Hi , I know how to plublish a topic : but this far i have only beeen publishing text not actual value that can change over time
tried this //
// hum = dht.readHumidity();// Valeur de l’humidite
temp= dht.readTemperature(); //Valeur de la temperature
client.publish(tempTopic,temp);
delay(50);
}
but it doesn’t work said i can’t directly publish the value
so i tried this
//
// hum = dht.readHumidity();// Valeur de l’humidite
temp= dht.readTemperature(); //Valeur de la temperature
client.publish(tempTopic,String(temp));
delay(50);
}
All i am getting is NAN because is doesn’t see value
the whole code is down here . The door sensor is ok i receive 'closed ’ and ‘open’ messages but i just can’t publish the value of the temperature
#include <ESP8266WiFi.h>
#include <MQTTClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <ESP8266HTTPUpdateServer.h>
#include <DHT.h>;
#include <Adafruit_Sensor.h>
/* ---------- DO NOT EDIT ANYTHING ABOVE THIS LINE ---------- */
//Only edit the settings in this section
/* WIFI Settings /
// Name of wifi network
const char ssid = “Lamtoro-Guests”;
// Password to wifi network
const char* password = “1234567890”;
/* Web Updater Settings /
// Host Name of Device
const char host = “MK-DoorSensor1”;
// Path to access firmware update page (Not Neccessary to change)
const char* update_path = “/firmware”;
// Username to access the web update page
const char* update_username = “admin”;
// Password to access the web update page
const char* update_password = “admin”;
/* MQTT Settings /
// Topic which listens for commands
char outTopic = “/FrontDoor/DoorSensor”;
char* tempTopic = “/FamilyRoom/Temperature”;
//MQTT Server IP Address
const char* server = “192.168.1.43”;
//Unique device ID
const char* mqttDeviceID = “MK-SmartHouseDevice1”;
/* ---------- DO NOT EDIT ANYTHING BELOW THIS LINE ---------- */
//the time when the sensor outputs a low impulse
long unsigned int lowIn;
//the amount of milliseconds the sensor has to be low
//before we assume all detection has stopped
long unsigned int pause = 100;
//sensor variables
boolean lockLow = true;
boolean takeLowTime;
//the digital pin connected to the door sensor’s output
int sensorPin = 2;
// Temperature sensor constants
#define DHTPIN 16 // Numero de pin du capteur de temperature
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE); //// Initialisee le capteur DHT ( 16mhz Arduino )
//Variables
int chk;
float hum; //Stock la valeur de l’humidité
float temp; //Stock la valeur de la temperature
unsigned long previousMillis = 0;
unsigned long interval = 5000;
//webserver
ESP8266WebServer httpServer(80);
ESP8266HTTPUpdateServer httpUpdater;
//MQTT
WiFiClient net;
MQTTClient client;
//Time Variable
unsigned long lastMillis = 0;
//Connect to WiFI and MQTT
void connect();
void messageReceived(String &topic, String &payload)
{
//This sensor does not recieve anything from MQTT Server so this is blank
}
//Setup pins, wifi, webserver and MQTT
void setup()
{
pinMode(sensorPin, INPUT);
digitalWrite(sensorPin, LOW);
pinMode(DHTPIN, INPUT);
digitalWrite(DHTPIN, LOW);
dht.begin();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
client.begin(server, net);
client.onMessage(messageReceived);
connect();
MDNS.begin(host);
httpUpdater.setup(&httpServer, update_path, update_username, update_password);
httpServer.begin();
MDNS.addService(“http”, “tcp”, 80);
}
//Connect to wifi and MQTT
void connect()
{
while (WiFi.status() != WL_CONNECTED)
{
delay(1000);
}
while (!client.connect(mqttDeviceID))
{
delay(1000);
}
}
void loop()
{
// MQTT Loop
client.loop();
delay(10);
// Make sure device is connected
if(!client.connected())
{
connect();
}
httpServer.handleClient();
//Sensor Detection
if(digitalRead(sensorPin) == HIGH)
{
if(lockLow)
{
//makes sure we wait for a transition to LOW before any further output is made:
lockLow = false;
client.publish(outTopic, “OPEN”);
delay(50);
}
takeLowTime = true;
}
if(digitalRead(sensorPin) == LOW)
{
if(takeLowTime)
{
lowIn = millis(); //save the time of the transition from high to LOW
takeLowTime = false; //make sure this is only done at the start of a LOW phase
}
//if the sensor is low for more than the given pause,
//we assume that no more detection is going to happen
if(!lockLow && millis() - lowIn > pause)
{
//makes sure this block of code is only executed again after
//a new detection sequence has been detected
lockLow = true;
client.publish(outTopic, “CLOSED”);
delay(50);
}
}
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
//
// hum = dht.readHumidity();// Valeur de l’humidite
temp= dht.readTemperature(); //Valeur de la temperature
client.publish(tempTopic,String(temp));
delay(50);
}
}
