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[Question] #9

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qlalfdu opened this issue May 7, 2021 · 1 comment
Closed

[Question] #9

qlalfdu opened this issue May 7, 2021 · 1 comment
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Support Library support wontfix This will not be worked on

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@qlalfdu
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qlalfdu commented May 7, 2021 •
edited by khoih-prog
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I need to use ESP32 as a websocket over ethernet without wifi.
The environment cannot use wifi.
I need a websocket connection from my laptop to ESP32 via ethernet.
How can this be possible?
Even if I try to change the example, the server is connected and the web page is loaded, but the websocket cannot be connected.

Thank you in advance.

#include <SPI.h>
#include <Ethernet.h>
#include <EthernetWebServer.h>
#include <WebSocketsServer_Generic.h>
EthernetWebServer server(80);
WebSocketsServer webSocket = WebSocketsServer(81);

void webSocketEvent(uint8_t num, WStype_t type, uint8_t * payload, size_t length)
{
  switch (type)
  {
    case WStype_DISCONNECTED:
      Serial.println( "[" + String(num) + "] Disconnected!");
      break;
    case WStype_CONNECTED:
      {
        IPAddress ip = webSocket.remoteIP(num);
        Serial.printf("[%u] Connected from %d.%d.%d.%d url: %s\n", num, ip[0], ip[1], ip[2], ip[3], payload);

        // send message to client
        webSocket.sendTXT(num, "Connected");
      }
      break;
    case WStype_TEXT:
      Serial.println( "[" + String(num) + "] get Text: " + String((char *) payload));

      if (payload[0] == '#')
      {
        // we get RGB data

        // decode rgb data
        uint32_t rgb = (uint32_t) strtol((const char *) &payload[1], NULL, 16);
      }
      break;

    default:
      break;
  }
}

void setup() {
  WiFi.mode(WIFI_AP_STA);  //Infinite reboot prevention
  Serial.begin(115200);
  Ethernet.init (5);
  byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
  Ethernet.begin(mac);
  Serial.print("WebSockets Server @ IP address: ");
  Serial.println(Ethernet.localIP());

  webSocket.begin();
  webSocket.onEvent(webSocketEvent);
  server.on("/", []()
  {
    // send index.html
    server.send(200, "text/html", "<html><head><script>var connection = new WebSocket('ws://'+location.hostname+':81/', ['arduino']); connection.onopen = function () {  connection.send('Connect ' + new Date()); }; connection.onerror = function (error) {    console.log('WebSocket Error ', error);};connection.onmessage = function (e) {  console.log('Server: ', e.data);};function sendRGB() {  var r = parseInt(document.getElementById('r').value).toString(16);  var g = parseInt(document.getElementById('g').value).toString(16);  var b = parseInt(document.getElementById('b').value).toString(16);  if(r.length < 2) { r = '0' + r; }   if(g.length < 2) { g = '0' + g; }   if(b.length < 2) { b = '0' + b; }   var rgb = '#'+r+g+b;    console.log('RGB: ' + rgb); connection.send(rgb); }</script></head><body>LED Control:<br/><br/>R: <input id=\"r\" type=\"range\" min=\"0\" max=\"255\" step=\"1\" oninput=\"sendRGB();\" /><br/>G: <input id=\"g\" type=\"range\" min=\"0\" max=\"255\" step=\"1\" oninput=\"sendRGB();\" /><br/>B: <input id=\"b\" type=\"range\" min=\"0\" max=\"255\" step=\"1\" oninput=\"sendRGB();\" /><br/></body></html>");
  });
  server.begin();
}

void loop()
{
  unsigned long t = millis();
  webSocket.loop();
  server.handleClient();
}

PN20-1357
@khoih-prog
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This WebSockets library only works for ESP826/EP32 using native WiiFi. Check Important Notes. I suggest you try the WebSockets2_Generic Library.

Important Notes

  1. Currently, the WebSocketServer feature is usable only for ESP8266/ESP32 using native WiFi.
  2. The timeline when to fix and reintroduce the WebSocketServer feature to other boards is not determined yet.
  3. Please use the new WebSockets2_Generic Library if WebSocketServer is necessary. See Issue 2, Issue 3 and Issue 4

@khoih-prog khoih-prog added Support Library support wontfix This will not be worked on labels May 7, 2021
Repository owner deleted a comment from Shivdoke39 Nov 30, 2022
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@qlalfdu @khoih-prog