Quote from arcachofo on December 2, 2024, 3:34 pm

I don't know much about TCP or other web technologies (Simulide is using Qt libraries) but as far as I know this TCP module is working.
For example here Simulide is sending and receiving data to Webots (robot simulator).
https://www.youtube.com/watch?v=yNwQd49Mlvw
This is a simple Car with 1 Arduino, 2 motors and ultrasonic sensors.
And there is an script working as interface: it reads data from the motors and sends to Webots, which simulates the movement and returns distance data, then the script writes these distances to the sensors in the circuit.

What can be the problem in your case I have no idea, specially without watching the code.
But some basic questions:  what kind of python server did chatGPT? are you sure it is working?

Quote from LWT98709 on December 2, 2024, 4:55 pm

I've uploaded the files. Here is the python server :

import socket

HOST = ''      # Écoute sur toutes les interfaces
PORT = 10020   # Le port sur lequel votre application envoie des données

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    print(f"Le serveur écoute sur le port {PORT}...")
    conn, addr = s.accept()
    with conn:
        print(f"Connecté par {addr}")
        while True:
            data = conn.recv(1024)
            if not data:
                print("Le client a fermé la connexion.")
                break
            message_recu = data.decode()
            print(f"Données reçues : {message_recu}")

            # Préparer la réponse
            reponse = f"Message reçu : {message_recu}\r\n"
            # Envoyer la réponse au client
            conn.sendall(reponse.encode())

The last line send data to SimulIDE thru the port it was connected.
If you comment the last line, the python programme display "message" sent by SimulIDE continuously.

The SimulIDE script is "scriptTCP.as" that come from the templates from another post :

bool m_connected;

string m_received;

void setup() // Executed when Component is created
{
    print("tcp  setup() OK"); 
}

void reset() // Executed at Simulation start
{
    print("tcp reset()");

    m_received = "";
    
    m_connected = false;

    Wb_link.connectToHost( 0, "127.0.0.1", 10020 ); // Connect to host at Socket nº 0
}

void updateStep()
{
    if( !m_connected ) return;

    Wb_link.sendMsgToHost("Message", 0 ); // Send message to host at Socket nº 0
    
    // Wb_link.closeSocket( 0 ); // Closing Socket nº 0
}

void received( string msg, int link ) // Received message from host at Socket nº link
{
    if( msg == "\r\n") return;
    
    m_received = msg;
}

void tcpConnected( int link ) // We got connected to Socket nº link
{
    print("tcp Connected to " + link );

    m_connected = true;
}

void tcpDisconnected( int link ) // We got disconnected from Socket nº link
{
    print("tcp Disconnected from " + link );
    
    m_connected = false;
}

The test is under Windows. SimulIDE (1.2.0) crash and close if data sent from python to SimulIDE.

I re-upload my test files below.

import socket

HOST = ''      # Écoute sur toutes les interfaces
PORT = 10020   # Le port sur lequel votre application envoie des données

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    print(f"Le serveur écoute sur le port {PORT}...")
    conn, addr = s.accept()
    with conn:
        print(f"Connecté par {addr}")
        while True:
            data = conn.recv(1024)
            if not data:
                print("Le client a fermé la connexion.")
                break
            message_recu = data.decode()
            print(f"Données reçues : {message_recu}")

            # Préparer la réponse
            reponse = f"Message reçu : {message_recu}\r\n"
            # Envoyer la réponse au client
            conn.sendall(reponse.encode())

bool m_connected;

string m_received;

void setup() // Executed when Component is created
{
    print("tcp  setup() OK"); 
}

void reset() // Executed at Simulation start
{
    print("tcp reset()");

    m_received = "";
    
    m_connected = false;

    Wb_link.connectToHost( 0, "127.0.0.1", 10020 ); // Connect to host at Socket nº 0
}

void updateStep()
{
    if( !m_connected ) return;

    Wb_link.sendMsgToHost("Message", 0 ); // Send message to host at Socket nº 0
    
    // Wb_link.closeSocket( 0 ); // Closing Socket nº 0
}

void received( string msg, int link ) // Received message from host at Socket nº link
{
    if( msg == "\r\n") return;
    
    m_received = msg;
}

void tcpConnected( int link ) // We got connected to Socket nº link
{
    print("tcp Connected to " + link );

    m_connected = true;
}

void tcpDisconnected( int link ) // We got disconnected from Socket nº link
{
    print("tcp Disconnected from " + link );
    
    m_connected = false;
}

Quote from LWT98709 on December 2, 2024, 5:49 pm

I've tried the simulation and python server under Linux (Lubuntu virtualbox). The problem is the same, SimulIDE crashes and closes when data is sent to it.
The question will be : In which way data must be sent to SimulIDE ?

Quote from arcachofo on December 2, 2024, 6:44 pm

In which way data must be sent to SimulIDE ?

Like in any socket, for example:  socket.send( data );
So your python code is doing ok.

Did some testing with your code and it works ok, the python side is receiving and sending response.
And the C++ side is receiving from python and sending to the script.
The script is crashing but I don't know why yet.

I have to do some debugging...

Quote from arcachofo on December 3, 2024, 1:42 pm

Found and solved the problem.
Note that repo for 1.2.0 is here: https://github.com/eeTools/SimulIDE-dev

 

Quote from LWT98709 on December 3, 2024, 5:54 pm

Good ! Wait for the next truck version to test.