I am currently working on a project in which I want to send file content (.txt document) via Xmodem to a COM port.
So far, so good. Now I noticed, however, that at the beginning and at the end of the transferred file content additional ASCII characters are transferred, which I must not and do not want to have there in this case.
First line of the text file: þ! <-- This should only contain the exclamation mark (before the exclamation mark there is a ä3/4) Last line of the text file: enQ <-- This should be an “end”
// In order to 4278 Data is transmitted in the form of byte blocks
private final int SECTOR_SIZE = 4278; //4278
I have adjusted the number of transmitted characters in the script so far, so that should not be the problem. Of course, I can be wrong, as I am still relatively inexperienced in the field of Xmodem.
For this reason, I would like to try my luck here and ask if anyone has any tips for me on how to fix the problem.
You can find the used script on this website:
https://ofstack.com/Java/19989/implement-the-xmodem-protocol-using-java.html
(The value in line 16 was changed (see above))