'''

Voltaat Learn (http://learn.voltaat.com)

Link to the full tutorial:

Tutorial: How to use the microphone sensor with the Raspberry Pi Pico board.

This sketch lights up a white led when you clap twice in a row..

Note: You can use this sketch with any Raspberry Pi Pico.

'''

from machine import Pin, ADC

import time

# Define pins

mic = ADC(26)          # Analog output from microphone (A0)

led = Pin(16, Pin.OUT)

# Variables

clap = 0

detection_range_start = 0

detection_range = 0

status_lights = False

# Threshold for clap detection (adjust experimentally)

THRESHOLD = 58500  # range: 0 → 65535

while True:

   raw_value = mic.read_u16()

   if raw_value > THRESHOLD:  # Clap detected

       if clap == 0:

           detection_range_start = detection_range = time.ticks_ms()

           clap += 1

       elif clap > 0 and time.ticks_diff(time.ticks_ms(), detection_range) >= 50:

           detection_range = time.ticks_ms()

           clap += 1

       # Small delay to avoid multiple triggers for one clap

       time.sleep(0.001)

   # If more than 400 ms passed since first clap

   if time.ticks_diff(time.ticks_ms(), detection_range_start) >= 400:

       if clap == 2:

           if not status_lights:

               status_lights = True

               led.value(1)   # Turn ON LED

               print("LED ON")

           else:

               status_lights = False

               led.value(0)   # Turn OFF LED

               print("LED OFF")

       clap = 0

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