import machine, time
import dht
from umqtt.simple import MQTTClient
import network
from math import log

sensor = dht.DHT22(machine.Pin(4))  # Assuming GPIO 4 for DHT22

def read_sensor():
    sensor.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    print('Temperature: {}°C, Humidity: {}%'.format(temp, hum))
    return temp, hum

# WiFi credentials
ssid = 'Wokwi-GUEST'  # Your WiFi SSID
password = ''  # Your WiFi password

# ThingSpeak MQTT settings
mqtt_server = "mqtt3.thingspeak.com"  # ThingSpeak MQTT server address
channel_id = "2496287"  # Your ThingSpeak Channel ID
write_api_key = "KSJFGA0HWGPVZYOS"  # Your ThingSpeak channel write API key
client_id = "GQs3MyM0EhgyNRwhMCQqEjE"  # Client ID for MQTT connection (can be empty)
mqtt_user = "GQs3MyM0EhgyNRwhMCQqEjE"
mqtt_password = "dMsyE6A/C+PKRo1UtcHyobVZ"

# Connect to WiFi
station = network.WLAN(network.STA_IF)  # Create a station interface for WiFi connection
station.active(True)  # Activate the station interface
station.connect(ssid, password)  # Connect to the WiFi network
while station.isconnected() == False:  # Wait until the connection is successful
    pass
print("Connection successful")

def send_to_thingspeak(temp, hum):
    client = MQTTClient(client_id, mqtt_server, user=mqtt_user, password=mqtt_password)
    client.connect()  # Connect to the MQTT server
    client.publish("channels/2496287/publish/fields/field1", str(temp))  # Publish temp to the specified channel
    client.publish("channels/2496287/publish/fields/field2", str(hum))  # Publish hum to the specified channel
    client.disconnect() 

led = machine.Pin(2, machine.Pin.OUT) 

from machine import ADC, Pin
import math

# Initialize ADC
adc = ADC(Pin(34))  # Use the correct pin number here
adc.atten(ADC.ATTN_11DB)  # For full range measurement

def read_ntc_temperature():
    analog_value = adc.read()
    # Ensure analog_value does not lead to a domain error in the logarithm
    if analog_value <= 0 or analog_value >= 1023:
        return None  # Prevent math domain error
    
    beta = 3950
    try:
        celsius_value = 1 / (math.log(1 / (1023. / analog_value - 1)) / beta + 1.0 / 298.15) - 273.15
    except ValueError:
        # Catch any other math domain errors and return None
        return None
    return celsius_value

temperature = read_ntc_temperature()
if temperature is not None:
    print('Temperature: {:.2f}°C'.format(temperature))
else:
    print('Error reading temperature or invalid value')
if celsius_value > 20:
    led.on()
else:
    led.off()



while True:
    temp, hum = read_sensor()  # Measure distance using the ultrasonic sensor
    send_to_thingspeak(temp, hum)  # Send the measured distance to ThingSpeak
    print("Sent temperature:", temp, "to ThingSpeak")  # Print confirmation message
    print("Sent humidity:", hum, "to ThingSpeak")  # Print confirmation message
    time.sleep(5)