import network
import time
from machine import Pin, PWM
import dht
import ujson
from umqtt.simple import MQTTClient

# MQTT Server Parameters
MQTT_CLIENT_ID = "micropython-weather-demo"
MQTT_BROKER    = "broker.mqttdashboard.com"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "Weather"

sensor = dht.DHT22(Pin(15))
led = Pin(12,Pin.OUT)
buzzer = PWM(Pin(13),250)
buzzer.duty(0)

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(0.3)
print("\n Connected to Network")

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

print("\n Connected to MQTT Server")
print("Design and Coded by YoN")

prev_weather = ""
while True:
  print("Measuring weather conditions... ", end="")
  sensor.measure() 
  message = ujson.dumps({
    "temp": sensor.temperature(),
    "humidity": sensor.humidity(),
  })
  if (message != prev_weather):
    print("\n Updated!")
    print("Reporting to MQTT topic {}:\n{}".format(MQTT_TOPIC, message))
    client.publish(MQTT_TOPIC, message)
    prev_weather = message

    temperature = sensor.temperature()
    humidity = sensor.humidity()

    if (temperature >= 30 or humidity >= 30):
      if(temperature>=30):
        print("Temperature has raised to",temperature,"°C")
      if (humidity>=30):
        print("Humidity has raised to ",humidity,"%")
      led.on()
      buzzer.duty(10)
      time.sleep(1)
      led.off()
      buzzer.duty(0)
      time.sleep(0.5)
      led.on()
      buzzer.duty(10)
      time.sleep(1)
      led.off()
      buzzer.duty(0)
      time.sleep(0.5)
      led.on()
      buzzer.duty(10)
      time.sleep(1)
      led.off()
      buzzer.duty(0)
      time.sleep(0.5)
      led.on()
      buzzer.duty(10)
      time.sleep(1)
      led.off()
      buzzer.duty(0)
      time.sleep(0.5)
  else:
    print("\n No change")
  time.sleep(1)