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Full Discussion: Serial Lines Explained
Top Forums UNIX for Dummies Questions & Answers Serial Lines Explained Post 302912179 by edfair on Wednesday 6th of August 2014 11:32:31 AM
Old 08-06-2014
Since most serial communications is via a UART this might help with the data transfer part:
Universal asynchronous receiver/transmitter - Wikipedia, the free encyclopedia

The UART voltage swings are between 0 and 5 volts. This signal is inverted and expanded to higher voltages by line drivers for transmission and inverted again and reduced to 0/5 swings by line receivers on the receiving end.

The transmitted signal starts degrading immediately and at higher transmission speeds it can be expected to be useless beyond 50 feet due to RC effects. (with a scope you would see rounding of what started as sharp shapes of voltage transitions)
 

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TRANSMISSION-EDIT(1)					    BSD General Commands Manual 				      TRANSMISSION-EDIT(1)

NAME
transmission-edit -- command-line utility to modify .torrent files' announce URLs SYNOPSIS
transmission-edit [-h] [-a url] [-d url] [-r search replace] torrentfile(s) DESCRIPTION
transmission-edit command-line utility to modify .torrent files' announce URLs OPTIONS
-h --help Show a short help page and exit. -a --add URL Add an announce URL to the torrent's announce-list if it's not already in the list -d --delete URL Remove an announce URL from the torrent's announce-list -r --replace search replace Substring search-and-replace inside a torrent's announce URLs. This can be used to change an announce URL when the tracker moves or your passcode changes. EXAMPLES
Update a tracker passcode in all your torrents: $ transmission-edit -r old-passcode new-passcode ~/.config/transmission/torrents/*.torrent AUTHORS
Jordan Lee SEE ALSO
transmission-create(1), transmission-daemon(1), transmission-edit(1), transmission-gtk(1), transmission-qt(1), transmission-remote(1), transmission-show(1) http://www.transmissionbt.com/ BSD
June 9, 2010 BSD
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