RS232 encoding

[Densa]

I am trying to send hex over rs232. When I physically connect Rx to Tx on the port all is fine untill I reach value &h80. I have tried changing the encoding to sport.Encoding = System.Text.Encoding. (then various types) But I am unable to get what should be a simple echo back of the hex value sent. Is there a way of setting up the port to be able to do this?

 

[JohnH]

Use one of the Encoding.UTF8/Unicode/UTF32 or other that support extended character set beyond the ASCII 127, using ASCII will send chr(63) (question mark) if above.

After having sent chr(128) to the loopback I get some strange result when using the ReadChar method (8364), but for example MsgBox(Asc(sport.ReadLine()(0))) will output correct 128, so will also the encoding GetChars method.

 

[Densa]

RS232 Encoding

Thats cracked it! Used UTF8 encoding, write(chr()) and readchar(). Now getting echo of hex sent. Many thanks for your help.

Densa