Does the GPS module power up with just a USB cable connected? If it does then do that until you have a 3D fix and then power up the quad with a LiPo and see if the lock is retained. If it is then that's one option you have before each flight.

I have a similar issue on one of my quads where it will only get a 3D fix if first powered from USB (I use an Android phone to do that with the Betaflight Android app running so I can visually monitor the satellite acquisition status in the GPS tab), and once it has a 3D fix and plenty of satellites I then power it up with a LiPo after which the 3D fix and acquired satellites are retained, so I then take off and go flying.

If yours does the same then you can use that same pre-flight procedure, or look at getting a VIFLY GPS-mate which helps to do something similar.

Other options are one or more of the following:

1. Twist the wires running between the GPS module and the FC.
   
2. Wrap the wires running between the GPS module and the FC in insulated copper tape (which needs to be grounded at one end).
   
3. Mount the GPS module on top of the battery strap.
   
4. Design and 3D print a mount which hangs the GPS module off the back of the quad so it's as far away from the carbon frame and any electronics in the quad as possible.
   

Unfortunately it's all trial and error until you find a solution that works and which you deem to be acceptable.

No power for GPS with only usb. It needs lipo. I have Bliz Whoop F7 AIO.
Twisting wires doesn't help, thats tested already
This seem to be pretty common problem. I have some ideas to test, post here if theres any progression. Like to hear if someone have tackled this problem.

(16-May-2024, 07:50 PM)Pums Wrote: No power for GPS with only usb. It needs lipo. I have Bliz Whoop F7 AIO.

In that case a VIFLY GPS-mate might be your answer. It has a built in mini LiPo that powers up your GPS module without the FC needing to be connected to LiPo power so you can acquire a 3D fix before you then connect a LiPo. If it's something that might be of interest to you and you want to see how it works there are some overview / walkthrough videos on YouTube.

On that AIO, it seems the 5v for the RX is on the connector. Sometimes manufacturers label the USB 5v as 4.5v, but other times they don't make the distinction. You can test with a multimeter to see if that pin is powered with USB only.

Also you might try moving the GPS to the arm, some cameras have RF noise that affect the GPS reception. Otherwise you could make a very ugly mount like the GEPRC Tern.

I find that there is a huge differences between brands of GPS modules, and the only GPS modules that I had success with is the Matek GPSes. GPS modules that did "not" work well for me were the HGLRC M80 and Walksnail WS-M181, they where just not good.
 
I like to power GPS module from a FC 5V power that powered on when the USB is plugged in without powering the VTX, you can usually piggyback on the receiver, and I use GPS LUA scripts on my Jumper T Pro radio https://github.com/moschotto/OpenTX_GPS_Telemetry as to know when I have a GPS fix, and the log the flight. It's about 20 seconds to get a lock.

GPS seem to be impossible in this build. Don't know if it's walksnail, or the combination of the waksnail and the aio. I tried to shield gps wires with alufoil and took the gps 15cm away from the chassis, got 6 satellites. Walksnail powered off 13 sats.

Using GPS modules with Walksnail Avatar HD equipped quads has always been a huge problem. Until Caddx bother to address the issue and add some appropriate RF shielding to their VTX's like DJI do on their VTX's then you are probably going to be out of luck.

Out of interest, if you get 13 sats with the VTX powered off, does it then retain all or most of those acquired satellites when you then power up the VTX or does it immediately lose them all again?

(26-May-2024, 11:44 PM)SnowLeopardFPV Wrote: Using GPS modules with Walksnail Avatar HD equipped quads has always been a huge problem. Until Caddx bother to address the issue and add some appropriate RF shielding to their VTX's like DJI do on their VTX's then you are probably going to be out of luck.

Out of interest, if you get 13 sats with the VTX powered off, does it then retain all or most of those acquired satellites when you then power up the VTX or does it immediately lose them all again?

Unfourtunately I already gave up with GPS and removed it. I only was curious about speed, so no big loss.