You will recall that I built an X-axis (cross-slide) DRO for my Atlas-Craftsman Lathe using an Harbor Freight caliper.
I also had an iGaging setup for the Z (carriage) axis, pretty much out of the box.
So it turns out that several folks, most prominently Yuri has done a lot of work to make a Bluetooth adapter for iGaging (and other) DRO scales that interfaces with tablets, phones and so forth.
Yuri is selling adapters, but he has also developed and documented Arduino solutions that work with his TouchDRO app.
So I bought a cheap refurbished tablet, breadboarded up the Arduino circuit, and got the Z axis working!
Next steps:
See if I can get the TouchDRO tablet app working with the Harbor Freight X axis setup.
Create the Arduino code combining the X axis with the iGaging Z axis setup.