#include <WiFi.h>
#include <ThingsBoard.h>
#include <Arduino_MQTT_Client.h>
#include <ArduinoHttpClient.h>
#include <PubSubClient.h>
#include <DallasTemperature.h>
#include <OneWire.h>

int sensorPin = 14;

OneWire oneWire (sensorPin);  // creates the OneWire object using a specific pin
DallasTemperature sensor (&oneWire);
//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"
const int trigPin = 16;
const int echoPin = 17;
#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);
  sensor.begin ();
  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");


  delay(1000);
  sensor.requestTemperatures ();
  float temp = sensor.getTempCByIndex (0);
  Serial.print ("Temperature: ");
  Serial.print (temp);
  Serial.println ("ºC");
  delay (3000);
  String jsonData1 = "{\"Temperature\":"+ String(temp) +"}";
  tb.sendTelemetryJson(jsonData1.c_str());
  Serial.println("Data is passed to ThingsBoard");
 
}