This code reads data from an mitutoyo digital caliper over its spc interface. Output is done via a virtual serial port.
Uses the LUFA library, builds with avr-gcc. Firmware-upload with dfu-programmer.
Build around a 'tinymega' board from the hackerspace 'shackspace'
http://shackspace.de/wiki/doku.php?id=project:tinymega
Q: will it work with all mitutoyo devices?
A: unknown. I only tested an old 'IDU25' digital indicator
https://ca.rstenpresser.de/blag/2016/02/a-usb-interface-for-a-mitutoyo-caliper/
http://www.instructables.com/files/orig/FDD/XEP3/H2BMO532/FDDXEP3H2BMO532.pdf