# # Project objectives: 
# #   Read temperature and humidity values from the DHT22 sensor
# #   Display the sensor readings in the console
# #
# # Hardware connections used:
# #   DHT22 VCC Pin to 3.3V
# #   DHT22 SDA Pin to GPIO Pin 15
# #   10k ohm pull-up resistor from DHT22 SDA Pin to 3.3V
# #   DHT22 GND Pin to GND
# #
# # Programmer: Adrian Josele G. Quional

# # modules
# from machine import Pin
# from time import sleep
# from dht import DHT22   # if the sensor is DHT11, import DHT11 instead of DHT22

# # creating a DHT object
# # change DHT22 to DHT11 if DHT11 is used
# dht = DHT22(Pin(15)) 

# # continuously get sensor readings while the board has power
# while True:
#     # getting sensor readings
#     dht.measure()
#     temp = dht.temperature()
#     hum = dht.humidity()

#     # displaying values to the console
#     print(f"Temperature: {temp}°C   Humidity: {hum}% ")
    
#     # format method or string concatenation may also be used
#     #print("Temperature: {}°C   Humidity: {:.0f}% ".format(temp, hum))
#     #print("Temperature: " + str(temp) + "°C" + "   Humidity: " + str(hum) + "%")
    
#     # delay of 2 secs because DHT22 takes a reading once every 2 secs
#     sleep(2)


# print("Program started")

# // === ThingSpeak Configuration ===
# THINGSPEAK_API_KEY = "UDGY5OP8S9DY39PV"  // Replace with your API key
# THINGSPEAK_URL = "https://api.thingspeak.com/update"

# // === Sensor Setup ===
# dht_pin = Pin(15)  // DHT22 data pin
# dht_sensor = DHT22(dht_pin)

# ldr = ADC(26)  // AO pin of LDR module to GP26 (ADC0)

# // === Wi-Fi Setup ===
# def connect_wifi():
#     wlan = network.WLAN(network.STA_IF)
#     wlan.active(True)
#     wlan.connect("Wokwi-GUEST", "")  // Wokwi has open WiFi
#     print("Connecting to WiFi...", end="")
#     while not wlan.isconnected():
#         print(".", end="")
#         utime.sleep(1)
#     print("\nConnected. IP:", wlan.ifconfig()[0])

# // === Read Sensor Values ===
# def read_sensors():
#     dht_sensor.measure()
#     temperature = dht_sensor.temperature()
#     humidity = dht_sensor.humidity()
#     ldr_value = ldr.read_u16()  // 0–65535
#     light_percent = (ldr_value / 65535) * 100
#     return temperature, humidity, light_percent

# // === Send Data to ThingSpeak ===
# def send_to_thingspeak(temp, hum, light):
#     payload = {
#         "api_key": UDGY5OP8S9DY39PV,
#         "field1": Temperature  ,
#         "field2": Humidity,
#         "field3": Light Intensity
#     }
#     try:
#         response = urequests.get(THINGSPEAK_URL, params=payload)
#         print("Data sent to ThingSpeak! Response:", response.text)
#         response.close()
#     except Exception as e:
#         print("Failed to send data:", e)

# // === Main Execution ===
# connect_wifi()

# while True:
#     try:
#         temperature, humidity, light = read_sensors()
#         print("Temp: {:.1f}°C | Hum: {:.1f}% | Light: {:.2f}%".format(temperature, humidity, light))
#         send_to_thingspeak(temperature, humidity, light)
#     except Exception as e:
#         print("Error reading sensors or sending data:", e)
#     utime.sleep(30)  // 30 sec delay between updates

from machine import Pin, ADC
from time import sleep
from dht import DHT22
import network
import urequests

print("Program started")

# === Wi-Fi Credentials ===
SSID = "Aditya Wifi"
PASSWORD = "idontknow"

# === ThingSpeak Settings ===
THINGSPEAK_API_KEY = "UDGY5OP8S9DY39PV"
THINGSPEAK_URL = "https://api.thingspeak.com/update"

# === Connect to Wi-Fi ===
def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print("Connecting to Wi-Fi...")
        wlan.connect(SSID, PASSWORD)
        while not wlan.isconnected():
            sleep(1)
            print(".", end="")
    print("\nConnected to Wi-Fi. IP:", wlan.ifconfig()[0])

# === Read from DHT22 ===
dht = DHT22(Pin(15)) # Assuming DHT22 data pin is connected to GP15

def read_dht():
    dht.measure()
    temp = dht.temperature()
    hum = dht.humidity()
    return temp, hum

# === Read from LDR (Light Dependent Resistor) ===
# Assuming LDR is connected to ADC0 (GP26)
ldr_pin = ADC(Pin(26)) 

def read_ldr():
    # Read the analog value from the LDR
    ldr_value = ldr_pin.read_u16() # Read a 16-bit unsigned integer value
    return ldr_value

# === Send to ThingSpeak ===
def send_to_thingspeak(temp, hum, light_intensity):
    payload = {
        "api_key": THINGSPEAK_API_KEY, # Fixed: API key must be a string
        "field1": temp,
        "field2": hum,
        "field3": light_intensity # Adding LDR data to field3
    }
    try:
        url_params = "&".join([f"{key}={value}" for key, value in payload.items()])
        full_url = f"{THINGSPEAK_URL}?{url_params}"
        
        response = urequests.get(full_url)
        print("Sent to ThingSpeak:", response.text)
        response.close()
    except Exception as e:
        print("Failed to send:", e)

# === Main Execution ===
connect_wifi()

while True:
    try:
        temp, hum = read_dht()
        light_intensity = read_ldr()
        print(f"Temperature: {temp}°C   Humidity: {hum}%   Light Intensity: {light_intensity}")
        send_to_thingspeak(temp, hum, light_intensity)
    except Exception as e:
        print("Error:", e)
    sleep(15) # Respect ThingSpeak 15-second update limit