Hi everybody! I’m having some trouble templating the value of temperature and humidity. The sensor correctly publish the message but i’m not able to let it read correctly by home assistant.
Here is my skecth in arduino ide :
#include <ESP8266WiFi.h>
#include <Wire.h>
#include <PubSubClient.h>
#include “DHT.h”
#define DHTPIN D3 // what digital pin we’re connected to NodeMCU (D3)
// Uncomment whatever type you’re using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors. This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
#define wifi_ssid “"
#define wifi_password "”
#define mqtt_server “192.168.1.200”
#define mqtt_user “"
#define mqtt_password "*”
#define humidity_topic “homeassistant/sensor/humidity/”
#define temperature_celsius_topic “homeassistant/sensor/temperature_celsius/”
#define temperature_fahrenheit_topic “homeassistant/sensor/temperature_fahrenheit”
WiFiClient espClient;
PubSubClient client(espClient);
void setup() {
Serial.begin(115200);
dht.begin();
setup_wifi();
client.setServer(mqtt_server, 1883);
}
String macToStr(const uint8_t* mac)
{
String result;
for (int i = 0; i < 6; ++i) {
result += String(mac[i], 16);
if (i < 5)
result += ‘:’;
}
return result;
}
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(wifi_ssid);
WiFi.begin(wifi_ssid, wifi_password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println(“WiFi connected”);
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
// Loop until we’re reconnected
while (!client.connected()) {
Serial.print(“Attempting MQTT connection…”);
// Generate client name based on MAC address and last 8 bits of microsecond counter
String clientName;
clientName += "esp8266-";
uint8_t mac[6];
WiFi.macAddress(mac);
clientName += macToStr(mac);
clientName += "-";
clientName += String(micros() & 0xff, 16);
Serial.print("Connecting to ");
Serial.print(mqtt_server);
Serial.print(" as ");
Serial.println(clientName);
// Attempt to connect
// If you do not want to use a username and password, change next line to
//if (client.connect((char*) clientName.c_str())) {
if (client.connect(“homeassistant”,“homeassistant”,“05081985”))
{
Serial.println(“connected”);
} else {
Serial.print(“failed, rc=”);
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
// Wait a few seconds between measurements.
delay(5000);
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
// Serial.print(hif);
// Serial.println(" *F");
Serial.print("Temperature in Celsius:");
Serial.println(String(t).c_str());
client.publish(temperature_celsius_topic, String(t).c_str(), true);
// Serial.print("Temperature in Fahrenheit:");
// Serial.println(String(f).c_str());
// client.publish(temperature_fahrenheit_topic, String(f).c_str(), true);
Serial.print("Humidity:");
Serial.println(String(h).c_str());
client.publish(humidity_topic, String(h).c_str(), true);
}
I’m not able to template correctly the two values…
Please somebody can help me? Is a week that i’m blocked…
