Serial Port Write in Hex on RFID Card

[mANOHAR pATIL]

I had write serial port in general like this in VB.NET

serialport1.write("W1", txt1.text)


I want to send HEX data but it is not write by above code.

I also tried it to write by usinf

serialport1.write("&H57&H01", txt1.text)

but it does not write on RFID card


Means does not open serial port for HEX writing

please provide me solution.

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