how reconnect ?

[profelec]

If I loose connection, is it possible to reconnect without the node script being stopped and restarted? I tried this without success:

// create a modbus client
var ErreurModbus = 0;
var client = modbus.createTCPClient(CONF_portAutomate, CONF_ipAutomate, function (err) {
    if (err) {
        ErreurModbus = 1;
        io.sockets.emit('displayErreurModbus', ErreurModbus); // tous
    }
});

/*Un client se connecte*/
io.sockets.on('connection', function (socket) {
    /* Clique sur le bouton Reset Server*/
    socket.on('setResetServer',function(){
        ErreurModbus = 0;
        client.reconnect();
        io.sockets.emit('displayErreurModbus', ErreurModbus); // tous
    })
});

[stefanpoeter]

Any error messages?

[profelec]

I have no error messages. I tested this with a virtual server, and the code works one time out of three. And I tested this with a Zelio automaton, and it never works.

[stefanpoeter]

I checked the code, the reconnect function just calls the connect method on the socket. Make sure the connection is closed when you reconnect the client. Listen to the error and close events on the client, what did they have to say? This way we get a bit more information on that matter.

client.reconnect = function () {
    socket.connect(port, host);
};

[stefanpoeter]

You might want to check the #2 v1.0.0 branch. The README describes how to handle reconnects there. It even has two examples for doing so.

[profelec]

Thanks! Your update is great, it works! :+1:

But, there is a error in the readme.md :

client.readHoldingRegister(0, 10).then(function (resp) {

        // resp will look like { fc: 3, byteCount: 20, register: [ values 0 - 10 ] }
        console.log(resp); 

    }).fail(console.log);

it misses an "S" to readHoldingRegister.