So I’ve had a Boron LTE running for a couple months. Repurposed it (no firwmare in either case, just a new case and power supply) and sometimes it either:
- Doesn’t boot, LED is dim
- Boots to searching for cell signal (flashing green), but before attempt to connect (flashing cyan) the LED briefly dims and unit reboots (endless cycle)
- Only 5V power supply to USB pin
- Only LiPo battery (from a Boron 2/3G)
- Both power supply and battery
- A different power supply
Monitoring power, strong 5V in all cases, no dips with a min/max Fluke meter. I monitored mA when it does connect; start at about 35 (flashing green), jump to ~110 during (flashing Cyan), fall down to 20 or less (breathing Cyan).
Even odder, when I put this Boron (with no battery) alongside Electron 3G (with LiPo battery) in a parallel powered circuit via perfboard (one 700mA power supply) it ALWAYS boots - just doesn’t boot by itself. I continuity/resistance tested the circuit with the same Fluke meter but don’t see any stray leakage anywhere, and doubt Electron is acting like a capacitor since Boron doesn’t always boot by itself with a charged LiPo battery (since no pins output voltage when LiPo connected).
Seems to be no rhyme or reason.