Finds arduinos attached via USB and prints out their ID and serial port string

ArduinoConnector.pde

import java.lang.ProcessBuilder;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.io.BufferedReader;
import java.io.FileReader;

static class ArduinoConnector{
  
  public static final String DEFAULT_ECS_MAP_FILENAME = "ECSMap.txt";
  public static final String SERIAL_NUMBER = "Serial Number: ";
  public static final String LOCATION = "Location ID: ";

  public static String getSerialName(String a_sECSName, String a_sMapFilename) throws FileNotFoundException, IOException {
    String sID = null;
      BufferedReader reader = new BufferedReader(new FileReader(a_sMapFilename));
      for(String line = reader.readLine(); line != null; line = reader.readLine()){
        String[] pieces = split(line,';');
        if (pieces.length == 2 && pieces[0].equals(a_sECSName)){
          sID = pieces[1];
          break;
        }
      }
    //if it isn't in the map, return false (failed)
    if (sID == null){
      return null;
    }
    
    return GetSerialName(sID);
  }
  
  //thanks to https://github.com/davidvondle/Upload-And-Retrieve-Source/blob/master/GistUploader/src/template/tool/GistUploader.java
  private static String GetSerialName(String a_sSerialNumber){
    //assuming OSX
    String getUsbArgs[] = new String[2];
    getUsbArgs[0]="system_profiler";
    getUsbArgs[1]="SPUSBDataType";
    //this probably needs to be smarter and allow for zeros within the number, such as '303'
    //also, it could be that we really only need to strip the first 4 or 5 digits from the number
    //and then strip leading zeros off of that, instead of running this open-ended regex
    String regex = "^0x0*([1-9a-f]*)0*";
    Pattern p = Pattern.compile(regex);
    Matcher m;
    String serialIn;
    try {
      Process process = new ProcessBuilder(getUsbArgs).start();
      InputStream is = process.getInputStream();
      InputStreamReader isr = new InputStreamReader(is);
      BufferedReader br = new BufferedReader(isr);
      String line;
      String currSerial = null;
      String currLocation = null;
  
      boolean foundArduino=false;
      int serialNumPosition, locationPosition; 
      while ( (line = br.readLine ()) != null) {
        serialNumPosition = line.indexOf(SERIAL_NUMBER);
        if (serialNumPosition >= 0) {
          currSerial = line.substring(serialNumPosition + SERIAL_NUMBER.length());
          if (!currSerial.equals(a_sSerialNumber)){
            currSerial = null;
          }
        } else if (currSerial != null && (line.indexOf("Arduino") >= 0  || line.indexOf("FT232R") >= 0 || line.indexOf("Vendor ID: 0x20a0") >= 0)) { //Vendor ID: 0x20a0 is freetronics
          foundArduino = true;
        } else if (foundArduino && currSerial != null) {
          locationPosition = line.indexOf(LOCATION);
          if (locationPosition >= 0){
            currLocation = line.substring(locationPosition + LOCATION.length());
            m = p.matcher(currLocation);
            if (m.groupCount() > 0 && m.find()){
              return "/dev/tty.usbmodem"+m.group(1)+"1";
            }
            currSerial = null;
            currLocation = null;
            foundArduino = false;
          }
        }
      }
    }
    catch(IOException e) {
      System.out.println(e.getMessage());
    }
    return null;
  }
}

ArduinoSniffer.pde

import processing.serial.*;

import java.lang.ProcessBuilder;
import java.util.ArrayList;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

String SERIAL_NUMBER = "Serial Number: ";
String LOCATION = "Location ID: ";
Hashtable mapping = new Hashtable();

public void setup() {
  size(200, 200);
  noLoop();
  importECSMap();
  //Hashtable of Arduino IDs -> serial interface names
  Hashtable serialNums = findSerialNumbers();
  String currKey, currValue;
  println("list of Arduino IDs that are not assigned ECS names:");
  int i = 1;
  for(Enumeration IDs = serialNums.keys(); IDs.hasMoreElements();){
    currKey = (String)IDs.nextElement();
    if (!mapping.containsKey(currKey)){
      currValue = (String)serialNums.get(currKey);
      println(i++ + ")\tID: " + currKey);
      //println("\tserial port: " + currValue);
    } else {
      String ecsName = (String)mapping.get(currKey);
      try {
        println("\tserial port from ECS name: " + ArduinoConnector.getSerialName(ecsName,dataPath("ECSMap.txt")));
      } catch (Exception e){
        println(e.getMessage());
      }
    }
  } 
  println();
  //println((new Serial(this)).list());
  println("done");
}

