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Re: Getting NMEA data out from gpsd for use in u-center

From: Nick Taylor
Subject: Re: Getting NMEA data out from gpsd for use in u-center
Date: Sat, 2 Oct 2021 08:30:29 +0100


We have managed to get NMEA data stream from gps device using kplex.

I think you should be able to split the feed with kplex to feed local gpsd and provide data on a port


On 2 Oct 2021 at 07:53, David Taylor <> wrote:

The aim is to get u-blox u-centre watching the NMEA output from a gps device.  

The gps is connected to a Raspberry Pi and running the latest gpsd correctly.
I've searched for answers but they elude me. Using Telnet on the Pi itself
produces a JSON header line


1. My understanding is that gpsd can output data on TCP/2947, however when
trying to connect to a the RPi from the PC I get:

C:UsersDavid>telnet raspi-25
(standard login/password prompt, can connect OK)

C:UsersDavid>telnet raspi-25 2947
Connecting To raspi-25...Could not open connection to the host, on port 2947:
Connect failed

but connecting from the RPi itself gives a JSON text line

2. There is mention of JSON coming from port 2947. Is there a way of getting
NMEA rather than JSON, or some program/function to send continuous NMEA on
another port?

3. I see that once the JSON line arrives, nothing else does. Ideally I would
just like a copy of the NMEA stream the GPS is sending to gpsd.

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