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So, my signal goes to true, but doesn't return to false once the wire is removed from GND. moreover, it doesn't happen every time. sometimes it works, sometimes it doesn't?

The standard 5i25_7i77x2.bit supports sserial on TB6

Do you have the added channel enabled in the hal file?

Hi all,I noticed that SOME conversational macros ( pocketing, Frame etc.) are currently missing from my install from last night? What key detail am I missing? I was under the impression they were part of the build? Im new to this and testing the software on my PC. 

See pics

other than that, looks great! 
Followed this install link kcjengr.github.io/probe_basic/quick_start.html 
 

Hi, i made it run (badly) with the 7i77 alone but decided to add a 7i84U for some further inputs to revive all features the machine originally had.
I can´t seem to make the TB6 sserial connection work with any bitfile included in the 5i25 repository. Its 6i25 P3 to P1 7i77 and TB6 to 7i84. Is there something available or something that might just work?
Best,
Lukas

Typically, unless you need linear encoder feedback, you can use servo/closed loop drives that
just have local feedback, (no feedback to LinuxCNC) so you don't need encoder inputs, other than
one for the spindle if you want to do spindle synchronized moves.

For a simple system, I would consider a 7I96S or 7I76EU (the main difference is the the 7I76EU has
more digital I/0.) If you are sure you want to add encoder feedback a 7I95T would make more sense,
though you can add an encoder daughtercard to a 7I96S or 7I76EU (7I85/7I89 = 4/8 added encoders)