I need to send to my Arduino some commands from the AVRDUDE command set. There are various bytes such as 0x41, 0x80 and so on. Not all of them represent simple ASCII characters that I can type and send to Serial Monitor.
And I don't want to change my sketch so that it begins to accept some characters instead of, say, 0x80 and other "non'ASCII" bytes. It would be fine to use exact AVRDUDE protocol.
So, can I send the byte 0x80 or 0x00 or 0x01 directly via Arduino Serial Monitor?
Thanks!
You might be able to send octal values using the \nnn sequence. This would require converting the hex values to octal, though.
Using a text entry panel to send non-text data doesn't seem like the right thing to do, though. If it's just to test stuff, that's one thing. If it's meant to be used long term, you are probably better off writing your own application that can send hex values more directly.
Those are two "expert" TTY programs that might help:
Thank you! The very 1-st of links helped me. Now I can continue my investigation 
You see, it is not for constant use. I try to make an ISP from ArduinoMega. So far to no avail.