Telit-Modem

Telit Modem interface for serial ports (with focus on HE910-D and similiar series) NodeJS

Please note that this is still a beta version

This module is also a showcase for how you can customize the generic ATCommander.Modem for your specific devices.

Examples

SMS

var TelitModem = require('telit-modem');

var CREG = TelitModem.NetworkRegistrationStates;

var modem = new TelitModem.TelitModem();

modem.open('COM4').catch((err) => {
    console.error("Failed to open serial port", err);
}).then(() => {
    console.log("Opened serial port");

    process.on('SIGINT', function () {
        modem.unsubscribeFromNetworkRegistrationState();
        modem.closeGracefully(function(){
            process.exit(0);
        });
    });


    modem.startProcessing();

    modem.on('discarding', function(buf){
       console.log("discarding", buf.toString());
    });

    modem.subscribeToNetworkRegistrationState((state) => {
        switch(state){
            case CREG.NotRegisteredNotSearching:
                console.log("Network registration state: Not registered, not searching");
                break;

            case CREG.RegisteredHome:
                console.log('Network registration state: Registered (home network)');
                break;

            case CREG.NotRegisteredButSearching:
                console.log('Network registration state: Not registered, but searching');
                break;

            case CREG.RegistrationDenied:
                console.log('Network registration state: Registration denied');
                break;

            case CREG.Unknown:
                console.log('Network registration state: unknown');
                break;

            case CREG.RegisteredRoaming:
                console.log('Network registration state: Registered (roaming)');
                break;

        }
    });


    modem.enableSMS((pdu, destinationNumber, pduLen) => {
        console.log("Received SMS", destinationNumber, pduLen);

        console.log("Text", pdu.text.toString());
    });

});

Networking

Sockets

var TelitModem = require('telit-modem');

var modem = new TelitModem.TelitModem();

modem.open('COM4').catch((err) => {
    console.error("Failed to open serial port", err);
}).then(() => {
    console.log("Opened serial port");

    process.on('SIGINT', function () {
        modem.disablePDP();
        modem.closeGracefully(function(){
            process.exit(0);
        });
    });


    modem.startProcessing();

    modem.on('discarding', function(buf){
       console.log("discarding", buf.toString());
    });


    modem.disablePDP().then(function () {
        console.log("deinitialized PDP");

        modem.setAPN("\"myAPN\"");

        setTimeout(function () { // wait 2 seconds before enabling PDP (again)
            modem.enablePDP().then((ip) => {
                console.log('connected with IP', ip);

                var sock = modem.getSocket();
                sock.connect({
                    host: "whois.internic.ch",
                    port: 43,
                    transportProtocol: TelitModem.Protocols.TCP
                }, function () {
                    console.log("Connected..");

                    sock.on('data', (data) => {
                        console.log("Response", data.toString());
                        modem.close();
                    });

                    console.log("Querying for the registrar of godzilla.com");
                    sock.write("godzilla.com\r\n");
                });
            });
        }, 2000);
    });
});

HTTP requests

var TelitModem = require('telit-modem').TelitModem;

var modem = new TelitModem();

modem.open('COM4').catch((err) => {
    console.error("Failed to open serial port", err);
}).then(() => {

    process.on('SIGINT',function(){
        modem.disablePDP();
        modem.closeGracefully(function(){
            process.exit(0);
        });
    });


    modem.startProcessing();

    modem.on('discarding', function(buf){
        console.log("discarding", buf.toString());
    });

    modem.disablePDP().then(function() {
        console.log("deinitialized PDP");

        modem.setAPN("\"myAPN\"");

        setTimeout(function(){ // wait 2 seconds before enabling PDP (again)
            modem.enablePDP().then((ip) => {
                console.log('connected with IP', ip);

            var url = 'http://google.ch/robots.txt';
            console.log("GET "+url);
            modem.http().get(url, (res) => {
                console.log('Response:');

                res.on('data', (ch) => console.log('ch', ch.toString("ascii")));

                res.socket.close();

                modem.close();
                });
            });
        }, 2000);
    });

});