"""
MicroPython IoT Weather Station Example for Wokwi.com

To view the data:

1. Go to http://www.hivemq.com/demos/websocket-client/
2. Click "Connect"
3. Under Subscriptions, click "Add New Topic Subscription"
4. In the Topic field, type "wokwi-weather" then click "Subscribe"

Now click on the DHT22 sensor in the simulation,
change the temperature/humidity, and you should see
the message appear on the MQTT Broker, in the "Messages" pane.

Copyright (C) 2022, Uri Shaked

https://wokwi.com/arduino/projects/322577683855704658
"""

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

from machine import PWM

class Servo:
    def __init__(self, pin_id):
        self.pwm = PWM(Pin(pin_id), freq=50)
        self.min_duty = 40
        self.max_duty = 115

    def write(self, angle):
        duty = int(self.min_duty + (angle / 180) * (self.max_duty - self.min_duty))
        self.pwm.duty(duty)


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

sensor = dht.DHT22(Pin(15))
servo_pin = 18
servo = PWM(Pin(servo_pin), freq=50)
Servo1 = Servo(pin_id=servo_pin)


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 = ""
servo_active = False
Umbral_temperatura = 25
"""
while True:
  print("Measuring weather conditions... ", end="")
  sensor.measure() 
  message = ujson.dumps({
    "temp": sensor.temperature(),
    "humidity": sensor.humidity(),
  })
  if message != prev_weather:
    print("Updated!")
    print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
    client.publish(MQTT_TOPIC, message)
    prev_weather = message
  else:
    print("No change")
  time.sleep(1)

  """
  while True:
      sensor.measure()
      temperature = sensor.temperature()
      print("Temperatura actual:", temperature)

      if temperature > Umbral_temperatura and not servo_active:
          print("Umbral de temparatura exedido. Activado servo.")
          servo_active = True
          message = ujson.drumps({  #Se transforma en Json el valor de temperatura
              "temp": temperature,
          })
          print("Reporting to MQTT topic {}: {}" .format(MQTT_TOPIC, message))
          client.publish(MQTT_TOPIC, message)
          while temperature > Umbral_temperatura: 
              Servo.write(0)
              time.sleep(1)
              Servo1.white(180)
              time.sleep(1)
              sensor.measure()
              temperature = sensor.temperature()

          Servo1.write(90)
          servo_active = False

        time.sleep(1)