Serial Logging class written for Java/Processing, integrates cleanly on UNIX/MacOS since it relies on unix style system commands

SerialLogger.java

class SerialLogger {
    public String portname;
    public String filename;
    public Process p;

    SerialLogger(String portname, String filename) {
        this.portname = portname;
        this.filename = sketchPath() + "/data/" + filename + ".csv";
    }

    void beginRecording() {
        ProcessBuilder builder = new ProcessBuilder("cat", portname);
        builder.redirectOutput(new File(this.filename));
        try {
            p = builder.start(); // may throw IOException
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }

    void endRecording() {
        p.destroyForcibly();
    }

    void beginStreaming(){
        exec("sh", "-c", "echo a > " + portname);
    }

    void endStreaming(){
        exec("sh", "-c", "echo a > " + portname);
    }


    void begin(){
        beginStreaming();
        beginRecording();
    }

    void end(){
        endStreaming();
        endRecording();
    }
}