Websocket Arduino UNO WiFi rev 2

Projects Programming
1

Am trying to get my Arduino UNO WiFi rev 2 to work as a server and send the tempretur as a js package to a client.

When using the WebSockets Library 1.3.0 by Markus Sattler I always get the message that the client is not connected and the Loop repeat it.

am new to this so i tried this as well just to see what it can do but also did not work.
KayPebble/WebSocket_WiFiRev2

this is my Code

#include <WiFiNINA.h>
#include <WebSocketsServer.h>
#include <ArduinoJson.h>

// Constants
char ssid[] = "POC";
char password[] = "1213";
const int WEBSOCKET_PORT = 80;
const int sensorPin = A0;  // Pin, an dem der Temperatursensor angeschlossen ist

// Globals
WebSocketsServer webSocket = WebSocketsServer(WEBSOCKET_PORT);

// Function declarations
void connectToWiFi();
void printWiFiStatus();
void startWebSocketServer();
void handleWebSocketEvent(uint8_t num, WStype_t type, uint8_t *payload, size_t length);
void sendTemperatureJSON(uint8_t num);

void setup() {
  // Start Serial port
  Serial.begin(9600);

  // Connect to WiFi
  connectToWiFi();

  // Print WiFi status and IP address
  printWiFiStatus();

  // Start WebSocket server and assign callback
  startWebSocketServer();
}

void loop() {
  // Look for and handle WebSocket data
  webSocket.loop();

  // Read temperature and send to connected clients
  sendTemperatureJSON(0);  // Change to the actual client number if needed
  delay(5000);  // Adjust delay as needed
}

void connectToWiFi() {
  Serial.println("\nConnecting to WiFi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
}

void printWiFiStatus() {
  Serial.println("\nConnected to WiFi");
  Serial.print("My IP address: ");
  Serial.println(WiFi.localIP());
}

void startWebSocketServer() {
  webSocket.begin();
  webSocket.onEvent(handleWebSocketEvent);
}

void handleWebSocketEvent(uint8_t num, WStype_t type, uint8_t *payload, size_t length) {
  // Figure out the type of WebSocket event
  switch (type) {
    case WStype_DISCONNECTED:
      Serial.println("Client disconnected!");
      break;

    case WStype_CONNECTED:
      Serial.println("Client connected!");
      break;

    case WStype_TEXT:
      Serial.print("Text received: ");
     Serial.println(reinterpret_cast<char*>(payload));
      
      break;

    default:
      break;
  }
}

void sendTemperatureJSON(uint8_t num) {
  // Read temperature from sensor
  int sensorValue = analogRead(sensorPin);
  float temperature = (sensorValue / 1024.0) * 5000 / 10;  // LM35 sensor calibration

  // Create a JSON object
  StaticJsonDocument<128> jsonDocument;
  jsonDocument["temperature"] = temperature;

  // Serialize the JSON object to a string
  String jsonString;
  serializeJson(jsonDocument, jsonString);

  // Send the JSON string to the client
  webSocket.sendTXT(num, jsonString);
}
2

Is the client a PC, another Arduino, what?

3

the Client should be PC

4

Post your javascript file.