Basic WebSocket Server for Arduino Uno with W5500 Ethernet Shield - websocket

Question

I am fairly new to Arduino and I am trying to construct a generic WebSocket server which send simple ASCII values to a WebSocket client running via a python program connected to the Arduino via an Ethernet cable. I don't want to construct a full WebServer, rather I just want to use WebSocket, in order to avoid using HTTP.
I am unsure of what library I should use for a W5500 shield with an Arduino Uno. Nor can I find any comprehensive and simple examples of how a basic WebSocket Server is constructed in Arduino. Can any one provide some recommendations for appropriate libraries or with good pieces of example code?
Thanks in advance
Edit: Here is a basic attempt at a generic WebSocket server I have taken from the WebSockets_Generic.h library, just to outline what I would like to make:
#include <Ethernet2.h>
#include <WebSockets_Generic.h>
WebSocketsServer webSocket = WebSocketsServer(81);
// Enter a MAC address and IP address for your controller below.
byte mac[] ={0xA8, 0x61, 0x0A, 0xAE, 0x69, 0x13};
// Select the IP address according to your local network
IPAddress ip(198, 162, 1, 177);
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:
{
Serial.println( "[" + String(num) + "] 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));
// send message to client
webSocket.sendTXT(num, "message here");
// send data to all connected clients
webSocket.broadcastTXT("message here");
break;
case WStype_BIN:
Serial.println( "[" + String(num) + "] get binary length: " + String(length));
//hexdump(payload, length);
// send message to client
// webSocket.sendBIN(num, payload, length);
break;
default:
break;
}
}
void setup()
{
// Serial.begin(921600);
Serial.begin(115200);
while (!Serial);
// start the ethernet connection and the server:
// Use DHCP dynamic IP and random mac
uint16_t index = millis();
// Use Static IP
//Ethernet.begin(mac[index], clientIP);
Ethernet.begin(mac, ip);
// server address, port and URL
Serial.print("WebSockets Server # IP address: ");
Serial.println(Ethernet.localIP());
webSocket.begin();
webSocket.onEvent(webSocketEvent);
}
void loop()
{
webSocket.loop();
}
This does not compile and instead produces an error:
In file included from /home/user/Data/Code-pieces/Arduino-Flowmeter/test/test.ino:2:0:
/home/user/Arduino/libraries/WebSockets_Generic/src/:69:4: error: #error Version 2.x.x currently does not support Arduino with AVR since there is no support for std namespace of c++.
#error Version 2.x.x currently does not support Arduino with AVR since there is no support for std namespace of c++.
^~~~~
/home/user/Arduino/libraries/WebSockets_Generic/src/WebSockets_Generic.h:70:4: error: #error Use Version 1.x.x. (ATmega branch)
#error Use Version 1.x.x. (ATmega branch)
^~~~~
Multiple libraries were found for "Ethernet.h"
Used: /home/user/Data/Code-pieces/arduino-1.8.14/libraries/Ethernet
Not used: /home/user/Arduino/libraries/UIPEthernet
exit status 1
Error compiling for board Arduino Uno.
WebSockets_Generic.h
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.