Unable to shift to 25HZ Update rate (with Express kit (ZED F9P))

GPS/GNSS
1

Hello Everyone,
I’m currently facing an issue while trying to increase the update rate of my GNSS module.

I was successfully able to switch from 4 Hz to 10 Hz, but I’m unable to shift to 25 Hz for raw data or 20 Hz for RTK output. I’ve been attempting to make the change through the device’s local server interface using Wi-Fi access, but haven’t had any success beyond 10 Hz.

Has anyone experienced something similar or found a workaround?
Any help or suggestions would be greatly appreciated!

Thanks in advance.
Shujat

2

Hi Shujat (@Syed_Shujat_Ali ),

Try turning off all unnecessary messages, leaving only one Position-Velocity-Time message enabled. That would usually be the UBX-NAV-PVT binary message, or the NMEA GGA ASCII message.

You probably also need to disable some constellations. Try GPS+GALileo - ensure GLONASS and BeiDou are disabled. Or GPS on its own - disable the other three.

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I hope this helps,
Paul

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3

You’ll need to watch output volume on UART1 and UART2 vs baud-rate otherwise the interface will stall.

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