Swift to Arduino using serial

Question

For my school project, i want to create a MacOS application that communicates with my Arduino using a serial connection. I tried 2 different library (SwiftSerial and ORSSerialPort). Both without succes. Probably because I'm a beginner with Swift.

I decided to continue with ORSSerialPort because I can find more information about this library. Not a loth but more then SwiftSerial.

So the problem: If I create the ORSSerialPort object, it think that my parameters don't come through the constructor (init()). Because when i try to read the variables in the object I get a nil. Even when I do this: port?.baudRate = 9600 baudRate stays nil.

Here my code:

ViewController.swift

import Cocoa

var port: SerialParser?

class ViewController: NSViewController {


    override func viewDidLoad() {
        super.viewDidLoad()

        port = SerialParser(path: "/dev/cu.usbmodem14101")

    }

    override var representedObject: Any? {
        didSet {
        // Update the view, if already loaded.
        }
    }


    @IBAction func ledOn(_ sender: Any) {
        port?.open()
        port?.sendString(data: "1")
        port?.close()
    }


    @IBAction func ledOff(_ sender: Any) {
        port?.open()
        port?.sendString(data: "0")
        port?.close()
    }
}

SerialParser.swift

import Cocoa
import ORSSerial

class SerialParser : NSObject, ORSSerialPortDelegate {
    var port : ORSSerialPort?

    init(path: String){
        port = ORSSerialPort(path: path)
        print("path: \(port?.path)")
    }

    func open(){
        port?.baudRate = 9600
        port?.delegate = self
        if let portUnwraped = port {
            portUnwraped.open()
            print("path: \(portUnwraped.path) baudRate: \(portUnwraped.baudRate)")
        }else{
            print("port object empty");
        }
    }

    func close(){
        port?.delegate=nil
        port?.close()
        print("poort closed")
    }

    func sendString(data: String){
        let dataa = Data(data.utf8)
        port?.send(dataa)
        print("Data sended: \(data)")
    }

    func serialPortWasRemovedFromSystem(_ serialPort: ORSSerialPort) {
        print("PORT REMOVED")
    }

}

My output

path: nil
port object empty
Data sended: 1
poort closed
``

Answer 1

I just checked, the example OSRSerialPortDemo example from the ORSSerial library works straight out of the box on my M1 running Monterey. It however detects the USB port as usbmodem1101 or usbmodem1201, unlike the Arduino IDE which is detecting it as usbmodem14101 or the like when the Arduino is attached to the mac via a USB hub rather than directly to a USB port of the mac. I would suggest you to check you are hooked up directly to the mac, and to use the demo app to check the actual names of the serial port. As an alternative you may prefer to use the demo app and customize it to your needs.