import machine
import time
import urequests
import network
import ujson

# ThingSpeak settings
THINGSPEAK_API_KEY = "JBSGA2DZAT7M9524"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

# Wi-Fi settings
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

# PIR sensor on GPIO 4
pir_sensor = machine.Pin(4, machine.Pin.IN)

# Function to read the PIR state
def read_pir_state():
    return pir_sensor.value()

# Function to send data to ThingSpeak
def send_data_to_thingspeak(motion_detected):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field1": motion_detected,
    }
    response = urequests.post(THINGSPEAK_URL, data=ujson.dumps(data), headers={"Content-Type": "application/json"})
    response.close()

# Initialize the Wi-Fi connection
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASSWORD)

# Wait for the Wi-Fi connection to establish
while not wifi.isconnected():
    time.sleep(1)

print("Connected to Wi-Fi")

if __name__ == "__main__":
    try:
        print("Monitoring motion...")
        while True:
            motion_detected = read_pir_state()
            if motion_detected:
                print("Motion detected!")
                send_data_to_thingspeak(1)
            else:
                print("No motion.")
                send_data_to_thingspeak(0)
            time.sleep(3)  # Check for motion every 3 seconds
    except KeyboardInterrupt:
        print("Program stopped by user")