#include <WiFi.h>
#include <PubSubClient.h>
#include <WiFiClientSecure.h>


const char* ssid = "WIFI";
const char* password = "";
const char* mqtt_server = "mqtt.thingsboard.cloud";
const int mqtt_port = 1883;
const char* token = "vGXdNnU8xbHqIOUJfZGB"; 
const char* topic = "v1/devices/me/telemetry";


WiFiClientSecure espClient;
PubSubClient client(espClient);

const int sensorPin = 15;
const float thresholdCurrent = 3.0;  // Simulated threshold

void setup_wifi() {
  delay(100);
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESP32Client")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}


void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  int rawValue = analogRead(sensorPin);
  float voltage = rawValue * (3.3 / 4095.0);
  float current = (voltage - 1.65) / 0.185;  // Simulating ACS712

  char msg[100];
  snprintf(msg, sizeof(msg), "{\"current\": %.2f}", current);
  client.publish(topic, msg);

  Serial.print("Current: ");
  Serial.print(current);
  Serial.println(" A");

  if (current > thresholdCurrent) {
    client.publish(topic, "⚠️ High energy consumption detected!");
  }

  delay(2000);  // Send every 2 seconds
}