An iOS framework for easily handling the BLE connection with the FretX device

Implement FretxProtocol in your UIViewController. Then assign it as the delegate to the shared instance of the FretxBLE object

class ViewController: UIViewController, FretxProtocol {
    
    var fretx = FretxBLE.sharedInstance
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        fretx.delegate = self
        
    }
}

To conform with the protocol, you must overload three functions:

    public func didConnect() {
    }
    
    public func didDisconnect() {
    }
    
    public func didBLEStateChange(state: CBManagerState) {
    }

Start a scan and automatically connect to the FretX device when it's found (powered on) with:

fretx.connect()

Change the lights on the FretX device with:

fretx.send(fretCodes: [46,35,24,12,01,41,32,23,15,06])

The array to be used in fretx.send() is a [UInt8]. Each element is a two-digit number, where the first digit corresponds to the fret, and the second digit corresponds to the string. Valid values are:

Frets: 0,1,2,3,4
Strings: 1,2,3,4,5,6

where the 0th fret indicates an "open string", i.e. the blue light on the FretX device.

You can clear the LED matrix (turn off all the lights) with:

fretx.clear()