NanoArt: Experiment of SMSLib on GPRS Modem in Ubuntu

I spent a lot of time on this GPRS 609 MODEM. Somehow this device I purchased on Ebay is faulty, or it isn't powerful enough in my area. Anyway it doesn't work very well. Basically, it can connect with "cu -l /dev/ttyUSB0", but sometimes it had no echo even I tried "AT+ATE1". The command AT+CMGS almost failed with error 33825, altough I did manage to send SMS twice. However, SMSLib SendMessage never succeeded. Interestingly enough, all other commands(listed below) were OK on the condition that the echo was fine.

Finally, I gave up the lame duck(I am afraid say so), as my friend offered me his Motorola V3 mobile phone which can be taken as a GPRS modem. Life became much easier with this mobile phone. Almost everything was straightforward.

With Ubuntu 10.10 32bit guest OS in Vmware Workstation,

dmesg shows this device is recognized as ttyACM0, no additional driver needed.


[  233.820553] usb 2-1: new full speed USB device using uhci_hcd and address 3
[  234.057913] usb 2-1: configuration #1 chosen from 2 choices
[  234.284872] cdc_acm 2-1:1.0: ttyACM0: USB ACM device
[  234.297306] usbcore: registered new interface driver cdc_acm
[  234.297901] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters

No hassle at all when using AT commands to send SMS. However, the tricks suggested by SMSLib Troubleshooting are applied during SMSLib tests. In details, the parameter -Dsmslib.serial.polling is used for no response exception. A symbolic link (sudo ln -s /dev/ttyACM0 /dev/ttyS20) is created for NoSuchPortException, but I haven't tried the alternative - gnu.io.rxtx.SerialPorts.


    /*
     * Register ports specified in the file "gnu.io.rxtx.properties"
     * Key system properties:
     *                   gnu.io.rxtx.SerialPorts
     *                  gnu.io.rxtx.ParallelPorts
     *
     * The file gnu.io.rxtx.properties must reside in the java extension dir
     *
     * Example: /usr/local/java/jre/lib/ext/gnu.io.rxtx.properties
     *
     * The file contains the following key properties:
     *
     *  gnu.io.rxtx.SerialPorts=/dev/ttyS0:/dev/ttyS1:
     *  gnu.io.rxtx.ParallelPorts=/dev/lp0:
     *
     */

In addition, I chose the RXTX library distribution from CloudHopper's web site. Also I installed Sun Java, as I know the folder structure of Sun Java better than built-in Open JDK on Ubuntu. The command to run this jar is,

 /opt/java/bin/java -Dsmslib.serial.polling -Djava.library.path=/opt/java/bin -jar smslearn.jar

The modified java source code of SendMessage example.



// SendMessage.java - Sample application.
//
// This application shows you the basic procedure for sending messages.
// You will find how to send synchronous and asynchronous messages.
//
// For asynchronous dispatch, the example application sets a callback
// notification, to see what's happened with messages.

package com.deepnet.smslearn;

import org.smslib.AGateway;
import org.smslib.IOutboundMessageNotification;
import org.smslib.Library;
import org.smslib.OutboundMessage;
import org.smslib.Service;
import org.smslib.modem.SerialModemGateway;

