/*************************************************************
   Bridge Health Monitoring System
   Hardware : ESP32 + Analog Vibration Sensor
   Platform : Blynk IoT
*************************************************************/

#define BLYNK_TEMPLATE_ID "YOUR_TEMPLATE_ID"
#define BLYNK_TEMPLATE_NAME "Bridge Monitoring"
#define BLYNK_AUTH_TOKEN "YOUR_AUTH_TOKEN"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

// Wi-Fi Credentials
char ssid[] = "YOUR_WIFI_NAME";
char pass[] = "YOUR_WIFI_PASSWORD";

// Analog Vibration Sensor Pin
#define SENSOR_PIN 34

// Threshold Value
int threshold = 2000;

void setup()
{
  Serial.begin(115200);

  pinMode(SENSOR_PIN, INPUT);

  // Connect to Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  Serial.println("------------------------------------");
  Serial.println("Bridge Health Monitoring System");
  Serial.println("ESP32 Connected Successfully");
  Serial.println("------------------------------------");
}

void loop()
{
  Blynk.run();

  // Read Analog Sensor Value
  int vibration = analogRead(SENSOR_PIN);

  // Print on Serial Monitor
  Serial.print("Vibration Value : ");
  Serial.println(vibration);

  // Send Sensor Value to Blynk
  Blynk.virtualWrite(V0, vibration);

  // Check Bridge Condition
  if (vibration > threshold)
  {
    // LED ON
    Blynk.virtualWrite(V1, 1);

    // Display Bridge Status
    Blynk.virtualWrite(V2, "High Vibration Detected");

    Serial.println("Bridge Condition : HIGH VIBRATION");
  }
  else
  {
    // LED OFF
    Blynk.virtualWrite(V1, 0);

    // Display Bridge Status
    Blynk.virtualWrite(V2, "Bridge Condition Normal");

    Serial.println("Bridge Condition : NORMAL");
  }

  delay(500);
}