private void Start()
{
LoadPersistedState();
_spi = new Spi(_posId, _serialNumber, _eftposAddress, _spiSecrets); // It is ok to not have the secrets yet to start with.
_spi.SetPosInfo("assembly", "2.6.3");
_spi.StatusChanged += OnSpiStatusChanged;
_spi.PairingFlowStateChanged += OnPairingFlowStateChanged;
_spi.SecretsChanged += OnSecretsChanged;
_spi.TxFlowStateChanged += OnTxFlowStateChanged;
_spiPreauth = _spi.EnablePreauth();
_spi.Start();
Console.Clear();
Console.WriteLine("# Welcome to MotelPos!");
PrintStatusAndActions();
Console.Write("> ");
AcceptUserInput();
}
