Questions tagged [gpsd]

Questions pertaining gpsd, a daemon that receives data from a GPS receiver, and provides the data back to multiple applications such as Kismet or GPS navigation software.

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GPSNMEA: symbol not found error

This is similar to the issue posted here. I'm trying to run a binary(gpslogger) of the following type: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-...
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1answer
309 views

Emulating an AARCH64 Binary calling libgps on x86_64 Ubuntu using QEMU gives “Error relocating: symbol not found” Errors

This is similar to the issue posted here and here. I want to reverse engineer a binary called gpslogger but before debugging it using GDB, I wish to simply emulate it using QEMU (qemu-aarch64) since ...
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297 views

Accessing USB GPS device from Python program running on virtual server

I have a ublox ZED-F9P GPS connected to the USB port on a Raspberry Pi that is successfully working with version 3.19 of the GPSD library. I can boot up the Pi and see the GPS info from cgps. I have a ...
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163 views

UART connection to GPS not working on Linux

I have a little problem with the GPS on my Beaglebone. I am trying to get a serial communication on one of the UARTs. However I do not get any response when I try to use cat. With the screen command I ...
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361 views

gpsd fails to start on boot, but does manually

Ok, I know there are variations of this problem out there. I have looked at nearly every one that looks like it might be pertinent and nothing works. I have a USB serial device that I set up to be on ...
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1answer
277 views

Feeding “mixed” NMEA to NTP for time correction

I am trying to correct the time on my Raspberry pi by feeding NTPD with GPS nmea data (via serial) and PPS (via GPIO pin) using the following tutorial via shared memory "SHM". http://www.unixwiz.net/...
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1answer
399 views

GPS starts emitting data as soon as I kill GPSD

I can't really figure out how GPSD works. If I start gpsmon nothing happens. But if I run sudo killall gpsd immediately position starts to appear on screen. The same happens in my node app. I start ...
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1k views

GPS device not detected by gpsctl

My GPS device (/dev/ttyUSB2) outputs NMEA sentences when connected to with minicom or cat, but when using gpsctl with gpsd (running gpsd /dev/ttyUSB2) the following output is generated: gpsctl: no ...
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775 views

preventing udev symlink overwrite

I built a PPS-capable GPS clock on my Raspberry Pi, and to get it to work, I needed to use udev to create symlinks to the hardware serial port and the kernel GPIO PPS on /dev/gps0 and /dev/gpspps0. ...
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1answer
279 views

How do I interpret the results of gpscat? [closed]

I've been trying to get gps data from an embedded system. This is the command I use: gpscat /dev/ttyS2 And I get a continuous stream of output like this: $GLGSV,1,1,03,70,14,098.6102,E,121853.000,...
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1answer
783 views

How do I use gpsdecode to output the results of gpscat in a readable manner?

I am connected to a processor with GPS attached through a USB-serial port. What I've been trying to do is read the GPS data by doing: gpscat /dev/ttyS2 | gpsdecode However, it's very slow and after ...
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1answer
1k views

How to read NMEA data from the Holux M-1200 GPS receiver

I have a Holux M-1200 GPS receiver and a pl2303 data cable. The cable appears as /dev/ttyUSB0, but when I turn on the receiver and cat /dev/ttyUSB0 the device, only random symbold appear, like this: ...
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1answer
718 views

gpsd on CentOS 7 not working after yum install

I've installed gpsd 3.10 (also tried 3.16) on CentOS 7 Minimal (yum install gpsd). The following dependencies have been pulled in as well: bluez-libs, gpsd-libs, libusbx. It seems to start up fine ...
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1answer
699 views

How to add a custom GPS location to a picture?

Given a .jpg picture without associated GPS coordinates, how would you suggest to add custom coordinates to it?
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274 views

Running Script on GPS Fix

I am working on an embedded device which is designed to capture images and I want to make it time and location aware. The device is currently a raspberry pi 2 running Debian Jessie. I have GPS set up ...
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1answer
6k views

using GPS with Linux & output only certain data

Hello I am currently using BU-353 S4 USB GPS in my Linux, the command, cgps -s Output various parameters including, Time, Latitutde, Longitute, Speed, Heading etc... is there any way to output ...
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792 views

How to resume the ?WATCH command when a USB GPS is reconnected

I have some hacks to ensure that my USB GPS devices continues spitting data if disconnected, then reconnected. The devices are so flaky that they need restarting so as to continue transmitting data. ...
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2answers
5k views

How to get ntp to use gpsd to update system date/time with a large offset

I have a GPS connected to my system, and if I change system time to be ahead/behind GPS time by less than 4 hours, ntpd ensures that the system time is updated to match that of the GPS. If, however, ...