If I could find some software to work with the newer usb version of the meter on Linux, that would be best, but I was only able to find very old versions of the software that could not decode the format. So I just began to dump the format out and work out the coding myself.
A friend of mine sent me a link to some older command line software that worked with a previous RS-232 version of the meter, and the decoding routines worked with the usb version I have. Unfortunately this version of the software would not release the tty after it was ran once and then the program forced to quit. But I found even older software that couldn't decode the format, but properly handled connecting to the tty so it would disconnect on exit.
At that point I added a date and time stamp and called it done, this version is here:
|Example of the log output|
But I wasn't done yet. There are times when I need to take a reading, but can't see the LCD screen from where I am positioned. Also it might be nice if a blind person could use this meter to read out meter settings under Linux for low voltage things like Arduino or building a little circuit. So I decided to make the meter talk. This version is here:
I am thinking of making a graphical display of the meter, and graphical view of the logging to make things easier for non Unix people who are running Linux.
I was able to do this easily because I found this example code on how to use espeak library from a post on stackoverflow. I have a copy of the example code that I cleaned up a little bit here: