Livegps incompatible to gpsd 2.92

[weller@…]

Hi!
Today I wanted to do some mapping using josm with Live-GPS (Version
20431) and surveyor (Version 19681) plugin.

I use Ubuntu 10.04 with josm-latest (Revision: 328) - it connects to
gpsd but after some time it simply disconnects.

This is the console output:

LiveGps tries to connect to gpsd
LiveGps: Connected to gpsd
LiveGps: Disconnected from gpsd}}

Here some extract from gpsd's logfile:
gpsd: client 127.0.0.1 (0) connect on fd 7
gpsd: => client(0):
{"class":"VERSION","release":"2.92","rev":"svn","proto_major":3,"proto_minor":1}

gpsd: checking client(0)
gpsd: <= client(0): w
gpsd: => client(0): =
[....]
gpsd: client(0) timed out before assignment request.
gpsd: detaching 127.0.0.1 (sub 0, fd 7) in detach_client

For me it seems livegps issues the wrong command: gpsd simply receives a
"w" - please refer to ​http://gpsd.berlios.de/client-howto.html - it
should be something like "?WATCH={"enable":true,"json":true}"...

See line 143 of LiveGpsAcquirer.java:
new byte[] { 'w', 13, 10 });

Anyone can confirm a working livegps plugin with gpsd 2.92?

Regards,

Andreas Weller

[anonymous]

Ticket #5014 has been marked as a duplicate of this ticket.

[anonymous]

Very likely an interface change in gpsd. They probably turned of some compatibility code. Could you provide an update? Depending on the fact how long the new interface exists there must be a workaround in livegps plugin or not.

[anonymous]

Replying to anonymous:

Very likely an interface change in gpsd. They probably turned of some compatibility code. Could you provide an update? Depending on the fact how long the new interface exists there must be a workaround in livegps plugin or not.

Please see ​http://gpsd.berlios.de/protocol-transition.html#_how_the_command_set_has_changed

[anonymous]

Replying to anonymous:

Depending on the fact how long the new interface exists there must be a workaround in livegps plugin or not.

AFAIK the code changed in dec. 2009 and the backwards compatibility was removed in march 2010...

[stoecker]

Removing outside world interfaces after 4 months? This is more than strange. 2 years would have been appropriate. So we need a workaround and support old as well as new variant.

[stoecker]

The question is what happens when we send first the "w" command and directly afterwards the new one. As the return is not checked anyway that may solve this issue.

[anonymous]

Replying to stoecker:

Removing outside world interfaces after 4 months? This is more than strange. 2 years would have been appropriate. So we need a workaround and support old as well as new variant.

That's simply not true - the change had first been announced abt. 2006/07

I suggest to completely discard the old protocol handler as gpsd will only support the new JSON interface starting with version 3.0

[framm]

I think it doesn't matter. Fact is, it's broken and somebody has to fix it. This ticket means exactly that - it's broken and somebody has to fix it. Now let's wait until somebody fixes it. I'm also downgrading to normal because while critical to the livegps plugin this is not critical to JOSM as a whole.

If you read this and are capable of Java programming, please fix it and submit a patch.

[stoecker]

Dropping old interface is no option. There are too many old installations around (e.g. mine) who can't update so easily. As already said - 4 months is much to little time. Java 6 was released 4 years ago and JOSM switching to Java6 makes more trouble than worth the effort.

[glebius]

watchers of ticket, please see this thread: ​http://lists.openstreetmap.org/pipermail/josm-dev/2010-June/004496.html

[stoecker]

See [o21622].