private byte ReadUnitId()
{
var wData = new byte[PieDevice.WriteLength];
wData[1] = 214;
var result = 404;
while (result != 0)
{
result = PieDevice.WriteData(wData);
}
var rData = new byte[PieDevice.ReadLength];
result = 304;
while (result != 0)
{
result = PieDevice.ReadData(ref rData);
}
return(rData[1]);
}