public class SendMessage
{
 public void doIt(String device, String speed, String phone, String message) throws Exception
 {
  OutboundNotification outboundNotification = new OutboundNotification();
  System.out.println("Example: Send message from a serial gsm modem.");
  System.out.println(Library.getLibraryDescription());
  System.out.println("Version: " + Library.getLibraryVersion());
  SerialModemGateway gateway = new SerialModemGateway("modem.ttyS20", device, Integer.parseInt(speed), "NoSuchPortException", "V3");
  gateway.setInbound(true);
  gateway.setOutbound(true);
//  gateway.setSimPin("0000");
  // Explicit SMSC address set is required for some modems.
  // Below is for VODAFONE GREECE - be sure to set your own!
//  gateway.setSmscNumber("+306942190000");
  Service.getInstance().setOutboundMessageNotification(outboundNotification);
  Service.getInstance().addGateway(gateway);
  Service.getInstance().startService();
  System.out.println();
  System.out.println("Modem Information:");
  System.out.println("  Manufacturer: " + gateway.getManufacturer());
  System.out.println("  Model: " + gateway.getModel());
  System.out.println("  Serial No: " + gateway.getSerialNo());
  System.out.println("  SIM IMSI: " + gateway.getImsi());
  System.out.println("  Signal Level: " + gateway.getSignalLevel() + " dBm");
  System.out.println("  Battery Level: " + gateway.getBatteryLevel() + "%");
  System.out.println();
  // Send a message synchronously.
  OutboundMessage msg = new OutboundMessage(phone, message);
  Service.getInstance().sendMessage(msg);
  System.out.println(msg);
  // Or, send out a WAP SI message.
  //OutboundWapSIMessage wapMsg = new OutboundWapSIMessage("+306974000000",  new URL("http://www.smslib.org/"), "Visit SMSLib now!");
  //Service.getInstance().sendMessage(wapMsg);
  //System.out.println(wapMsg);
  // You can also queue some asynchronous messages to see how the callbacks
  // are called...
  //msg = new OutboundMessage("+309999999999", "Wrong number!");
  //srv.queueMessage(msg, gateway.getGatewayId());
  //msg = new OutboundMessage("+308888888888", "Wrong number!");
  //srv.queueMessage(msg, gateway.getGatewayId());
//  System.out.println("Now Sleeping - Hit  to terminate.");
//  System.in.read();
  Service.getInstance().stopService();
 }

 public class OutboundNotification implements IOutboundMessageNotification
 {
  public void process(AGateway gateway, OutboundMessage msg)
  {
   System.out.println("Outbound handler called from Gateway: " + gateway.getGatewayId());
   System.out.println(msg);
  }
 }

 public static void main(String args[])
 {
  if(args.length < 4)
  {
   System.out.println("Usage:smslearn device speed phone message");
   return;
  }
   
  SendMessage app = new SendMessage();
  try
  {
   app.doIt(args[0],args[1],args[2],args[3]);
  }
  catch (Exception e)
  {
   e.printStackTrace();
  }
 }
}

Basic AT commands

you can try minicom instead.


$ cu -l /dev/ttyACM0
Connected.

//Phone activity status +CPAS.  0 Ready, 1 Unavailable,2 Unknown,3 Ringing,4 Call in progress,5 Asleep
at+cpas
+CPAS: 0

//Request manufacturer identification +CGMI
at+cgmi
+CGMI: "Motorola CE, Copyright 2004"

//Request model identification +CGMM
at+cgmm
+CGMM: "GSM900","GSM1800","GSM1900","GSM850","MODEL=V3"

//Request revision identification +CGMR
at+cgmr
+CGMR: "R374_G_0E.42.10R_A"

//Request product serial number identification +CGSN
at+cgsn
+CGSN: IMEI354759009930994

//AT+ATE1 : enable echo;

//Service Centre Address +CSCA
at+csca?
+CSCA: "+447973100973",145

//Report Mobile Equipment error +CMEE
AT+CMEE=1  //Report Mobile Equipment extend error. 0 = Disable, 1 = result code and use numeric values, 2 = result code and use verbose value

//Message Format +CMGF
AT+CMGF?  // Query current format
AT+CMGF=1 // 0 = PDU mode (default), 1 = text mode

//Enter PIN +CPIN
at+cpin?
+CPIN: READY

//Send Message +CMGS
AT+CMGS="+31638740161" 
Hello World ! 
+CMGS: 62
//Replace the above phone number with your own cell phone number. The modem will respond with: >
//You can now type the message text and send the message using the - key combination:
//After some seconds the modem will respond with the message ID of the message, indicating that the message was sent correctly:
//The message will arrive on the mobile phone shortly.