GNSS does not enter operational mode for a long time.

[Иван Петров]

Hello. I and many users of my app often encounter GPS signal jamming in their area (sometimes for over a day). After this, the phone can't determine its location for a long time (several hours), even though a nearby phone that wasn't using GPS at the time begins to locate quickly. I suspect this is due to incorrect information received by the module while the GPS jammer was active. How can this be fixed using Automate?
my app: https://llamalab.com/automate/community/flows/51860

[Henrik "The Developer" Lindqvist]

I doubt there's much Automate can do to overcome GPS jamming, since it's an hardware issue.

Try using the Location provider set state block to toggle the GPS off the on again. 

[Иван Петров]

My objective is not so much to combat the GNSS jammer itself, but rather to detect—and provide notification—the moment it ceases operation. The phone remains stationary; it knows its coordinates and recognizes when the signal is being jammed. However, after the jammer has been active for an extended period, the device takes a long time to return to normal operational mode—possibly due to the GNSS cache or something similar; I am not entirely sure. Unfortunately, toggling access to the GNSS receiver on and off does not resolve the issue. Is there perhaps a way to force the module to refresh its almanac and ephemerides? Or something along those lines?

среда, 13 мая 2026 г. в 15:57:04 UTC+3, Henrik "The Developer" Lindqvist:

[мJ ZЖУ]

Depend on your device type if you only use GNSS or other than it may have different refresh time have you try update the A-data?

[Иван Петров]

Block "Location get" uses GPS, and Max fix age is set to 0. How can I update A-GPS from Automate?

среда, 13 мая 2026 г. в 18:11:07 UTC+3, мJ ZЖУ:

[Henrik "The Developer" Lindqvist]

No, not in the public Android API for what i can see: https://developer.android.com/reference/android/location/LocationManager
There's a hidden API, requiring root/ADB, to inject "corrections", but i have no idea what it's for nor how and if it works, see: https://cs.android.com/android/platform/superproject/+/android-latest-release:frameworks/base/location/java/android/location/GnssMeasurementCorrections.java

[мJ ZЖУ]

If you still not certain about GNSS fix there's measure app which could check operation in background.

https://play.google.com/store/apps/details?id=com.google.android.apps.location.gps.gnsslogger

Maybe you could turn it off when location is good.