I must have something wrong because after flashing I get nothing. Serial monitor shows very low volts on the batters (between .66 and 1.7) But the same battery is over 4 volts in a different saber. So I know that battery is good. Looking for some help.
Config and marked up wiring diagram are attached. NPXL V3 connector wired independent from the blade. Single pixel crystal chamber. What have I done wrong?