Migrating to the STM32F405ZGT6

Okay, so I kinda followed what you have there, expounding on what I had started previously. Now I've written a small function to grab the incoming data and pop the information to a buffer that I can check at any time.

var mdmBuffer = "";       //Main storage buffer
var mdmURCBuffer = "";    //URC Buffer
var mdmParsedBuffer = ""; //AT Response buffer

Serial6.on('data', function (data) {
  //This event grabs incoming data and concatenates it into a buffer
  //The buffer is scanned for identifiable modem AT responses and handles URCs.
  //This assumes a regular cleanup of the main buffer in your flow.
  var idx1 = -1;
  var idx2 = -1;

  mdmBuffer += data;
  //Scan for common AT responses, need to search for these as 
  //sometimes you can get multiple CRLF and throw off other checks
  if (mdmBuffer.indexOf("#")>=0 ||
      mdmBuffer.indexOf("+")>=0 ||
      mdmBuffer.indexOf("$")>=0 ||
      mdmBuffer.indexOf(">")>=0 ||
      mdmBuffer.indexOf("ERROR")>=0 ||
      mdmBuffer.indexOf("OK")>=0) {
      //Found one of these

    if (mdmBuffer === "\r\nOK\r\n") {
      //Straight up OK response, no other return
      mdmParsedBuffer = "OK";
    }
    if (mdmBuffer === "\r\nERROR\r\n") {
      //Straight up ERROR response, no other return
      mdmParsedBuffer = "ERROR";
    }

    if (mdmBuffer.indexOf("#")>=0 ||
        mdmBuffer.indexOf("+")>=0 ||
        mdmBuffer.indexOf("$")>=0) {
      //Found one of these
      //Could be a URC or an AT response

      //Put these to a buffer we can call upon at runtime or service through 
      //a set interval. If we print these immediately they may not be read/full.
      if (mdmBuffer.indexOf("OK")>=0) {
        //If there's an OK in here, it's not a URC
        mdmParsedBuffer = mdmParseResponse(mdmBuffer);

      }
      else mdmURCBuffer = mdmParseResponse(mdmBuffer);

    }
  }
});

function mdmParseResponse(inSTR) {
  //This function parses out the responses to readable format
  //It recognizes non-AT style responses by the \r\n and just returns them.

  if (inSTR !== -1 && inSTR.length > 0) {
    rtnSTR= inSTR;

    if (inSTR.indexOf('\r\n',0) !== -1) {
      splitList = inSTR.split('\r\n');
      rtnSTR = splitList[1];
    }

  }
return rtnSTR;
}

and some little helper functions

function mdmClearBuffer() {
  //Clears the main buffer
  mdmBuffer = "";
}

function mdmPrintBuffers() {
  //Prints out the main buffers to console
  console.log("mdmBuffer = " + mdmBuffer);
  console.log("mdmURCBuffer = " + mdmURCBuffer);
  console.log("mdmParsedBuffer = " + mdmParsedBuffer);
}

function mdmSendAT(data) {
  Serial6.println(data);
}

Output

mdmSendAT('AT+CREG?')
=undefined
mdmPrintBuffers()
mdmBuffer =
+CREG: 0,2
OK
mdmURCBuffer = +CRE
mdmParsedBuffer = +CREG: 0,2
=undefined

So overall it's similar to what I had before, just done more automatic and doesn't require calling a receive/parsing function separately, which is nice.

Now the question is how do I actually take this further and if it's even possible, as in, is it possible to automate something that I want done. I'm trying to wrap my head around what normally gets done for this and it's getting a little muddy.

An example would be something simple like reading an I/O and sending an SMS upon a desired state. I feel like I'm going to be creating a bunch of little functions, and a larger function that gets an interval set and passed the desired small function to run, so that it can run the network checking and whatnot when required.

Hmm, I feel like this should be moved to the projects/JS area so it's not muddying up the General area.