Sometimes it is desirable to ignore all incoming data while still maintaining the serial port opened. The ser.sinkdata property allows you to do just that.
Set the ser.sinkdata to 1- YES, and all incoming data will be automatically discarded. This means that the on_ser_data_arrival event will not be generated, reading ser.rxlen will always be returning zero, and so on. No data will be reaching its destination even in case of buffer redirection . Escape characters , however, will still be detected in the incoming data stream.