添加传感器到HomeAssistant

发表于 更新于

之前的工作看这里

修改homeassistantconfiguration.yaml

编辑/docker/homeassistantconfiguration.yaml在末尾加入

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sensor:
  - platform: mqtt
    state_topic: "esp/sensor1"
    name: 'Temperature'
    unit_of_measurement: '°C'
    value_template: '{{ value_json.Temperature }}'
  - platform: mqtt
    state_topic: "esp/sensor1"
    name: 'Humidity'
    unit_of_measurement: '%'
    value_template: '{{ value_json.Humidity }}'
    device_class: humidity

esp8266程序

将DHT22连接到NodeMCU的D2口也就是IO4上
烧写程序如下

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#include <ESP8266WiFi.h>
#include <PubSubClient.h>

#include <ArduinoJson.h>

#include "DHT.h"
#define DHTPIN 4
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

// Update these with values suitable for your network.
const char* ssid = "xxx";
const char* password = "xxx";
const char* mqtt_server = "xxx.xxx.xxx.xxx";
const char* mqtt_topic = "esp/sensor1";


WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(9600);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  dht.begin();
}

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, 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...");
    // Attempt to connect
    if (client.connect("arduinoClient")) {
    //if (client.connect("arduinoClient", mqtt_user, mqtt_password)) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.subscribe("esp/#");
    } 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(2000);
	float h = dht.readHumidity();
	float t = dht.readTemperature();
	if (isnan(h) || isnan(t)) {
		Serial.println("Failed to read from DHT sensor!");
		return;
	}
	//Serial.print("Humidity: ");
	//Serial.print(h);
	//Serial.print(" %\t");
	//Serial.print("Temperature: ");
	//Serial.print(t);
	//Serial.print(" *C ");
  
	StaticJsonBuffer<300> JSONbuffer;   //Declaring static JSON buffer
	JsonObject& JSONencoder = JSONbuffer.createObject(); 
	JSONencoder["Humidity"] = h;
	JSONencoder["Temperature"] = t;
	//JsonObject& data = JSONencoder.createNestedObject("data");
	//data.set("Humidity", h);
	//data.set("Temperature", t);
	
	char JSONmessageBuffer[300];
	JSONencoder.prettyPrintTo(JSONmessageBuffer, sizeof(JSONmessageBuffer));
	Serial.println(JSONmessageBuffer);

	boolean isOK = client.publish(mqtt_topic, JSONmessageBuffer, true);
	Serial.println(isOK);
}

测试

在开发者工具/MQTT中
订阅主题Topic为esp/sensor1
注意监听

在主页面中右上角选择配置UI
在右下角选择添加卡片
在实体里选择sensor.temperature和sensor.humidity
完成添加到主页

在iPhone的家庭APP里可以看到

注意

湿度传感器需要在修改homeassistantconfiguration.yaml的时候加入device_class: humidity
Device Class支持的传感器类型有

None: Generic sensor. This is the default and doesn’t need to be set.
battery: Percentage of battery that is left.
humidity: Percentage of humidity in the air.
illuminance: The current light level in lx or lm.
signal_strength: Signal strength in dB or dBm.
temperature: Temperature in °C or °F.
power: Power in W or kW.
pressure: Pressure in hPa or mbar.
timestamp: Datetime object or timestamp string.