       elif code == CODE_GREEN:

           led_green.value(not led_green.value()) # Toggle Green LED

       elif code == CODE_YELLOW:

           led_yellow.value(not led_yellow.value()) # Toggle Yellow LED

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