"""
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
"""


from machine import Pin, I2C
from utime import sleep
import dht

from module_oled import Oled
from module_wifi import Wifi, NotConnectedException

sensor = dht.DHT22(Pin(20, Pin.IN))
heater = Pin(19, Pin.OUT)
wake_up_button = Pin(12, Pin.IN)

# dimensions de l'écran
LARGEUR  = 120 
HAUTEUR = 32

# initialisation i2c et oled
i2c = I2C(0, scl=Pin(17), sda=Pin(16), freq=200000) 
oled = Oled(scl=17, sda=16)

wifi = Wifi("Wokwi-GUEST", "")


class ReadTempException(Exception):
  pass


def get_temperature():
  try:
    
    return sensor.temperature()
  except OSError as e:
    raise ReadTempException('Failed to read sensor.')

prev_temp = prev_hum = None
loop = 0

while True:
  oled.clear()
  loop += 1

  print(f"loop={loop}")

  # réaliser la mesure
  try:
    sensor.measure()
    temp = sensor.temperature()
    oled.push(f"T={temp}C")
    hum = sensor.humidity()
    oled.push(f"H={hum}%")
  except OSError as e:
    oled.push("Erreur mesure")
    sleep(2)
    continue  # on retente une lecture
  
  # on alume ou on éteint la lampe
  do_heat = 1
  if temp >= 40:
    do_heat = 0
  elif temp <= 35:
    do_heat = 1
  heater.value(do_heat)
  
  if prev_temp != temp or prev_hum != hum:
    # les données ont changées
    # on envoie un relevé au serveur
    print(f"Wifi post data: {temp} (prev. {prev_temp}), {hum} (prev. {prev_hum})")
    try:
      data = {
        "board_name": "wokwi",
        "temperature": temp,
        "humidity": hum,
        "heater": do_heat,
      }
      response = wifi.post("https://log-measure.osc-fr1.scalingo.io", data)
      print(response.status_code, response.text)
      oled.push("Mesures envoyees")
      prev_temp = temp
      prev_hum = hum
    except NotConnectedException:
      oled.push("Erreur wifi")
  else:
    oled.push("Mesures constantes")

  sleep(1)