добавляет MQTT Discovery

.gitignore

@@ -4,4 +4,4 @@
 .vscode/launch.json
 .vscode/ipch
 
-src/config.h
+include/config.h

include/config.h.tmpl

@@ -11,6 +11,4 @@
 #define DHTPIN D4     // pin gpio 2 in sensor
 #define DHTTYPE DHT22 // DHT 22 Change this if you have a DHT11
 
-#define CLIENT_ID "CLIENT_ID_HERE"
-#define HUMIDITY_TOPIC "sensor/humidity"
-#define TEMPERATURE_TOPIC "sensor/temperature"
+#define HOMEASSISTANT_TOPIC "homeassistant/sensor/sensorDht"

include/utils.h

@@ -0,0 +1,6 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+double round2(double value);
+
+#endif

platformio.ini

@@ -17,4 +17,5 @@ lib_deps =
 	jfturcot/SimpleTimer@0.0.0-alpha+sha.b30890b8f7
 	adafruit/Adafruit Unified Sensor@^1.1.5
 	knolleary/PubSubClient@^2.8
+	bblanchon/ArduinoJson@^6.19.4
 monitor_speed = 115200

src/main.cpp

@@ -2,13 +2,74 @@
 #include <DHT.h>
 #include <ESP8266WiFi.h>
 #include <PubSubClient.h>
-
+#include <ArduinoJson.h>
 #include <config.h>
+#include <utils.h>
 
 WiFiClient espClient;
 PubSubClient client(espClient);
 DHT dht(DHTPIN, DHTTYPE);
 
+void setup_wifi();
+void reconnect();
+void mqtt_callback(char* topic, byte* payload, unsigned int length);
+void mqtt_publish_config();
+void mqtt_publish_state();
+
+float temp;
+float hum;
+long lastMsg = 0;
+
+void setup() {
+  Serial.begin(115200);
+  setup_wifi();
+
+  WiFi.setAutoReconnect(true);
+  WiFi.persistent(true);
+
+  client.setServer(MQTT_SERVER, MQTT_PORT);
+  client.setCallback(mqtt_callback);
+
+  if (!client.connected()) {
+    reconnect();
+  }
+  client.subscribe("homeassistant/status");
+
+  mqtt_publish_config();
+
+  dht.begin();
+
+  if (WiFi.status() == WL_CONNECTED) {
+    temp = dht.readTemperature();
+    hum = dht.readHumidity();
+
+    mqtt_publish_state();
+  }
+}
+
+void loop() {
+  if (!client.connected()) {
+    reconnect();
+  }
+  client.loop();
+
+  temp = round2(dht.readTemperature());
+  hum = round2(dht.readHumidity());
+  mqtt_publish_state();
+
+  delay(60000);
+}
+
+void mqtt_callback(char* topic, byte* payload, unsigned int length) {
+  if (strcmp(topic, "homeassistant/status") == 0) {
+    payload[length] = '\0';
+    if (strcmp((char*)payload, "online") == 0) {
+      Serial.println("Home Assistant is online");
+      mqtt_publish_config();
+    }
+  }
+}
+
 void setup_wifi() {
   delay(10);
   // We start by connecting to a WiFi network
@@ -48,49 +109,45 @@ void reconnect() {
   }
 }
 
-bool checkBound(float newValue, float prevValue, float maxDiff) {
-  return !isnan(newValue) &&
-         (newValue < prevValue - maxDiff || newValue > prevValue + maxDiff);
+void mqtt_publish_config() {
+  StaticJsonDocument<256> doc;
+  char buffer[256];
+
+  doc["device_class"] = "temperature";
+  doc["name"] = "Temperature";
+  doc["unit_of_meas"] = "°C";
+  doc["state_topic"] = HOMEASSISTANT_TOPIC"/state";
+  doc["value_template"] = "{{value_json.temperature}}";
+  doc["unique_id"] = "t";
+
+  serializeJson(doc, buffer);
+
+  client.publish(HOMEASSISTANT_TOPIC"/t/config", buffer, true);
+
+  doc["device_class"] = "humidity";
+  doc["name"] = "Humidity";
+  doc["unit_of_meas"] = "%";
+  doc["state_topic"] = HOMEASSISTANT_TOPIC"/state";
+  doc["value_template"] = "{{value_json.humidity}}";
+  doc["unique_id"] = "h";
+
+  serializeJson(doc, buffer);
+
+  client.publish(HOMEASSISTANT_TOPIC"/h/config", buffer, true);
 }
 
-long lastMsg = 0;
-float temp = 0.0;
-float hum = 0.0;
-float diff = 1.0;
+void mqtt_publish_state() {
+  Serial.println("===== Sending Data =====");
+  StaticJsonDocument<256> doc;
+  char buffer[256];
 
-void setup() {
-  Serial.begin(115200);
-  setup_wifi();
-  client.setServer(MQTT_SERVER, MQTT_PORT);
+  doc["temperature"] = round2(temp);
+  doc["humidity"] = round2(hum);
 
-  dht.begin();
-}
+  Serial.printf("Temperature: %f\n", round2(temp));
+  Serial.printf("Humidity: %f\n", round2(hum));
 
-void loop() {
-  if (!client.connected()) {
-    reconnect();
-  }
-  client.loop();
+  serializeJson(doc, buffer);
 
-  long now = millis();
-  if (now - lastMsg > 10000) {
-    lastMsg = now;
-
-    float newTemp = dht.readTemperature();
-    float newHum = dht.readHumidity();
-
-    if (checkBound(newTemp, temp, diff)) {
-      temp = newTemp;
-      Serial.print("New temperature:");
-      Serial.println(String(temp).c_str());
-      client.publish(TEMPERATURE_TOPIC, String(temp).c_str(), true);
-    }
-
-    if (checkBound(newHum, hum, diff)) {
-      hum = newHum;
-      Serial.print("New humidity:");
-      Serial.println(String(hum).c_str());
-      client.publish(HUMIDITY_TOPIC, String(hum).c_str(), true);
-    }
-  }
+  client.publish(HOMEASSISTANT_TOPIC"/state", buffer, true);
 }

src/utils.cpp

@@ -0,0 +1,3 @@
+double round2 (double value) {
+   return (int)(value * 100 + 0.5) / 100.0;
+}