controlling coolant w/serial port

Glad it worked for you! I'm still learning emc myself. One reason I offered to write it for you is because it didn't look too terribly hard, and because I'm needing to make a much more complex component for a pic-based board using serial communications, and I figured this one would be good to learn some things with.

Glad to be of help!

Well, since this is custom hardware it probably wouldn't be too useful as is for most people, but it might be good for an example of some sort I guess. Feel free to add it... or I could do it later. Put a GPL statement in it if you do...