I would like to know if there is a way to send a non-character byte through a terminal emulator. Bytes with values from 0 to 127 are (mostly) represented by characters on a keyboard (example: a, b,c...A,B,C.. 1,2,3..!,@,#..). But how can I type and send something that corresponds to a byte with value 137 for instance? I would like to send these types of "non-characters" over a serial connection to an arduino using a terminal program. I am currently using teraterm, but other terminal emulators might be fine too. BTW, the arduino code for receiving these bytes is working fine.
You can use send the character that you want by using the Alt key. Alt+137 will display the character ë. If you send that, the arduino will receive the appropriate byte.