import machine
import network
import time
import urequests
import ujson
import dht

# WiFi credentials
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

#ThingSpeak APT settings
THINGSPEAK_API_KEY = "DJQQMMIDJ3OBMFU6"
THINGSPEAK_URL = "https://api.thingspeak.com/update"

# DHT22 (AM2302) sensor on GRIO 22
dht_sensor = dht.DHT22(machine.Pin(22))

# PIR sensor in Place A on GPIO 21
pir_sensor_pinA = machine.Pin(21, machine.Pin.IN)

# PIR sensor in Place B on GPIO 20
pir_sensor_pinB = machine.Pin(20, machine.Pin.IN)

# PIR sensor in Place C on GPIO 19
pir_sensor_pinC = machine.Pin(19, machine.Pin.IN)

# Connect potentiometer to ADC pin (Microphone) 
sound_pin = machine.ADC(0) 

# Connect potentiometer to ADC pin (Camera) 
camera_pin = machine.ADC(1) 

# Function to read room temperature and humidity
def read_room_temperature_humidity():
    dht_sensor.measure()
    temperature = dht_sensor.temperature()
    humidity = dht_sensor.humidity()
    return temperature, humidity

# Function to read PIR sensor state
def read_pir():
    pir_state_A = pir_sensor_pinA.value()
    pir_state_B = pir_sensor_pinB.value()
    pir_state_C = pir_sensor_pinC.value()
    return pir_state_A, pir_state_B, pir_state_C

# Function to send data to ThingSpeak
def send_data_to_thingspeak(temperature,pir_state_A, pir_state_B, pir_state_C,sound_value,camera_value):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field1": temperature,
        "field2": pir_state_A,
        "field3": pir_state_B,
        "field4": pir_state_C,
        "field5": sound_value,
        "field6": camera_value,
    }
    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:
        while True:

            temperature, humidity = read_room_temperature_humidity()
            print(f"Temp:{temperature}")
            time.sleep(1)
            pir_state_A, pir_state_B, pir_state_C = read_pir()
            print(f"Motion Status - Place A: {pir_state_A}, Place B: {pir_state_B}, Place C: {pir_state_C}")
            sound_value = sound_pin.read_u16()/ 65535 * 120
            print(f"Sound Volume:{sound_value}dB")
            camera_value = round(camera_pin.read_u16()/ 65535 * 1000)
            print(f"Total Attendees:{camera_value}")
            send_data_to_thingspeak(temperature,pir_state_A, pir_state_B, pir_state_C,sound_value,camera_value)
            print("Data sent to ThingSpeak")
            time.sleep(15)

    except KeyboardInterrupt:
        pass