from machine import I2C, Pin, Timer
from esp8266_i2c_lcd import I2cLcd
import utime, gc, dht

def lcd_show(text, clear=True):
    if clear:
        lcd.clear()
    lcd.move_to(0, 0)
    lcd.putstr(text)


gc.enable()
DEFAULT_I2C_ADDR = 0x27
hw_i2c0 = I2C(1, freq=200000)
lcd = I2cLcd(hw_i2c0, DEFAULT_I2C_ADDR, 2, 16)
sensor = dht.DHT22(Pin(17))
t=h=0
while 1:
    sensor.measure() # read the parameters from the sensor
    if t !=sensor.temperature() or h!=sensor.humidity():
        t = sensor.temperature()
        h = sensor.humidity()
        lcd_show('Temp:'+str(t)+'c      Humidity:'+str(h)+'%')
    utime.sleep(5)