Envoyer des données (température et humidité) vers thingspeak.com en utilisant ESP32

Programme en micropython

thingspeak.py

from simple import MQTTClient

import network

import time

from time import sleep

from machine import Pin

WiFi_SSID = “**********”

WiFi_PASS = “*************”

SERVER = “mqtt.thingspeak.com”

client = MQTTClient(“umqtt_client”, SERVER) CHANNEL_ID = “********” WRITE_API_KEY = “***************”

p23=Pin(23, Pin.IN)

d=dht.DHT11(p23)

def do_connect():

  wlan = network.WLAN(network.STA_IF)

  wlan.active(True)

      if not wlan.isconnected():

           print(‘connecting to network…’)

           wlan.connect(WiFi_SSID, WiFi_PASS)

           while not wlan.isconnected():

              pass print(‘network config:’, wlan.ifconfig())

do_connect()

topic = “channels/” + CHANNEL_ID + “/publish/” + WRITE_API_KEY

while True:

  d.measure()

  t=d.temperature() #lire la temperature

  h=d.humidity() #lire l’humidite

  payload = “field1=”+str(t)+”&field2=”+str(h)
 

  client.connect()

  client.publish(topic, payload) # envoyer les valeurs de la temperature et l’humidite au site thingspeak.com

  client.disconnect()

  time.sleep(60) #attendre 1 minute

Remarque: il faut importer la bibliothèque suivante: simple.py