"""
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
import dht
import ujson
from umqtt.simple import MQTTClient
BUTTON_PIN = 4
push_button = Pin(23, Pin.IN)  # 23 number pin is input
# MQTT Server Parameters
MQTT_CLIENT_ID = "micropython-weather-demo-aula3"
MQTT_BROKER    = "broker.mqttdashboard.com"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC_TEMP       = "wokwi-weather-aula3-temp"
MQTT_TOPIC_BUTTON     = "wokwi-weather-aula3-button"

sensor = dht.DHT22(Pin(15))
logic_state = False;

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 = ""
while True:
  #logic_state = push_button.value()
  if logic_state == True:     # if pressed the push_button
      print("Pushbutton pressed ")
  else:                       # if push_button not pressed
      print("Pushbutton not pressed ")
  print("Measuring weather conditions... ", end="")
  sensor.measure() 
  message_temp = ujson.dumps({
    "temp": sensor.temperature(),
    "humidity": sensor.humidity(),
  })
  if logic_state != push_button.value():
    logic_state = push_button.value()
    message_button = ujson.dumps({
      "button": logic_state
    })
    print("Updated button value!")
    print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC_BUTTON, message_button))
    client.publish(MQTT_TOPIC_BUTTON, message_button)
    #prev_weather = message
  else:
    print("No change")
 
  print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC_TEMP, message_temp))
  client.publish(MQTT_TOPIC_TEMP, message_temp)
  prev_weather = message_temp
  
  time.sleep(3)