#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ArduinoWebsockets.h>

const char ssl_cert[]  = \
  "-----BEGIN CERTIFICATE-----\n" \
  "MIIFYDCCBEigAwIBAgIQQAF3ITfU6UK47naqPGQKtzANBgkqhkiG9w0BAQsFADA/\n" \
  "MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT\n" \
  "DkRTVCBSb290IENBIFgzMB4XDTIxMDEyMDE5MTQwM1oXDTI0MDkzMDE4MTQwM1ow\n" \
  "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n" \
  "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwggIiMA0GCSqGSIb3DQEB\n" \
  "AQUAA4ICDwAwggIKAoICAQCt6CRz9BQ385ueK1coHIe+3LffOJCMbjzmV6B493XC\n" \
  "ov71am72AE8o295ohmxEk7axY/0UEmu/H9LqMZshftEzPLpI9d1537O4/xLxIZpL\n" \
  "wYqGcWlKZmZsj348cL+tKSIG8+TA5oCu4kuPt5l+lAOf00eXfJlII1PoOK5PCm+D\n" \
  "LtFJV4yAdLbaL9A4jXsDcCEbdfIwPPqPrt3aY6vrFk/CjhFLfs8L6P+1dy70sntK\n" \
  "4EwSJQxwjQMpoOFTJOwT2e4ZvxCzSow/iaNhUd6shweU9GNx7C7ib1uYgeGJXDR5\n" \
  "bHbvO5BieebbpJovJsXQEOEO3tkQjhb7t/eo98flAgeYjzYIlefiN5YNNnWe+w5y\n" \
  "sR2bvAP5SQXYgd0FtCrWQemsAXaVCg/Y39W9Eh81LygXbNKYwagJZHduRze6zqxZ\n" \
  "Xmidf3LWicUGQSk+WT7dJvUkyRGnWqNMQB9GoZm1pzpRboY7nn1ypxIFeFntPlF4\n" \
  "FQsDj43QLwWyPntKHEtzBRL8xurgUBN8Q5N0s8p0544fAQjQMNRbcTa0B7rBMDBc\n" \
  "SLeCO5imfWCKoqMpgsy6vYMEG6KDA0Gh1gXxG8K28Kh8hjtGqEgqiNx2mna/H2ql\n" \
  "PRmP6zjzZN7IKw0KKP/32+IVQtQi0Cdd4Xn+GOdwiK1O5tmLOsbdJ1Fu/7xk9TND\n" \
  "TwIDAQABo4IBRjCCAUIwDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMCAQYw\n" \
  "SwYIKwYBBQUHAQEEPzA9MDsGCCsGAQUFBzAChi9odHRwOi8vYXBwcy5pZGVudHJ1\n" \
  "c3QuY29tL3Jvb3RzL2RzdHJvb3RjYXgzLnA3YzAfBgNVHSMEGDAWgBTEp7Gkeyxx\n" \
  "+tvhS5B1/8QVYIWJEDBUBgNVHSAETTBLMAgGBmeBDAECATA/BgsrBgEEAYLfEwEB\n" \
  "ATAwMC4GCCsGAQUFBwIBFiJodHRwOi8vY3BzLnJvb3QteDEubGV0c2VuY3J5cHQu\n" \
  "b3JnMDwGA1UdHwQ1MDMwMaAvoC2GK2h0dHA6Ly9jcmwuaWRlbnRydXN0LmNvbS9E\n" \
  "U1RST09UQ0FYM0NSTC5jcmwwHQYDVR0OBBYEFHm0WeZ7tuXkAXOACIjIGlj26Ztu\n" \
  "MA0GCSqGSIb3DQEBCwUAA4IBAQAKcwBslm7/DlLQrt2M51oGrS+o44+/yQoDFVDC\n" \
  "5WxCu2+b9LRPwkSICHXM6webFGJueN7sJ7o5XPWioW5WlHAQU7G75K/QosMrAdSW\n" \
  "9MUgNTP52GE24HGNtLi1qoJFlcDyqSMo59ahy2cI2qBDLKobkx/J3vWraV0T9VuG\n" \
  "WCLKTVXkcGdtwlfFRjlBz4pYg1htmf5X6DYO8A4jqv2Il9DjXA6USbW1FzXSLr9O\n" \
  "he8Y4IWS6wY7bCkjCWDcRQJMEhg76fsO3txE+FiYruq9RUWhiF1myv4Q6W+CyBFC\n" \
  "Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5\n" \
  "-----END CERTIFICATE-----\n";

const char triggerPin = 2; // Пин для отправки сигнала на датчик HC-SR04
const char echoPin = 4;    // Пин для получения ответа от датчика HC-SR04

WiFiClient espClient;
websockets::WebsocketsClient client;


const char* ssid = "Wokwi-GUEST";
const char* password = "";

char distance_str[10];

LiquidCrystal_I2C lcd(0x27, 20, 4); // Инициализация экрана LCD 20x4 через I2C


void setup() {
  lcd.init(); // Инициализация экрана LCD
  lcd.backlight(); // Включение подсветки экрана LCD

  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT);

  Serial.begin(115200);
  randomSeed(analogRead(0));

  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  wifiConnect();

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  
  client.setCACert(ssl_cert);

  Serial.println("Connecting to a socket");

  client.connect("wss://free.blr2.piesocket.com/v3/1?api_key=cAe4elScdtCmtiKtk3N7OJ4oE19O23mj62inMv4P&notify_self=1");
  client.onMessage(handle_message);
}

void wifiConnect() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
}

void handle_message(websockets::WebsocketsMessage message) {
  float Value = message.data().toFloat();
  lcd.clear();

  if (Value != 0 && (message.data().length() > 0)) {
    unsigned long timer = millis();
    Serial.print("Got message: ");
    Serial.println(Value);
    lcd.print(Value);
    lcd.print(" sm");
  }  
}

void loop() {
  float duration, distance;

  Serial.println(webSocket.readyState());
if(webSocket.readyState != OPEN)
{
// Попытка переподключения
   Serial.println("Attempting to reconnect...");
   client.connect("wss://free.blr2.piesocket.com/v3/1?api_key=cAe4elScdtCmtiKtk3N7OJ4oE19O23mj62inMv4P&notify_self=1");
 }

if (webSocket.readyState === WebSocket.OPEN) {
    // Соединение готово к обмену данными
} else if (webSocket.readyState === WebSocket.CONNECTING) {
    // Соединение устанавливается
} else if (webSocket.readyState === WebSocket.CLOSING) {
    // Соединение закрывается
} else if (webSocket.readyState === WebSocket.CLOSED) {
    // Соединение закрыто
}

  client.poll();


  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);

  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);

  digitalWrite(triggerPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2.0) / 29.1; // Расчет расстояния в сантиметрах

  Serial.print("відстань: ");
  Serial.print(distance);
  Serial.println(" см");

  lcd.setCursor(0, 0);

  sprintf(distance_str, "%f", distance);
  delay(1000);

  client.send(distance_str);

  delay(1000); // Задержка перед следующим измерением расстояния
}