The following instructions were tested on Ubuntu 17.10.
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Install Emacs 25.2.2 using
sudo apt install emacs -
Start Emacs and run
M-x package-install xelb. -
Restart Emacs now (otherwise, you will run into an eieio error).
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Open measure.el, evaluate all expressions but the last one. Copy the last expression into the scratch buffer and evaluate it there.
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Plug in the FRDM-K66F, then remap Caps Lock to any key (e.g. “n”):
xmodmap -e 'keycode 66 = n N' -
Take measurements.