I plan to deploy some borons in rural locations where cellular coverage might be weak (at least for Boron’s carrier). When I make the enclosure for the device, I will be bringing out some LEDs to show status. Two desirable features for display are (1) an LED that is on when the device is NOT connected, and (2) some indication of cell reception which doesn’t depend on first connecting, then getting RSSI. For (1) maybe the idea is to invert a gpio? Is there a better idea? For (2) I have no idea.
Why (2) would be useful - help the rural user determine whether reception is the problem when (1) is indicated, so they might move/select a better location for the device.