Trying to build a small GSM library

Things working a bit nicer now!

var cmd="";
var issued_command="";




//Parse response v2
function parse(buffer){
  var line = buffer.toString().substring(0, buffer.length - 1);


  //Remove anything remotely blank or echoey
  if(line.length < 2 || line.indexOf(">")===0 || issued_command===line){
     return;
  }

  issued_command="";

  //SMS Received
  if(line.indexOf("+CMTI")>0){
     console.log("SMS Received");
     }
  
  //Response Received
  console.log("Parsed: " + line);
}



//Serial on data v2
Serial4.on('data',function(data){
cmd += data;
  var id = cmd.indexOf("\n");
  while (id>=0){
  var line = cmd.substr(0,id);
  cmd=cmd.substr(id+1);
  parse(line);
  id=cmd.indexOf("\n");
  }
});




function Send_SMS(text)
{
  Start_GSM();
  setTimeout(function(){send(text);},10000);
}


//Start the GSM Module
function Start_GSM() {
  Serial4.setup(9600);
  console.log("GSM Starting...");
  pinMode(C0,"output");
  digitalPulse(C0,1,2000);
}

function Stop_GSM(){
pinMode(C0,"output");
digitalPulse(C0,1,2000);
}



function send(input){
    setTimeout(function(){send_command("AT+CMGS=\"XXXXXXXXXX\"\r");},2000);
    setTimeout(function(){send_command(input);},3000);
  setTimeout(function(){send_command("\x1A\r");},3500);
  setTimeout(function(){Stop_GSM();},10000);
}



function send_command(command){
//Set the command that we are sending to issue_command for later parse out
issued_command=command;
//Send the command to serial port connected to GSM
  Serial4.write(command);
//Output what we sent to console
  console.log("Command Sent:" + command);
}



function onInit(){
Send_SMS("Heyyyy!");
}

onInit();

Results in:

 1v66 Copyright 2014 G.Williams
>echo(0);
GSM Starting...
=undefined
Command Sent:AT+CMGS="xxxxxx94740"
Command Sent:Heyyyy!
Command Sent:
Parsed: +CMGS: 96
Parsed: OK
Parsed: NORMAL POWER DOWN

Now I guess we can do lots with the Parsed responses and I have added in an example of a SMS received which the console will pick up on.

You can add in some error handling and also wait for an OK from an AT send on startup. I think I'll work on the latter next so that I can then kick off the actual SMS sending via callbacks once I'm sure the module is running.