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


# MQTT Server Parameters
MQTT_CLIENT_ID = "myWeather234"
MQTT_BROKER    = "test.mosquitto.org"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "unisa_iot/p01/wk-weather"
MQTT_LED =  "unisa_iot/p01/wk-setLed"
MQTT_DHT = "unisa_iot/p01/wk-setdht"

sensor = dht.DHT22(Pin(15))
led = Pin(2, Pin.OUT)
led.off()

def subCallback(topic,msg):
  print(topic,msg)
  if str(topic.decode()) == MQTT_LED:
    if msg == b'1':
      led.on()
    elif msg == b'0':
      led.off()
  if str(topic.decode()) == MQTT_DHT:
    if msg > 60 :


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)
client.set_callback(subCallback)
client.connect()
client.subscribe(MQTT_LED)

print("Connected!")

prev_weather = ""
while True:
  client.check_msg()
  print("Measuring weather conditions... ", end="")
  sensor.measure() 
  message = ujson.dumps({
    "temp": sensor.temperature(),
    "humidity": sensor.humidity(),
  })
  if sensor.temperature > 40:
    print("OOOO")
  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)