// #include <WiFi.h>
// #include <Arduino_MQTT_Client.h>
// #include <ThingsBoard.h>
// #include <ArduinoHttpClient.h>
// #include <PubSubClient.h>
// //wEMf0jwzVpqmZ06TaQ4T

// #define TB_SERVER "thingsboard.cloud"
// #define TB_TOKEN "wEMf0jwzVpqmZ06TaQ4T"

// constexpr uint16_t MAX_MESSAGE_SIZE = 128U;

// //Name of router and password
// const char* ssid="Wokwi-GUEST";
// const char* password="";

// WiFiClient espClinet;
// Arduino_MQTT_Client mqttClient(espClinet);
// ThingsBoard tb(mqttClient, MAX_MESSAGE_SIZE);

// const int trigPin = 17;
// const int echoPin = 18;
// #define SOUND_SPEED 0.034
// #define CM_TO_INCH 0.393701
// long duration;
// int distanceCm;
// int distanceInch;


// void setup() {
//   // put your setup code here, to run once:
//   Serial.begin(115200);
//   pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
//   pinMode(echoPin, INPUT); 
//   WiFi.begin(ssid,password);
//   Serial.println("connecting to wifi.......");
//   //conect divice wifi
//   while (WiFi.status() != WL_CONNECTED){
//     delay(500);
//     Serial.print(".");
//   } 
   
//   Serial.println("");
//   Serial.println("connected");
//   Serial.print("WiFi Address: ");
//   Serial.println(WiFi.localIP());

//   Serial.println("connecting to ThingsBoard Server.......");
//   while(!tb.connect(TB_SERVER, TB_TOKEN)){
//     Serial.println("Failed to connect");
//     delay(500);  
//   }
//   Serial.println("connected to ThingsBoard");
// }

// void loop() {
//    // Clears the trigPin
//   digitalWrite(trigPin, LOW);
//   delayMicroseconds(2);
//   // Sets the trigPin on HIGH state for 10 micro seconds
//   digitalWrite(trigPin, HIGH);
//   delayMicroseconds(10);
//   digitalWrite(trigPin, LOW);
  
//   // Reads the echoPin, returns the sound wave travel time in microseconds
//   duration = pulseIn(echoPin, HIGH);
  
//   // Calculate the distance
//   distanceCm = duration * SOUND_SPEED/2;
  
//   // Convert to inches
//   distanceInch = distanceCm * CM_TO_INCH;
  
//   // Prints the distance in the Serial Monitor
//   Serial.print("Distance (cm): ");
//   Serial.println(distanceCm);

//   String jsonData = "{\"distance\":"+String(distanceCm)+"}";
//   tb.sendTelemetryJson(jsonData.c_str());
//   Serial.println("Data is passed to ThingsBoard");
//   delay(1000);
  
// }
#include <WiFi.h>
#include <ThingsBoard.h>
#include <Arduino_MQTT_Client.h>
#include <ArduinoHttpClient.h>
#include <PubSubClient.h>
//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

#define TB_SERVER "thingsboard.cloud"
// #define TB_TOKEN "wEMf0jwzVpqmZ06TaQ4T"
#define TB_TOKEN "hckahh54nuw6ngj7daiy"
const int trigPin = 17;
const int echoPin = 18;
#define WIFI_AP "Wokwi-GUEST"
#define WIFI_PASS ""
constexpr uint16_t MAX_MESSAGE_SIZE = 128U;
// Sensor -> ESP32 -> WiFi Client -> Arduino_MQTT_Client -> TB 
WiFiClient espClient;
Arduino_MQTT_Client mqttClient(espClient);
ThingsBoard tb(mqttClient, MAX_MESSAGE_SIZE);
long duration;
float distanceCm;
float distanceInch;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.begin(115200); // Starts the serial communication
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  // Connect to WiFi
  WiFi.begin(WIFI_AP, WIFI_PASS);
  Serial.println("Connecting to WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  // Connect to ThingsBoard
  Serial.println("Connecting to ThingsBoard Server....");
  // 2 parameters - 1. TB_Server 2. TB_Token
  while(!tb.connect(TB_SERVER, TB_TOKEN)) {
    Serial.println("Failed to connect to ThingsBoard...");
    delay(500);
  }
  Serial.println("Connected to ThingsBoard...");
}

void loop() {
   // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  
  // Convert to inches
  distanceInch = distanceCm * CM_TO_INCH;
// Prints the distance in the Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  // Serial.print("Distance (inch): ");
  // Serial.println(distanceInch);
  // Send date to TB
  String jsonData = "{\"Distance\":"+ String(distanceCm) +"}";
  tb.sendTelemetryJson(jsonData.c_str());
  Serial.println("Data is passed to ThingsBoard");
  // String jsonData1 = "{\"Distance_INCH\":"+ String(distanceInch) +"}";
  // tb.sendTelemetryJson(jsonData1.c_str());
  // Serial.println("Data is passed to ThingsBoard");


  delay(1000);
 
}