import machine 
from machine import Pin, SoftI2C 
from lcd_api import LcdApi 
from i2c_lcd import I2cLcd 
import network
import ujson
import time
from umqtt.simple import MQTTClient

MQTT_CLIENT_ID = "micropython-temphum"
MQTT_BROKER    = "test.mosquitto.org"
MQTT_PORT = 1883
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "temp13378"
MQTT_TOPIC1     = "hum13378"
 
from machine import Pin 
import dht
d = dht.DHT22(machine.Pin(15))

I2C_ADDR = 0x27
totalRows = 2
totalColumns = 16

led1 = machine.Pin(14, machine.Pin.OUT) 
led2 = machine.Pin(26, machine.Pin.OUT)


i2c = SoftI2C(scl=Pin(13), sda=Pin(12), freq=10000)

lcd = I2cLcd(i2c, I2C_ADDR, totalRows, totalColumns)


sensor = dht.DHT22(Pin(15))

print("Connecting to WiFi", end="")
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")

print("Connecting to MQTT server... ", end="")
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, user=MQTT_USER, password=MQTT_PASSWORD)
client.connect()
print("Connected!")


while True:
  try:
    sensor.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    print(temp)
    print(hum)
    
  except OSError as e:
    print('Failed to read sensor.')

  if 17<temp<25:
    led1.off()
  else:
    led1.on()

  if 20<hum<60:
    led2.off()
  else:
    led2.on()


  


  lcd.clear()
  lcd.putstr(f'Temp: {temp}')
  lcd.putstr(f' \nHumidity: {hum}')

  prev_weathertemp = ""
  prev_weatherhum = ""
  messagetemp = str(d.temperature())
  messagehum = str(d.humidity())



  if (temp != prev_weathertemp) or (hum != prev_weatherhum):
    print("Updated!")
    print("Reporting to MQTT topic")
    prev_weathertemp = temp
    prev_weatherhum = hum
    client.publish(MQTT_TOPIC, str(temp))
    client.publish(MQTT_TOPIC1, str(hum))
  else:
    print("No change")
  time.sleep(1)