[aprssig] Flying Digipeaster Works (was APRS Question (Drone tracking of downed balloons)
Stephen H. Smith
wa8lmf2 at aol.com
Wed Jul 15 11:31:19 EDT 2020
On 7/15/2020 10:45 AM, Robert Bruninga wrote:
> 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.
I can't do much bout this, since the digi function in PicoAPRS is a complete
"black box" with no changeable parameters. It is hardwired to respond only to
"WIDE1-1". Currently,the only option is to turn the digi function on or off.
Another problem is that the path for PicoAPRS own originated beacons and
messages is hardwired to "WIDE1-1,WIDE2-2" . Arrrgh!!!
Reportedly, only about half the flash memory space in the ATmega CPU (same
processor as used in Arduinos) is currently being used. I am writing to the
German author of the PicoDIGI code to ask if he could provide menu options to
change the beacon paths and UIDIGI options.
The firmware seems to be under fairly active development, with new versions
every 6-9 months. The PicoDigi even does over-the-air update checks by sending
APRS messages with the version number to the developer once a day. If you are
within range of a bi-directional igate, you receive a return APRS message if a
new version is available. (This happened to me the very first time I turned
the device on.)
You then need a Windows PC with a USB port and an Internet connection to
download and flash the new firmware.
[The serial-over-USB port on the PicoAPRS uses the Silicon Labs (a.k.a.
"Silabs"0 CP210x USB>-->serial interface chip. This is the same chip used
in the Kenwood TH-D72 & D74 radios and Yaesu radios witha USB port. If you can
program Kenwood APRS handhelds, you already have the necessary USB<-->serial
driver installed to talk to the PicoAPRS.]
Stephen H. Smith wa8lmf (at) aol.com
EchoLink: Node # 14400 [Think bottom of the 2-meter band]
Home Page: http://wa8lmf.net
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