[gpsd-users] gpsd to gpsd connection not working reliably

Hello,

for testing purposes inside a laboratory I want to connect several testing machines to one “GPS server” that has a USB GPS receiver connected.

I wanted to use the possibility of setting gpsd://<IP-ADDRESS>:<PORT> as an input device. But this does not reliably work.

Here is my setup:

“GPS server”:

sudo /usr/sbin/gpsd -b -S 3333 -D2 -N -G -F /var/run/gpsd.sock -P /var/run/gpsd.pid /dev/ttyUSB0

“Client” gpsd:

sudo /usr/sbin/gpsd -G -N -D9 -F /var/run/gpsd.sock -P /var/run/gpsd.pid gpsd://172.19.1.201:3333

I see the the detached message in the server when closing the gpsd on the client. And sometimes I even get data when using gpsmon to verify.

Gpsmon called with the IP and Port of the “gps server” always works on the client.

How can I reliably connect two instances of gpsd? Is this setup multiclient capable?

Here are the outputs with –D9 when starting both gpsds:

“GPS server”:

sudo /usr/sbin/gpsd -b -S 3333 -D5 -N -G -F /var/run/gpsd.sock -P /var/run/gpsd.pid /dev/ttyUSB0

gpsd:PROG: control socket opened at /var/run/gpsd.sock

gpsd:INFO: launching (Version 3.4)

gpsd:IO: opening IPv4 socket

gpsd:IO: opening IPv6 socket

gpsd:INFO: listening on port 3333

gpsd:PROG: NTPD shmat(0,0,0) succeeded, segment 0

gpsd:PROG: NTPD shmat(32769,0,0) succeeded, segment 1

gpsd:PROG: NTPD shmat(65538,0,0) succeeded, segment 2

gpsd:PROG: NTPD shmat(98307,0,0) succeeded, segment 3

gpsd:PROG: successfully connected to the DBUS system bus

gpsd:INFO: NTPD ntpd_link_activate: 1

gpsd:INFO: stashing device /dev/ttyUSB0 at slot 0

gpsd:PROG: changing to group 20

gpsd:INFO: running with effective group ID 20

gpsd:INFO: running with effective user ID 65534

gpsd:INFO: startup at 2014-08-01T12:18:49.000Z (1406895529)

“Client” gpsd:

sudo /usr/sbin/gpsd -G -N -D5 -F /var/run/gpsd.sock -P /var/run/gpsd.pid gpsd://172.19.1.201:3333

gpsd:PROG: control socket opened at /var/run/gpsd.sock

gpsd:INFO: launching (Version 3.9)

gpsd:IO: opening IPv4 socket

gpsd:IO: opening IPv6 socket

gpsd:INFO: listening on port gpsd

gpsd:PROG: NTPD shmat(0,0,0) succeeded, segment 0

gpsd:PROG: NTPD shmat(32769,0,0) succeeded, segment 1

gpsd:PROG: NTPD shmat(65538,0,0) succeeded, segment 2

gpsd:PROG: NTPD shmat(98307,0,0) succeeded, segment 3

gpsd:PROG: successfully connected to the DBUS system bus

gpsd:PROG: shmat() succeeded, segment 131076

gpsd:PROG: shared-segment creation succeeded,

gpsd:INFO: NTPD ntpd_link_activate: 1

gpsd:INFO: stashing device gpsd://172.19.1.201:3333 at slot 0

gpsd:INFO: running with effective group ID 20

gpsd:INFO: running with effective user ID 65534

gpsd:INFO: startup at 2014-08-01T12:18:41.000Z (1406895521)

From:	Florian Petry
Subject:	[gpsd-users] gpsd to gpsd connection not working reliably
Date:	Fri, 01 Aug 2014 13:16:30 -0000