Getting duplicate data after closing and opening the port

[poisa]

Hey, I'm really sorry for the noise as I'm sure this is completely user error (demo project works fine) but I'm having a strange issue and you're probably going to know what's wrong right away.

The first time I open the port it works fine but if I close it and open it again I'm getting double the data. If I do this again, I get triple data, etc, etc. Almost as if a callback is being set over and over again but never unset. I can't seem to find where this happens in my code.

This is how I'm opening the port:

    @IBAction func recordToggle(sender: AnyObject) {

        guard let port = serialPort else {
            return
        }
        let descriptor = ORSSerialPacketDescriptor(prefixString: "{", suffixString: "}", maximumPacketLength: 150, userInfo: nil)

        switch recordButton.state {
        case NSOffState:
            print("Closing serial port \(port)")
            port.stopListeningForPacketsMatchingDescriptor(descriptor)
            port.close()

        case NSOnState:
            print("Opening serial port \(port)")
            port.startListeningForPacketsMatchingDescriptor(descriptor)
            port.open()

        default:
            break
        }
    }

[haoyuant]

same issue here, any update?