[aprssig] More on polling the d7/ d700

[Robert Bruninga]

>>> brianbr at mac.com 1/13/05 10:52:19 PM >>>
>NO! The "?APRS?" message does not get ACKed it 
>just causes a POSIT to be sent.

Just for clarity.  There is an APRS "Query" packet that 
is simply ?APRS? which causes all stations on freq
to respond randomly in the next 2 minutes.
.  These days that is a mess, dont do it.

There is a directed Query which is the same thing
sent as a message to one station.  It's may or may-not
ACK the message, but also then may respond in
a shorter random timer,...

Bob


On 1/13/05 1:03 AM, "Curt Mills" <archer at eskimo.com> wrote:

> On Wed, 12 Jan 2005, Wes Johnston wrote:
> 
>> We tried it and the ?APRSS message packet makes the radio ACK the
message,
>> then
>> a few seconds later send a posit.  This non-contiguous ACK/POSIT
adds enough
>> uncertainly that I don't think this will be the solution I was
looking for.
> 
> Wait a minute...  I thought queries were supposed to not have any
> sequence ID, therefore they shouldn't be ack'ed, right?  Were you
> sending it a standard message (which requires an ACK), or a query
> (which shouldn't)?




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