from machine import Pin
import time

PIR_PIN = 16
LED_PIN = 15

pir_sensor = Pin(PIR_PIN, Pin.IN)
light = Pin(LED_PIN, Pin.OUT)

state = False
motion_count = 0

print("Raspberry Pi Pico PIR Motion Detection")

try:
    while True:
        start_time = time.ticks_us()
        
        motion_detected = pir_sensor.value()
        
        if motion_detected == 1:
            light.on()
            response_time = time.ticks_diff(time.ticks_us(), start_time)
            
            if not state:
                motion_count += 1
                print("Motion #" + str(motion_count) + " - Response Time: " + str(response_time) + " μs")
                state = True
                
        else:
            light.off()
            if state:
                print("Motion stopped")
                state = False
        
        time.sleep(0.5)

except KeyboardInterrupt:
    light.off()