from time import sleep_us,sleep
from time import sleep
import dht 
from lcd_api import LcdApi
from i2c_lcd import I2cLcd
import machine
import time
sensor = dht.DHT22(Pin(33))
I2C_ADDR = 0x27
i2c = SoftI2C(scl=Pin(21), sda=Pin(22), freq=10000)    
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)
echo=Pin(25,Pin.IN)
trig=Pin(26,Pin.OUT)  
    
def display_dht(t):
    global hum
    global temp
    lcd.move_to(0,0)
    lcd.putstr("T:{:.0f} C".format(temp)) 
    lcd.move_to(7,0)
    lcd.putstr("H:{:.0f} %".format(hum)) 

tim1 = Timer(1)
tim1.init(period=10000, mode=Timer.PERIODIC, callback=display_dht)
while True:
    try:
      sensor.measure()
      temp = sensor.temperature()
      hum = sensor.humidity()
    except OSError as e:
      print('Failed to read sensor.')

    trig.on()
    time.sleep_us(10)
    trig.off()
    x=machine.time_pulse_us(echo,1, 30000)
    distance= (x / 4) / 29.1 *2 -1.6 #using 0.034 instead of 0.0343 to get right value
    print('Distance:', distance, 'cm')

    lcd.move_to(0,1)
    lcd.putstr('{:.0f}'.format(distance)+' cm')   
    
sleep(0.5)