Checking out an old Radio Shack multimeter - with a special ability

I found this 1990s vintage Radio Shack multimeter in a storage cabinet at work and thought it was interesting enough to take a look at.

This one has a special trick that isn't very common in consumer level meters - it has a serial port for data logging.

Let's see if I can make it do anything interesting.

Here's some relevant links (as mentioned in the video) http://www.linuxtoys.org/dvm/dvm.html https://www.manualslib.com/manual/137713/Radio-Shack-22-218.html

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This isn't the only way to do it. It's probably not the best way to do it.

But it's how I do it. ... https://www.youtube.com/watch?v=x9CIb4ljFBQ