Keypad works on bench but fails on door. Fix: Increase Wiegand pulse width from 50µs to 100µs (long cable = signal degradation).
Feature phones from brands like Itel, Tecno, Lava, and various Chinese manufacturers often run on chipsets (such as the popular SC6531E ). When these phones get locked or suffer from software glitches, a standard hardware button reset often will not work. spd keypad format tool