import machine
import time
import dht
import network
import ujson
from umqtt.simple import MQTTClient
from machine import Pin, SoftI2C
from i2c_lcd import LiquidCrystalI2C

# MQTT Server Parameters
MQTT_CLIENT_ID = "micropython-weather-demo"
MQTT_BROKER    = "test.mosquitto.org"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "oioikioji"

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!")
prev_weather = ""

i2c = SoftI2C(sda=Pin(21), scl=Pin(22))
lcd = LiquidCrystalI2C(i2c, 0x27, 16, 2)
lcd.set_controlled_cursor(False)
lcd.home()
lcd.display()
lcd.backlight()
red = machine.Pin(18, machine.Pin.OUT)
green = machine.Pin(19, machine.Pin.OUT)
d = dht.DHT22(machine.Pin(2))
while True:
  d.measure()
  temperature, humidity = d.temperature(), d.humidity()
  print(f"temperature: {temperature}\nhumidity: {humidity}")
  lcd.clear()
  lcd.print(f"temp: {temperature}")
  lcd.set_cursor(0, 1)
  lcd.print(f"humidity: {humidity}")
  message = ujson.dumps({
    "temperature": temperature,
    "humidity": humidity,
  })
  if message != prev_weather:
    print("Updated!")
    print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
    client.publish(MQTT_TOPIC, message)
    prev_weather = message
  if humidity >= 70:
    red.value(1)
  else:
    red.value(0)
  if temperature >= 70:
    green.value(1)
  else:
    green.value(0)

  time.sleep(2)