//Builds a Hashmap from a semi-colon separated file
//This is intended to build a Hashmap of ArduinoIDs -> ECS names
public void importECSMap(){
  try{
    BufferedReader reader = createReader("ECSMap.txt");
    for(String line = reader.readLine(); line != null; line = reader.readLine()){
      String[] pieces = split(line,';');
      if (pieces.length == 2){
        //map ids -> names
        mapping.put(pieces[0],pieces[1]);
      }
    }
  }catch(Exception e){
    println(e.getMessage());
  }
}



//thanks to https://github.com/davidvondle/Upload-And-Retrieve-Source/blob/master/GistUploader/src/template/tool/GistUploader.java
//Returns a Hashtable of Arduino IDs -> serial interface names
public Hashtable findSerialNumbers() {
  //assuming OSX
  String getUsbArgs[] = new String[2];
  getUsbArgs[0]="system_profiler";
  getUsbArgs[1]="SPUSBDataType";
  Hashtable serialNums = new Hashtable();
  //this probably needs to be smarter and allow for zeros within the number, such as '303'
  //also, it could be that we really only need to strip the first 4 or 5 digits from the number
  //and then strip leading zeros off of that, instead of running this open-ended regex
  String regex = "^0x0*([1-9a-f]*)0*";
  Pattern p = Pattern.compile(regex);
  Matcher m;
  String serialIn;
  try {
    Process process = new ProcessBuilder(getUsbArgs).start();
    InputStream is = process.getInputStream();
    InputStreamReader isr = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(isr);
    String line;
    String currSerial = null;
    String currLocation = null;

    boolean foundArduino=false;
    int serialNumPosition, locationPosition; 
    while ( (line = br.readLine ()) != null) {
      println(line);
      serialNumPosition = line.indexOf(SERIAL_NUMBER);
      if (serialNumPosition >= 0) {
        currSerial = line.substring(serialNumPosition + SERIAL_NUMBER.length());
      } else if (line.indexOf("Arduino") >= 0  || line.indexOf("FT232R") >= 0 || line.indexOf("Vendor ID: 0x20a0") >= 0) { //Vendor ID: 0x20a0 is freetronics
        foundArduino = true;
      } else if (foundArduino && currSerial != null) {
        locationPosition = line.indexOf(LOCATION);
        if (locationPosition >= 0){
          currLocation = line.substring(locationPosition + LOCATION.length());
          m = p.matcher(currLocation);
          if (m.groupCount() > 0 && m.find()){
            serialIn = "/dev/tty.usbmodem"+m.group(1)+"1";
            serialNums.put(currSerial, serialIn);
          } else {
            println("ERROR: ");
            println(currSerial + " : " + currLocation);
          }
          currSerial = null;
          currLocation = null;
          foundArduino = false;
        }
      }
    }
  }
  catch(IOException e) {
    println(e.getMessage());
    System.out.println(e.getMessage());
  }
  return serialNums;
}

ECSMap.txt

74132343430351C0B1F1;ForestOutputKingKong
6413138323135170F0E1;HouseOutputLamp

Test.pde

import processing.serial.*;

Serial s;

void setup(){
  String serialName = null;
  try {
    serialName = ArduinoConnector.getSerialName("MrMonkey",dataPath("ECSMap.txt"));
  }catch(Exception e){}
  if (serialName == null){
    print("OH NO!");
  } else {
    s = new Serial(this, serialName, 9600);
  }
}

You will want to make the following directory & file structure. ECSMap.txt is provided as an example of the format expected (semi-colon seperated, one entry per line)

ArduinoSniffer/

• ArduinoSniffer.pde
• data/
  • ECSMap.txt