Unlocking Wires and Logic Gates early in the playthrough does not enable all the features. I didn't have enough research points to get Global Wire Transmitters at the same time.
Steps to Reproduce:
Signal Processor configured for an integer 5 -> wire segment -> Display.
Expected Behavior:
5, Bright green wire, a 5 on the Display.
Result:
red-tinted SP, dark wire, blank display.
Also tried: Button is always null no matter the toggle. Belt Reader constantly displays the spinner/throbber and never outputs a signal.
I did not test again until I bought GWT and also hit the milestone advancing to Pin Pushers. It works after that. I'm not sure if all signal generation requires the Transmitter technology unlock, or it's enabled in the milestone progression.