SerialPort.Read(…) does not respect ReadTimeOut

Question

Got a bug in some legacy code which communicates with a payment terminal.

Just before a new payment is started, the code attempts to clear the internal read buffer o

Answer 1

maybe adding a test on port's 'bytes to read' may help steer clear of badly coded drivers:

length = (_serialPort.BytesToRead > 0) ? _serialPort.Read(buffer, 0, 512) : 0;

better still, use

_serialPort.DiscardInBuffer();

instead!