#import network
#import ntptime
import time
time.sleep(0.1) # Wait for USB to become ready
from machine import I2C, Pin
from machine_i2c_lcd import I2cLcd
from dht import DHT22

i2c = I2C(0, sda=Pin(20), scl=Pin(21), freq=100000)
lcd = I2cLcd(i2c, 0x27, 2, 16)
dht22_sensor = DHT22(Pin(16, Pin.IN, Pin.PULL_UP))
#ntptime.settime()
time.localtime()

UTC_OFFSET=2
dateT = ""
timeT = ""
tempT = ""
humiT = ""
counter = 1

def readSensor():
    print("readSensor")
    global tempT, humiT
    # Messung durchführen
    dht22_sensor.measure()
    # Werte lesen
    temp = dht22_sensor.temperature()
    humi = dht22_sensor.humidity()
    # Werte ausgeben
    if temp != tempT:
        lcd.move_to(0, 0)
        lcd.putstr(str(temp)+ "\337C")
        print('Temperatur:', temp, '°C')
    if humi != humiT:
        lcd.move_to(11, 0)
        lcd.putstr(str(humi) + "%\n")
        print('Luftfeuchtigkeit:', humi, '%')
    tempT = temp
    humiT = humi

def getNow(UTC_OFFSET=2):
    return time.gmtime(time.time() + UTC_OFFSET * 3600)

def clock():
    global dateT, timeT
    dt = getNow()
    date = str(dt[2]) + '.' + str(dt[1]) + '.'+ str(dt[0])
    timex = str("%02d" % (dt[3])) + ':' + str("%02d" % dt[4])
    if date != dateT:
        lcd.move_to(0, 1)
        lcd.putstr(date)
    if time != timeT:
        lcd.move_to(11, 1)
        lcd.putstr(timex)
    dateT = date
    timeT = timex


readSensor()
clock()

while True:
    try:
        if counter == 59:
            readSensor()
            counter = 1
        clock()  
    except OSError:
        print('Fehler / Verkabelung prüfen')
        print()
    counter+=1
    time.sleep(1)