ESP32 Forum

Code: Select all

 #include <Adafruit_Sensor.h>
//#include "DHT.h"
#include <WiFi.h>
#include <PubSubClient.h>
#include "SparkFunHTU21D.h"
//Create an instance of the object
HTU21D myHumidity;

const char* ssid = "skynet";
const char* password = "Sexyfrog9919";
const char* mqttServer = "192.168.0.196";
const int mqttPort = 1883;
const char* mqttUser = "ojosbourne";
const char* mqttPassword = "Skingsking9919";

#define temperature_topic "topic/temp"       //Topic temperature
#define humidity_topic "topic/humid"         //Topic humidity
//#define debug_topic "debug"                   //Topic for debugging


//here we use pin IO23 of ESP32 to read data
//#define DHTPIN 14
//our sensor is DHT22 type
//#define DHTTYPE DHT22
//create an instance of DHT sensor
//DHT dht(DHTPIN, DHTTYPE);

WiFiClient espClient;
PubSubClient client(espClient);


void setup() {
//void setup() (

//   connect to wifi 



Serial.begin(115200);
WiFi.begin(ssid, password);
 
while (WiFi.status() != WL_CONNECTED) {
delay(200);
Serial.println("Connecting to WiFi..");
}
 
Serial.println("Connected to the WiFi network");
 // connect to mqtt
 
client.setServer(mqttServer, mqttPort);
 
while (!client.connected()) {
Serial.println("Connecting to MQTT...");
 
if (client.connect("ESP32Client", mqttUser, mqttPassword )) {
 
Serial.println("connected");
 
} else {
 
Serial.print("failed with state ");
Serial.print(client.state());
delay(200);
 
}
//}

  
  //Serial.begin(115200);
  //Serial.println("DHT22 sensor!");
  //call begin to start sensor
  //dht.begin();

  Serial.println("HTU21D Example!");

  myHumidity.begin();
}

}
 



void loop() {

  float h = myHumidity.readHumidity();
  float t = myHumidity.readTemperature();

  
  //use the functions which are supplied by library.
  //float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  //float t = dht.readTemperature();
  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from htu21d sensor!");
    return;
  }
  // print the result to Terminal
  //client.publish(humidity_topic, (h));
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
 // client.publish(temperature_topic, (t));
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *C ");

   // Publish values to MQTT topics
    client.publish(temperature_topic, String(t).c_str(), true);   // Publish temperature on mosohomes/temp1
    //if ( debug ) {    
      Serial.println("Temperature sent to MQTT.");
    //}
    delay(200); //some delay is needed for the mqtt server to accept the message
    
    client.publish(humidity_topic, String(h).c_str(), true);      // Publish humidity on mosohomes/humid1
    
    //if ( debug ) {
                  Serial.println("Humidity sent to MQTT.");
                 //}
  //we delay a little bit for next read
  delay(10000);
}