RP2040 WebSocket immediate disconnection

Bug

Starting from "RP2040_ServerAllFunctionsDemo.ino" from File > Examples > WebSockets2_Generic > Generic > WiFiNINA > RP2040 . After some fixes (explained below) I can connect but I cannot maintain the communication open.

Steps to Reproduce

Used generic RP2040_ServerAllFunctionsDemo.ino from File > Examples > WebSockets2_Generic > Generic > WiFiNINA > RP2040 .
Set correct ssid and password in defines.h
Set the correct wsServer url in line 100
Went to the ip address:80 and saw the RGB sliders

Expected behavior

Socket connection opened and communication happening (not interested in RGB to really work but the communication to being established).

Actual behavior

PROBLEM: Javascript error: "Uncaught ReferenceError: wsServer is not defined" .

SOLUTION: Solved by replacing in line 106 this: var connection = new WebSocket(wsServer, ['arduino']); with: var connection = new WebSocket('ws://'+window.location.hostname+':8080/', ['arduino']); Compiled and uploaded new code.

RESULT: problem 1 solved, but I receive "WebSocket Error"

PROBLEM: WebSocket Error

SOLUTION: Solved by developing my own script available below:

    var wsClientOutput;

    function init() {
        testWebSocket();
    }

    function testWebSocket() {
        websocket = new WebSocket("ws://192.168.2.123:8080/"); //change with yours
        websocket.onopen = function (evt) {
            onOpen(evt)
        };
        websocket.onclose = function (evt) {
            onClose(evt)
        };
        websocket.onmessage = function (evt) {
            onMessage(evt)
        };
        websocket.onerror = function (evt) {
            onError(evt)
        };
    }

    function onOpen(evt) {
       console.log("OPEN")
    }

    function onClose(evt) {
        console.log("DISCONNECTED");
    }

    function onMessage(evt) {
        console.log('RESPONSE: ' + evt.data);
    }

    function onError(evt) {
        console.log('ERROR:' + evt.data);
    }

    function doSend(message) {
        console.log("SENT: " + message);
        websocket.send(message);
    }

    window.addEventListener("load", init, false);

RESULT: I can connect but I quickly disconnect.

PROBLEM: Immediate disconnection after connection

SOLUTION: I removed line 140 and line 143 from "RP2040_ServerAllFunctionsDemo.ino " Compiled and uploaded new code.

RESULT: same error. Immediate disconnection after connection.

Information

Please ensure to specify the following, or your post will be ignored and deleted:

Arduino IDE version: 2.0.3
RP2040 Core Version: Arduino-mbed OS Nano 3.5.4
RP2040 Board type: NANO_RP2040_CONNECT
Contextual information: maintain connection without automatic disconnection and stream some sensors values.
Operating system (Windows, Ubuntu, etc.): Windows 10
Network: Wi-Fi

Hi @MirkoGelsomini

PROBLEM: Immediate disconnection after connection

That's the way the example is written and you have to read and understand to use

https://github.com/khoih-prog/WebSockets2_Generic/blob/aa30bc03f604efe07d6c08214391a5ad98676776/examples/Generic/RP2040W/RP2040W_ServerAllFunctionsDemo/RP2040W_ServerAllFunctionsDemo.ino#L153-L157

You must modify the example depending on your different use-case.

You have to write the correct and matching WS Client to reconnect in loop to use with this example.

For example, the WS server is @ 192.168.2.118:8080

Python WS Client code `WSClient.py`

# Run by $ python3.8 WSClient.py
# From websocket-client package. Install by $ pip3 install websocket-client
import websocket
import time

ws = websocket.WebSocket()

while True:
    ws.connect("ws://192.168.2.118:8080")
    ws.send("Hello, Server")
    result = ws.recv()
    print(result)
    time.sleep(10)

WS Client Terminal

kh@kh-Inspiron-3593:~/Downloads/Nodejs/WSClient_Python$ python3.8 WSClient.py
Echo: 
Echo: 
Echo: 
Echo: 
Echo: 
Echo: 
...

Debug Terminal for WS Server

Starting RP2040W_ServerAllFunctionsDemo on RASPBERRY_PI_PICO_W
WebSockets2_Generic v1.13.2
Connecting to SSID: HueNet
SSID: HueNet
Local IP Address: 192.168.2.118
WebSockets Server Running and Ready on RASPBERRY_PI_PICO_W
IP address: 192.168.2.118, Port: 8080
wsServer: ws://192.168.2.95:8080/
[WS] WebsocketsServer::recvHandshakeRequest: key = Upgrade
[WS] WebsocketsServer::recvHandshakeRequest: value = websocket
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = upgrade
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = websocket
[WS] WebsocketsServer::recvHandshakeRequest: key = Host
[WS] WebsocketsServer::recvHandshakeRequest: value = 192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = host
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = 192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: key = Origin
[WS] WebsocketsServer::recvHandshakeRequest: value = http://192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = origin
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = http://192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: key = Sec-WebSocket-Key
[WS] WebsocketsServer::recvHandshakeRequest: value = kPyLjt0Z8UfeSFy0purr3Q==
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = sec-websocket-key
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = kPyLjt0Z8UfeSFy0purr3Q==
[WS] WebsocketsServer::recvHandshakeRequest: key = Sec-WebSocket-Version
[WS] WebsocketsServer::recvHandshakeRequest: value = 13
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = sec-websocket-version
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = 13
[WS] WebsocketsServer::recvHandshakeRequest: key = Connection
[WS] WebsocketsServer::recvHandshakeRequest: value = Upgrade
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = connection
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = upgrade
Got Message: 
[WS] WebsocketsServer::recvHandshakeRequest: key = Upgrade
[WS] WebsocketsServer::recvHandshakeRequest: value = websocket
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = upgrade
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = websocket
[WS] WebsocketsServer::recvHandshakeRequest: key = Host
[WS] WebsocketsServer::recvHandshakeRequest: value = 192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = host
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = 192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: key = Origin
[WS] WebsocketsServer::recvHandshakeRequest: value = http://192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = origin
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = http://192.168.2.118:8080
[WS] WebsocketsServer::recvHandshakeRequest: key = Sec-WebSocket-Key
[WS] WebsocketsServer::recvHandshakeRequest: value = nrATeKoxvo2o9DEoFdiTcg==
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = sec-websocket-key
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = nrATeKoxvo2o9DEoFdiTcg==
[WS] WebsocketsServer::recvHandshakeRequest: key = Sec-WebSocket-Version
[WS] WebsocketsServer::recvHandshakeRequest: value = 13
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = sec-websocket-version
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = 13
[WS] WebsocketsServer::recvHandshakeRequest: key = Connection
[WS] WebsocketsServer::recvHandshakeRequest: value = Upgrade
[WS] WebsocketsServer::recvHandshakeRequest: lowkey = connection
[WS] WebsocketsServer::recvHandshakeRequest: lowvalue = upgrade
Got Message: 
...

khoih-prog / WebSockets2_Generic