from machine import I2C, Pin
from pico_i2c_lcd import I2cLcd
import dht
import utime

# Initialize I2C communication
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)

# Scan for the LCD address
I2C_ADDR = i2c.scan()[0]

# Initialize LCD object
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)

# Define pin for DHT22 sensor
DHT_PIN = 10

# Create DHT22 sensor object
dht_sensor = dht.DHT22(machine.Pin(DHT_PIN))

# Function to read sensor data
def read_sensor_data():
    try:
        # Measure temperature and humidity
        dht_sensor.measure()
        temperature = dht_sensor.temperature()
        humidity = dht_sensor.humidity()
        return temperature, humidity
    except Exception as e:
        # Print error if reading fails
        print("Error reading sensor:", e)
        return None, None

# Main loop
while True:
    # Read sensor data
    temp, hum = read_sensor_data()
    
    # Display data on LCD if available
    if temp is not None and hum is not None:
        lcd.putstr("Temperature: {},Humidity: {}".format(temp, hum))
    else:
        # Print error if data is not available
        print("Failed to read sensor.")
    
    # Delay for 1 second
    utime.sleep(1)