from machine import Pin, SoftI2C
from i2c_lcd import I2cLcd
import dht, time

i2c = SoftI2C(scl=Pin(22), sda=Pin(21), freq=400000)
lcd = I2cLcd(i2c, 0x27, 2, 16)

lcd.clear()
lcd.backlight_on()

d = dht.DHT22(Pin(4))

while 1:
    try:
        d.measure()
        temp = d.temperature()
        humi = d.humidity()
        lcd.clear()

        lcd.move_to(0, 0)
        line1 = "Temp: {:.1f}C".format(temp)
        lcd.putstr(line1)
        
        lcd.move_to(0, 1)
        line2 = "Humi: {:.1f}%".format(humi)
        lcd.putstr(line2)
        
        time.sleep_ms(100)
    
    except OSError as e: #if sensor is disconnected
        lcd.clear()
        lcd.move_to(0, 0)
        lcd.putstr("Failed to read  sensor!")
        time.sleep_ms(200)