Initialise serial port in factory

SwiftyCar/Sources/SwiftyCar/VehicleFactory.swift

@@ -1,5 +1,5 @@
 //
-//  File.swift
+//  VehicleFactory.swift
 //  
 //
 //  Created by Michael Pivato on 20/5/20.
@@ -22,6 +22,10 @@ func getVehicle2D() throws -> Vehicle2D? {
             // TODO: Get from environment variable. tty won't work in macos anyway.
             // We share the serialport object, as cu will block on macOS (required by SwiftSerial), so can't open 2 of the same port.
             let serialPort = SerialPort(path: "/dev/ttyUSB0")
+
+            // The port does not open/initialise inside of the ESP32ServoOutputs, as on macOS /dev/cu.* blocks.
+            try initPort.openPort()
+            initPort.setSettings(receiveRate: .baud115200, transmitRate: .baud115200, minimumBytesToRead: 1)x
             guard let throttlePin = Esp32ServoOutput(forChannel: 1, forPin: 14, onPort: serialPort) else {
                 print("Failed to create throttle pin.")
                 return nil