gps not working

[szekla]

Hello everyone

I cannot get cgps display GPS output
I have installed gpsd, gpsd-clients, python-gps packages
I am using holux m 215 gps receiver that identifies itself with lsusb as 10c4:ea60 Cygnal Integrated Products, Incorporated. cp210xUart bridge
when I look up the dev catalogue there is a file called @gps0
therefore I try to run
pi@raspberrypi:~$ sudo gpsd /dev/gps0 -F /var/run/gpsd.sock

then I try
pi@raspberrypi:~$ cgps -s
sadly there is no communication with GPS. After a second or so, there is a timeout message from cgps.
Any ideas?

[elatllat]

only time I used a gps with linux I used setty on the /dev/tty-gps-or-whatever
then was able to cat the data off the /dev/ttygpsow

[pjac]

I found restarting gpsd could help - this was using a USB-serial Microsoft GPS-360 dongle (blog post).

[cdaaawg]

I get the same timeout problem when running cgps. Also, xgps doesn't seem to be receiving data from gpsd. However, when I run

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gpsmon /dev/ttyUSB0

correct time and location data is displayed.

[sonicvanajr]

The trick to this is to pass the "-n" flag to gpsd.

-n
Don't wait for a client to connect before polling whatever GPS is associated with it. Some
RS232 GPSes wait in a standby mode (drawing less power) when the host machine is not
asserting DTR, and some cellphone and handheld embedded GPSes have similar behaviors.
Accordingly, waiting for a watch request to open the device may save battery power. (This
capability is rare in consumer-grade devices and nonexistent in USB GPSes which lack a DTR
line.)

[lyonzy]

@sonicvanajr you're a genius - works a charm

[thijsjek]

The trick to this is to pass the "-n" flag to gpsd.

-n
Don't wait for a client to connect before polling whatever GPS is associated with it. Some
RS232 GPSes wait in a standby mode (drawing less power) when the host machine is not
asserting DTR, and some cellphone and handheld embedded GPSes have similar behaviors.
Accordingly, waiting for a watch request to open the device may save battery power. (This
capability is rare in consumer-grade devices and nonexistent in USB GPSes which lack a DTR
line.)

Hey Sonicvanajr,

It helped me too, Thanks a lot!

[paddi2013]

The trick to this is to pass the "-n" flag to gpsd.

" $ sudo gpsd /dev/ttyAMA0 -F /var/run/gpsd.sock "

Where exactly should I put the "-n" ? Please and thank you

[joan]

The trick to this is to pass the "-n" flag to gpsd.

" $ sudo gpsd /dev/ttyAMA0 -F /var/run/gpsd.sock "

Where exactly should I put the "-n" ? Please and thank you

Most programs don't care about the order of options.

Use

man gpsd

to check if gpsd does.

[paddi2013]

thx man, appreciate it

[BuryMisiek]

For me that fix didn't help. If i try to:

gpsd /dev/ttyUSB0 -n -N

I'm getting

gpsd:ERROR: can't create IPv6 socket
gpsd:SHOUT: vendor/product match with 091e:0003 not found
gpsd:ERROR: PPS ioctl(TIOCMIWAIT) failed: 25 Inappropriate ioctl for device

gpsmon works fine and I'm getting data. Some ideas about that ?

[koza]

Hello Guys,

I know topic is old, but maybe I can help someone in the future.

I have USB GPS (HOLUX 215) and Raspbian. To make it work, I had to go through the following steps.

STEP 1:
Install drivers:

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sudo apt-get install gpsd gpsd-clients python-gps

STEP 2:
then run daemon gpsd

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sudo gpsd /dev/ttyUSB0 -F /var/run/gpsd.sock  

(not needed in my case! it was automatically added to the processes - you can check if it is a case in your case with ps -ef, also -n is not needed with USB)

and then

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cat /dev/ttyUSB0 

didn't return any results (nor my custom application in C).

STEP 3 - solution:
The solution is (after 5 hours of debugging...) that the serial port speed is not properly set. To set it, type:

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stty –F /dev/ttyUSB0 4800

Hope I will help someone with this small simple command .

Greetings from windy Warsaw, Poland!

Koza

[paulbirch]

Hi
Although old thread I get the same issue
BU 353 GPS via usb
gpsmon gives me lots of data

I have tried the -n flag and started undaemonized
pi@mrreese:/dev/serial $ sudo gpsd -n -N -D3 -F /var/run/gpsd.sock
gpsd:INFO: launching (Version 3.11)
gpsd:INFO: listening on port gpsd
gpsd:INFO: running with effective group ID 20
gpsd:INFO: running with effective user ID 110
gpsd:INFO: startup at 2016-01-19T10:12:46.000Z (1453198366)

when I start cgps -s on another terminal session gpsd gives me
gpsd:CLIENT: => client(0): {"class":"VERSION","release":"3.11","rev":"3.11-3","proto_major":3,"proto_minor":9}\x0d\x0a
gpsd:CLIENT: <= client(0): ?WATCH={"enable":true,"json":true};\x0a
gpsd:CLIENT: => client(0): {"class":"DEVICES","devices":[]}\x0d\x0a{"class":"WATCH","enable":true,"json":true,"nmea":false,"raw":0,"scaled":false,"timing":false,"split24":false,"pps":false}\x0d\x0a

cgps stops on the terminal after 4-5sec with
cgps: GPS timeout

and gpsd comes back with
gpsd:INFO: detaching ::1 (sub 0, fd 7) in detach_client

I have tried setting speed of ttyUSB to 4800 and other speeds

any help really appreciated

[SonOfAMotherlessGoat]

What messages do you get if you increase debug level from 3 to 5?

[ayrton88]

Hello,

I have the same issue, I tried everything in this page but nothing really worked.
When I run the
sudo cat /dev/ttyUSB0 I dont get any data either

I have tried to connect it using the UART too, but that didnt help either.
Any ideas?

[dloranger]

I too was fighting with the GPS (mine comes through on the serial port), I could not get cgps -s, or gpsmon to see any birds.

Found this https://learn.adafruit.com/adafruit-ult ... i/use-gpsd
which has the following nuggets that got everything up and running for me

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sudo systemctl stop gpsd.socket
sudo systemctl disable gpsd.sockett

followed by relaunching gpsd with the settings you want

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sudo gpsd /dev/ttyAMA0 -F /var/run/gpsd.sock

note I changed ttyAMA0 to use the "serial0" or "serial1" as recommended (forget where but I discovered that yesterday trying to figure out the serial port stuff) for compatibility between pi hardware revisions.

There is also this that describes using the PPS signal for higher accuracyhttps://forums.adafruit.com/viewtopic.p ... 60#p359668


hope this helps someone

[PiNambiAgas]

Hello All,
Really needed help! cygnal integrated products GPS is always showing NO FIX!
pls help me out I got to do this

[ripperon]

I can solve with this.
First take out the GPS on my window after that change the voltage from 3.3V to 5V and wait for connect to satelites
I did use the gpsmon for monitoring