import network
import time
import machine
from machine import Pin, ADC, UART, SPI, SDCard
import dht
import ujson
import os


sensor = dht.DHT22(Pin(15))

sd = SDCard(slot=3, mosi=Pin(13), mosi=Pin(12), sck=Pin(14, cs=Pin(5)))

os.mount(sd, "/sd mounted")
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("Updated!")
    print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
    client.publish(MQTT_TOPIC, message)
    with open("temp.txt", "w") as f:
      f.write("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
    prev_weather = message

  else:
    print("No change")
  time.sleep(1)