import machine
import utime
import network
import urequests

# Configure pins
trig_pin = machine.Pin(4, machine.Pin.OUT)
echo_pin = machine.Pin(5, machine.Pin.IN)
buzzer_pin = machine.Pin(2, machine.Pin.OUT)
pir_sensor_pin = machine.Pin(27, machine.Pin.IN)

potentiometer_pin = machine.ADC(26)  # ADC pin on GP26
red_led_pin = machine.Pin(18, machine.Pin.OUT)
yellow_led_pin = machine.Pin(19, machine.Pin.OUT)
green_led_pin = machine.Pin(20, machine.Pin.OUT)

# Thingspeak API key and URL
api_key = "4919MY9UE360KNLQ"
thingspeak_url = "https://api.thingspeak.com/update"

# Connect to Wokwi Guest WiFi
ssid = "Wokwi-Guest"
password = ""

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)

while not wlan.isconnected():
    utime.sleep(1)

print("Connected to Wokwi Guest WiFi")

# Motion counting variables
motion_count = 0
start_time = 0
counting_duration = 10  # in seconds

def measure_distance():
    # Trigger ultrasonic sensor
    trig_pin.on()
    utime.sleep_us(10)
    trig_pin.off()

    # Measure echo pulse duration
    pulse_start = utime.ticks_us()
    while echo_pin.value() == 0:
        pulse_start = utime.ticks_us()
    while echo_pin.value() == 1:
        pulse_end = utime.ticks_us()

    pulse_duration = pulse_end - pulse_start

    # Convert pulse duration to distance (in cm)
    distance = pulse_duration * 0.034 / 2

    return distance

def read_potentiometer():
    # Read potentiometer value
    pot_value = potentiometer_pin.read_u16()

    # Map potentiometer value to LED ranges
    if pot_value < 10000:
        green_led_pin.on()
        yellow_led_pin.off()
        red_led_pin.off()
    elif 10000 <= pot_value < 20000:
        green_led_pin.off()
        yellow_led_pin.on()
        red_led_pin.off()
    else:
        green_led_pin.off()
        yellow_led_pin.off()
        red_led_pin.on()

    return pot_value

def send_to_thingspeak(distance, pot_value, motion_count):
    # Prepare Thingspeak data
    data = {"api_key": api_key, "field1": distance, "field2": pot_value, "field3": motion_count}

    # Send HTTP POST request to Thingspeak
    response = urequests.post(thingspeak_url, json=data)

    if response.status_code == 200:
        print("Data sent to Thingspeak successfully")
    else:
        print("Failed to send data to Thingspeak")

    response.close()

try:
    while True:
        distance = measure_distance()
        print("Distance: {} cm".format(distance))

        pot_value = read_potentiometer()
        print("Potentiometer Value: {}".format(pot_value))

        if distance < 50:
            buzzer_pin.on()  # Activate buzzer if distance is less than 50
        else:
            buzzer_pin.off()
    

        if pir_sensor_pin.value():  # Motion detected
            if start_time == 0:
                start_time = utime.time()

            motion_count += 1

        elif start_time != 0 and utime.time() - start_time >= counting_duration:
            # Send data to Thingspeak and reset variables
            send_to_thingspeak(distance, pot_value, motion_count)
            print("Motion Count: {}".format(motion_count))
            motion_count = 0
            start_time = 0

        utime.sleep(10)  # Delay between measurements

except KeyboardInterrupt:
    print("\nProgram terminated by user")
    wlan.disconnect()
    wlan.active(False)