Hello,
i´m almost done to get DHT22 measurement values from an ESP8266 to my HA via MQTT. I see the messages with MQTT Explorer and if i´m listening to the topic on HA
but I don´t see the entity “sensor.Temperature”
in configuration.yaml the new sensor entity is added:
sensor:
- platform: mqtt
name: "Temperature"
state_topic: "esp8266/temperature"
unit_of_measurement: "°C"
The code running on ESP should be fine:
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include "DHTesp.h" // Click here to get the library: https://github.com/beegee-tokyo/DHTesp
// WiFi
const char* ssid = "SSID";
const char* password = "PASSWORD";
const char* mqtt_server = "192.168.0.21";
#define mqtt_user "USER"
#define mqtt_password "PASSWORD"
#define ESPHostname "ESP8266"
#define temperature_topic "esp8266/temperature"
#define humidity_topic "esp8266/humidity"
#define inTopic "esp8266/inTopic"
#define outTopic "esp8266/outTopic"
WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int value = 0;
DHTesp dht;
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
// Switch on the LED if an 1 was received as first character
if ((char)payload[0] == '1') {
digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because
// it is active low on the ESP-01)
} else {
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH
}
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESP8266Client-";
clientId += String(random(0xffff), HEX);
// Attempt to connect
if (client.connect(clientId.c_str(), mqtt_user, mqtt_password)) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish(outTopic, ESPHostname);
// ... and resubscribe
client.subscribe(inTopic);
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void setup()
{
pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output
Serial.begin(115200);
//WiFi.hostname("ESP8266");
//WiFi.mode(WIFI_STA);
//WiFi.begin(ssid, password);
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
dht.setup(5, DHTesp::DHT22); // Connect DHT sensor to GPIO 17
}
void loop()
{
if (!client.connected()) {
reconnect();
}
client.loop();
delay(dht.getMinimumSamplingPeriod());
float humidity = dht.getHumidity();
float temperature = dht.getTemperature();
Serial.print(dht.getStatusString());
Serial.print("\t");
Serial.print(humidity, 1);
Serial.print("\t\t");
Serial.println(temperature, 1);
unsigned long now = millis();
if (now - lastMsg > 2000) {
lastMsg = now;
++value;
snprintf (msg, MSG_BUFFER_SIZE, "hello world #%ld", value);
Serial.print("Publish message: ");
Serial.println(msg);
//client.publish("outTopic", msg);
Serial.print("Temperature:");
Serial.println(String(temperature).c_str());
client.publish(temperature_topic, String(temperature).c_str(), true);
}
}
Do you have any hint or any idea for me, what anything else I can check?
