MQTT topic from arduino to Hassio issue

@Dmosq wrote:

Hi Guys, i’m new here and in hassio.
i’m following a tutorial to create an MQTT window sensor in arduino ESP01 and conect it to home assistant.

the thing is, i am getting the mqtt_topic in node red, the arduino is working as expected as you can see in the image i’m getting the toppic:

mqtt1150×201 14.5 KB

but i do not know how to publish it into an entity in the lovelace, i put this configuration in my configuration.yaml

sensor:
  platform: mqtt
  name: 'Window'
  state_topic: 'test/window1'
  unique_id: 'test/window1'

and indeed it is creating and entity called sensor.window_1 but the state doesn’t change, it shows “Unknown”

does anybody here can help me to solve this? is it something that i’m not doing?

thank you

code in arduino:

#include <PubSubClient.h>
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
ADC_MODE(ADC_VCC);

//USER CONFIGURED SECTION START//
const char* ssid = "MY_SSID";
const char* password = "MY_WIFI_PASSWORD";
const char* mqtt_server = "192.168.1.100";
const int mqtt_port = 1883;
const char *mqtt_user = "mqtt_user";
const char *mqtt_pass = "mqtt_password";
const char *mqtt_client_name = "windows"; // Client connections cant have the same connection name
const char *mqtt_topic = "test/window1";
IPAddress ip(192, 168, 1, 50); 
IPAddress gateway(192, 168, 1, 1); 
IPAddress subnet(255, 255, 255, 0);
//USER CONFIGURED SECTION END//


WiFiClient espClient;
PubSubClient client(espClient);

// Variables
bool boot = true;
char batteryVoltageMQTT[50];

//Functions

void setup_wifi() 
{
  WiFi.config(ip, gateway, subnet);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) 
    {
      delay(50);
    }
}

void reconnect() 
{
  while (!client.connected()) 
  {
      int battery_Voltage = ESP.getVcc() + 600;
      String temp_str = String(battery_Voltage);
      String mqttString = temp_str + "mV Replace Battery";
      mqttString.toCharArray(batteryVoltageMQTT, mqttString.length() + 1);
      if (battery_Voltage <= 2900)
      {
        //boolean connect (clientID, username, password, willTopic, willQoS, willRetain, willMessage)
        if (client.connect(mqtt_client_name, mqtt_user, mqtt_pass, mqtt_topic, 0, 1, batteryVoltageMQTT)) 
        {
        
          if(boot == true)
          {
            client.publish(mqtt_topic,"open");
            boot = false;
          }
        } 
        else 
        {
          ESP.restart();
        }
      }
      if (battery_Voltage > 2900)
      {
        if (client.connect(mqtt_client_name, mqtt_user, mqtt_pass, mqtt_topic, 0, 1, "closed")) 
        {
          if(boot == true)
          {
            client.publish(mqtt_topic,"open");
            boot = false;
          }
        } 
        else 
        {
          ESP.restart();
        }
      }
  }
}

void setup() 
{
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}

void loop() 
{
  
  if (boot == true) 
  {
    reconnect();
  }
  else
  {
  ESP.deepSleep(0);
  }
}

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