SocketIO SID

[SSC-Sheffield]

When using the demo examples of creating a flask app server with socketio I cannot seen to get an SID assigned.
app = Flask(__name__)
socketio = SocketIO(app, async_mode="gevent")

@socketio.event def connect(sid): print(sid, 'connected')

returns None Connected in the server terminal window.

The JS client has
const socket = io('http://localhost:5000');
socket.on('connect', () => { console.log('connected'); })

which gets passed successfully to the console.

I'm trying to read temperature readings from an ADC connected to a raspberry pi. There is some feedback from the client - ie what type of temperature sensor we want to read. The server then needs to find the correct data and return to the client.

It's worked intermittently.
Any help would be much appreciated!

[miguelgrinberg]

The connect handler does not take the sid as an argument. You should use request.sid inside the handler instead.