ATmega2560 with Ethernet Shield Can't connect to Server.

[vvent7]

I'm using an arduino with ATmega2560 with Ethernet shield. I'm using version 1.3, trying to connect to a NodeJs websocket server. On server side, I'm using express-ws, which uses ws.

I tried to connect to the server with my computer and my phone. Everything went fine.

However, when I tried to connect with arduino, I got this error on the server:

RangeError: Invalid WebSocket frame: RSV2 and RSV3 must be clear
    at Receiver.getInfo (/media/theneverchosen/MyDocs/Documents/DevSpace/Projects/remote-lab-back/node_modules/ws/lib/receiver.js:171:14)
    at Receiver.startLoop (/media/theneverchosen/MyDocs/Documents/DevSpace/Projects/remote-lab-back/node_modules/ws/lib/receiver.js:131:22)
    at Receiver._write (/media/theneverchosen/MyDocs/Documents/DevSpace/Projects/remote-lab-back/node_modules/ws/lib/receiver.js:78:10)
    at writeOrBuffer (node:internal/streams/writable:389:12)
    at _write (node:internal/streams/writable:330:10)
    at Receiver.Writable.write (node:internal/streams/writable:334:10)
    at Socket.socketOnData (/media/theneverchosen/MyDocs/Documents/DevSpace/Projects/remote-lab-back/node_modules/ws/lib/websocket.js:1102:35)
    at Socket.emit (node:events:390:28)
    at addChunk (node:internal/streams/readable:315:12)
    at readableAddChunk (node:internal/streams/readable:289:9) {
  code: 'WS_ERR_UNEXPECTED_RSV_2_3',
  [Symbol(status-code)]: 1002
}

The arduino can't connect and keeps firing the WStype_DISCONNECTED event.

Arduino code:

#include <SPI.h>
#include <Ethernet.h>
#include <WebSocketsClient.h>

WebSocketsClient client;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 0, 177);

void webSocketEvent(WStype_t type, uint8_t *payload, size_t length){
    switch(type) {
        case WStype_DISCONNECTED:
          Serial.println("[WSc] Disconnected!\n");
          break;

        case WStype_CONNECTED:
          Serial.print("[WSc] Connected to url: ");
          Serial.println((char *) payload);
          break;

        case WStype_TEXT:
          Serial.print("[WSc] get text: ");
          Serial.println((char *)payload);
          break;

        case WStype_BIN:
          Serial.print("[WSc] get binary length: ");
          Serial.println(length);
          break;
      }
}

void setup(){
  Serial.begin(9600);
  while(!Serial){}

  if(Ethernet.begin(mac) == 0){
    Serial.println("Failed to configure Ethernet using DHCP");
    Ethernet.begin(mac, ip);
  }

  client.begin("192.168.100.10", 3333, "/arduino");
  client.onEvent(webSocketEvent);
}

void loop(){
  client.loop();
}

[mousaashpaz]

I have the same issue. is anybody can help?

[lucasalberto01]

+1