I am using the NEO-M9N breakout, but after power on I get no flashes from the PPS led. I have tried both indoor and outdoor, for 5+ minutes, with no luck. What troubleshooting options do I have?
What antenna are you using?
Which breakout do you have? There are two breakouts without antennas, and one with a chip antenna.
The antenna cable connector for the U.FL option is extremely finicky and must be inserted with care, best only once.