APRS on the Raspberry Pi: trying to decode APRS packets / 2017-01-20 - Koos van den Hout

2017-01-20 2 months ago
So the mobilinkd is now connected to serial over bluetooth on the Raspberry Pi, but now to get APRS data into aprx.

So far aprx does start but I see absolutely no data coming in, even when aprsdroid will see traffic. Something strange.
koos@joy:~ $ sudo aprx -v
2017-01-20 22:05:10.593 aprx start - 2.9.0
2017-01-20 22:05:10.594 TTY /dev/rfcomm0 opened
2017-01-20 22:05:20.624 CONNECT APRSIS aprsc.pa4tw.nl:14580
^C
2017-01-20 22:18:06.115 aprx ending (SIG 2) - 2.9.0
2017-01-20 22:18:06.116 aprx ending (SIG 2) - 2.9.0
It's a good thing aprsc.pa4tw.nl has an IPv6 address as this Raspberry Pi is only configured for IPv6.

Testing with minicom on /dev/rfcomm0 does show the startup messages from the mobilinkd but absolutely no APRS data in KISS format,,,
== BeRTOS AVR/Mobilinkd TNC2
== Version 2.0.1.571
== Voltage: 4019mV
== Starting.
Switching the mobilinkd between the Raspberry Pi and the smartphone with aprsdroid does seem to confuse something, it's not always showing data in aprsdroid either.

Installing the Linux ax25-tools and using kissattach and configuring aprx to use that interface doesn't help either.

Back to the KISS over serial port over bluetooth config I changed the setting 'bluetooth tracking' on the mobilinkd, which is advised for digipeater setups. And now I am seeing something:
koos@joy:~ $ sudo aprx -v
2017-01-20 23:12:17.568 aprx start - 2.9.0
2017-01-20 23:12:17.569 TTY /dev/rfcomm0 opened
9621    PE4KH-8   R     DB0NY>APZ17,DB0KX-2*,PE0FK-10*,PI1SHB*,PA7J-2*,WIDE2*,PI1APU*,LOCAL:!5103.84N/00736.63E#www.g07.de
2017-01-20 23:12:30.378 CONNECT APRSIS aprsc.pa4tw.nl:14580
9728    PE4KH-8   R     PI1APU>APND13:>W3,NL7      PAradigm    operation!
9831    PE4KH-8   R     PA3BXR-9>UQ5QW1,PA7J-2*,WIDE1*,PI1APU*,WIDE2-1:`zDKnA8>/]"3m}431.275MHz=
9867    PE4KH-8   R     PI1SHB>APRX29,PI1APU*,WIDE2-1:!5142.02N/00520.78E#PHG3460/2m Digi/IGate 's-Hertogenbosch
9934    PE4KH-8   R     PA5JB>APU25N,PE2KDK*,PI1APU*,WIDE2*:>202317zDX: PI1SHB 51.42.02N 5.20.78E 76.3km 133� 23:13
9942    PE4KH-8   R     PI1DFT>APMI01,PI1SHB*,PI1APU*,WIDE2*:@202317z5159.70N/00420.17E#WX3IN1 Digipeater 2 mtr. pi1dft ziggo.nl
10007   PE4KH-8   R     PI1APV-2>APMI04,PI1DFT*,PA7J-2*,WIDE1*,PI1APU*,LOCAL:@202318z5130.81N/00344.00EI digi vliegveld MIDDEN ZEELAND
10018   PE4KH-8   R     DB0OTV-2>APOT21,DB0KX-2*,PE0FK-10*,PI1SHB*,PI1APU*,WIDE2*:>FILL IN DIGI + D-Star + C4FM QRG = 439,500 MHz -7,6 MHz
10122   PE4KH-8   R     PE9R>APX204,PI1APU*,WIDE2-1:=5202.5 N/00439.0 E-PHG2290QRV PI6NOS/ PI2NOS
10175   PE4KH-8   R     PA7J-2>APMI01,PI1APU*,WIDE2*:@210000z5149.68N/00450.43E-WX3IN1 PA7J Digi & I-gate Hardinxveld
10209   PE4KH-8   R     PD0JAC-10>UQ4XS8,PI1SHB*,PI1APU*,WIDE2-1:`{Mym>5#/>"4/}=
10227   PE4KH-8   R     PA3BI-10>APRS,PI1DFT*,WIDE1*,PA7J-2*,WIDE2*,PI1APU*,LOCAL:!5214.65N/00426.30E-000/000www.isemann.nl/A=000696
10277   PE4KH-8   R     PI1APV-2>APMI04,PI1DFT*,PA7J-2*,WIDE2*,PI1APU*,LOCAL::PI1APV-2 :BITS.11111111,Telemetry
10316   PE4KH-8   R     PI1SHB>APRX29,PI1APU*,WIDE2-1:!5142.02N/00520.78E#PHG3460/2m Digi/IGate 's-Hertogenbosch
And the results are showing up via the aprsc dashboard on aprsc.pa4tw.nl. Almost all packets I receive and forward are rejected as duplicate packets, but I have seen some packets accepted. So I guess I'm not really needed as an I-gate.

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