Node.js Socket.io client on Flask socket.IO server - node.js

Question

I'm trying to connect a Node.js Socket.IO client to a Python/Flask Socket.IO server.
On the server (Raspberry Pi) runs this project: Pi-GPIO-Server. This project already has a built-in website which is a socket.io client to access the pins of the Raspberry Pi.
The whole project works well.
Now I'd like to access the socket.io connection from a Node.JS client.
On the server side, I've updated the IP and port of the server to:
if __name__ == '__main__':
socketio.run(app, host="192.168.0.8", port=5000)
On the client side my implementation is (as stated in the documentation of the project)
var io = require('socket.io-client');
var socket = io.connect('http://192.168.0.8:5000', {path: '/', transports: ['websocket']});
socket.on( 'connect', (socket) => {
console.log('Connected: ');
console.log(socket);
});
socket.on( 'pins:list', (list) => {
console.log('List of Pins: ');
console.log(list);
});
Any ideas, why I cannot get a connection?
Is there a limitation of clients in the Flask server? Any special command to send?
Is there a possibility to debug the connection?

Answer 1

#Christoph Please use the below code you should be able to connect...I have Flash server running and Nodejs as a client, It is working fine for me!!!
In my case i am running both server and client in same machine so i used localhost in place of IP address
const socket = require('socket.io-client')('http://192.168.0.8:5000', {
reconnection: true,
reconnectionDelay: 10000
});
socket.on('connect', (data) => {
console.log('Connected to Socket');
});
socket.on('event_name', (data) => {
console.log("-----------------received event data from python flask srver");
});
//either 'io server disconnect' or 'io client disconnect'
socket.on('disconnect', (reason) => {
console.log("client disconnected");
if (reason === 'io server disconnect') {
// the disconnection was initiated by the server, you need to reconnect manually
console.log("server disconnected the client, trying to reconnect");
socket.connect();
}else{
console.log("trying to reconnect agan with server");
}
// else the socket will automatically try to reconnect
});
socket.on('error', (error) => {
console.log(error);
});