//
// Can ESP32 read data from Home Assistant? Reading "Inverter Active Power" from Home Assistant connected to Huawei SUN2000-5KTL-L1 inverter
//
//  https://youtu.be/p7ZOHrjYuNU
//

#include <ArduinoJson.h>
#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "YOUR WIFI SSID";
const char* password = "YOUR WIFI PASSWORD";

const char* haApiUrl = "http://XXX.XXX.XXX.XXX:8123/api/states/XXXXXXXXX_SENSOR_NAME_XXXXXXX";
// EXAMPLE
// const char* haApiUrl = "http://192.168.0.103:8123/api/states/sensor.inverter_active_power";

const char* haApiToken = "XXXXX HOME ASSISTANT TOKEN XXXXXXXXXXXXXXXXXXXXX";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Conectare la reteaua WIFI...");
  }

  Serial.println("Conectat la Wifi!");
}

void loop() {
  HTTPClient http;
  http.begin(haApiUrl);
  http.addHeader("Authorization", "Bearer " + String(haApiToken));

  int httpCode = http.GET();

  if (httpCode > 0) {
    String payload = http.getString();

    DynamicJsonDocument doc(1024);
    deserializeJson(doc, payload);

    float currentProduction = doc["state"].as<float>();

    Serial.print("Productia curenta: ");
    Serial.println(currentProduction);
  } else {
    Serial.println("Eroare la solicitarea HTTP");
  }

  http.end();

  delay(5000);
}