I have a FONA 808 that arrived today. I have connected it as follows:
5V - Powered from 5V rail
GND - Connected to 0V rail
Vio - Powered from 5V rail
Key - Connected to 0V rail
vBat - Connected to 3.9V via voltage divider (as described in the FONA FAQ for use without a battery)
I have no battery connected as I plan to run this from my standard power source.
When I connect everything I get a solid orange LED and blinking blue , red and green LEDS (about 3 second gaps - they don’t all blink together though). Connected or disconnecting the vBat line makes no difference at all. The LEDs flash if it is connected or not and applying the line causes no changes at all.
Should the blue LED be solid when it is powered?
I don’t believe I have done anything wrong. I have been very careful with my connections and have checked them time and time again.
Is the unit faulty perhaps? I am happy to buy another one to test in the meantime (as I have various projects planned with this unit) but would like to know if I have done something wrong of have a faulty unit.