[aprssig] Flying Digipeaster Works (was APRS Question (Drone tracking of downed balloons)

Robert Bruninga bruninga at usna.edu
Wed Jul 15 10:45:03 EDT 2020

Since 98% of most APRS traffic any one station hears is from digis, and not
direct from actual stations, one way to look only for original packets is
to set the drone-digi to digipeat UIDIGI path of "WIDE1-1" and sisable the
UIFLOOD or UITRACE that do the WIDEn-N routing.  Then it will only respond
to the initial transmitted packet from any given mobile, and tnot the
digipeated packete from the surrounding digis.

But since this will also reduce the viable traffic "heard" by 98% too, you
might not have any nearby mobiles in motion using WIDE1-1 either...

Just a thought.

On Wed, Jul 15, 2020 at 1:13 AM Stephen H. Smith via aprssig <
aprssig at lists.tapr.org> wrote:

> > On Fri, 12 Jun 2020, Stephen H. Smith wrote:
> >
> >> Wow!  I never heard of this device before.  Looks like it would be
> perfect on
> >> my drone with a micro-stubby duck.  I'm ordering one today!
> >>
> >> The manual appears to be for a previous version of the firmware and
> doesn't
> >> mention the digi function.   More concerning, the manual seems to imply
> the
> >> transmit path is hardwired to WIDE1-1,WIDE2-2 , which would be
> horrendous up
> >> in the air several hundred feet.  Perhaps the newer firmware can let
> you set
> >> the path as needed.
> >>
> >> The other question not answered by the manual:   It refers to using the
> >> device as a TNC or GPS for an external computer.  It DOESN'T mention
> what
> >> kind of serial<-->USB driver is required to create the virtual COM port.
> >>
> I've receive the PicoAPRS device and have it piggybacked on my Autel EVO
> drone.
>   I've had it up for a couple of test flights and can confirm that the
> PicoAPRS
> Velcroed to the top of the drone doesn't seem to affect the flight
> dynamics of
> the drone at all.
> Full details on the "Flying Digipeater", including pics, are here on my
> website:
>     <http://WA8LMF.net/FlyingDigi>
> I've had the "Flying Digi" up at about 15 feet above ground level so far,
> testing for stability and EMI/RFI issues between the drone's radios &
> electronics and the PicoAPRS transceiver.  So far, no problems observed.
> Later this week, I'mm going to send it up to around 350 feet and see how
> much
> APRS traffic it digis from around lower Michigan.
> _________________________________________________________
> Stephen H. Smith    wa8lmf (at) aol.com
> Skype:        WA8LMF
> EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
> Home Page:          http://wa8lmf.net
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> Live Off-The-Air APRS Activity Maps
>     <http://wa8lmf.net/map>
> Long-Range APRS on 30 Meters HF
>     <http://wa8lmf.net/aprs/HF_APRS_Notes.htm>
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