[aprssig] location-based services (was RE: Group filtering bug in Kenwood TM-D710 (firmware version 2.10))

Guido Trentalancia iz6rdb at trentalancia.com
Wed Jul 20 19:39:52 EDT 2011

On Tue, 2011-07-19 at 17:36 -0400, Bob Bruninga wrote:
> Glad to hear that someone is using Bulletin Groups.
> Just remember that Bulletin Groups are EXCLUSIVE.  This means that if you set a BULLETIN GROUP name, that you will then automatically IGNORE ALL other bulletins and groups.  
> Can you share with us how you are using Bulletin Groups?

And the next development step will probably be location-based services.
This will be mainly based on Messages, but I do not exclude the
possibility to exploit the broadcasting properties of Group bulletins
(with new groups being created on-demand).

For example, an unknown (to a properly designed database) mobile station
enters the area of my automated station from surrounding areas. if
he/she is not already in the database, he/she must a traveller new to
the area. I was thinking of sending him/her a Message offering the
availability of information about the specific area. Such information
can be static (attractions, places of interest, sightseeing tips) or
gathered from the web.

So, it will be location-based and mostly on-demand to avoid sending
unwanted information.

What do you say ? Have you ever heard anything like that ?

> Thanks
> Bob, WB4APR


Guido IZ6RDB

> -----Original Message-----
> From: Guido Trentalancia [mailto:iz6rdb at trentalancia.com] 
> Sent: Tuesday, July 19, 2011 3:36 PM
> To: aprssig at tapr.org
> Cc: Bob Bruninga
> Subject: Group filtering bug in Kenwood TM-D710 (firmware version 2.10)
> Hello !
> It appears to me that the Kenwood TM-D710 with Operation Panel firmware
> version 2.10 (and possibly any other previously released version) has a
> bug/limitation within the "Group Filtering" menu settings (APRS) and in
> particular it does not appear to be fully compliant with the APRS
> protocol specification.
> Basically it is not possible to set the above mentioned filter for group
> bulletins with group names longer than 4 characters. The APRS protocol
> specifies that the Group Name for bulletins can be up to 5 characters
> long.
> Given the above, at present time, the Kenwood TM-D710 is not able to
> filter group bulletins having a group name of 5 characters and this
> constitutes a rather severe limitation.
> Can somebody please forward this message directly to Kenwod Engineering
> or Kenwood Support as appropriate ? Thanks.
> 73,
> Guido IZ6RDB

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