查看APRS的源代码

== Decode APRS with RTL SDR ==

RTL2832U

* sdr windows driver: http://rtlsdr.org/softwarewindows
* sdr-radio V2: http://v2.sdr-radio.com/Support/RTLSDRs.aspx
* AGW Packet Engine http://www.sv2agw.com/downloads/default.htm
* AGWTracker


<pre>
pi@raspberrypi ~ $ rtl_fm -f 144640000 -s 22050 - | multimon -a AFSK1200 -t raw /dev/stdin
multimod  (C) 1996/1997 by Tom Sailer HB9JNX/AE4WA
available demodulators: POCSAG512 POCSAG1200 POCSAG2400 EAS AFSK1200 AFSK2400 AFSK2400_2 HAPN4800 FSK9600 DTMF ZVEI SCOPE
Enabled demodulators: AFSK1200
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000013

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
Found Rafael Micro R820T tuner
Oversampling input by: 46x.
Oversampling output by: 1x.
Buffer size: 8.08ms
Tuned to 144893575 Hz.
Sampling at 1014300 Hz.
Output at 22050 Hz.
Exact sample rate is: 1014300.020041 Hz
Tuner gain set to automatic.
AFSK1200: fm BH1RBH-7 to SYUYT9-0 via WIDE1-1,WIDE2-1 UIv pid=F0
`,6gl-+K\>=
AFSK1200: fm BH1RBH-7 to SYUYT7-0 via WIDE1-1,WIDE2-1 UIv pid=F0
`,6glA,K\>=
</pre>

<pre>
pi@raspberrypi ~ $  rtl_fm -f 144640000 -s 22050 - | multimon-ng -a AFSK1200 -A -t raw /dev/stdin
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000013

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
multimon-ng  (C) 1996/1997 by Tom Sailer HB9JNX/AE4WA
             (C) 2012/2013 by Elias Oenal
available demodulators: POCSAG512 POCSAG1200 POCSAG2400 EAS UFSK1200 CLIPFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3 HAPN4800
 FSK9600 DTMF ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI EEA EIA CCIR SCOPE
Enabled demodulators: AFSK1200
Found Rafael Micro R820T tuner
Oversampling input by: 46x.
Oversampling output by: 1x.
Buffer size: 8.08ms
Tuned to 144893575 Hz.
Sampling at 1014300 Hz.
Output at 22050 Hz.
Exact sample rate is: 1014300.020041 Hz
Tuner gain set to automatic.
APRS: BH1RBH-7>SYUYT9,WIDE1-1,WIDE2-1:',6fl##K\>=
</pre>


SDR Gateway:

<pre>
pi@raspberrypi ~/pymultimonaprs $ rtl_fm -f 144640000 -s 22050 -p 0 -g 42 - | multimon-ng -a AFSK1200 -A -t raw /dev/stdin
Found 1 device(s):
multimon-ng  (C) 1996/1997 by Tom Sailer HB9JNX/AE4WA
             (C) 2012/2013 by Elias Oenal
available demodulators:  0:  Realtek, RTL2838UHIDIR, SN: 00000013

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
 POCSAG512 POCSAG1200 POCSAG2400 EAS UFSK1200 CLIPFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3 HAPN4800 FSK9600 DTR SCOPE
Enabled demodulators: AFSK1200
Found Rafael Micro R820T tuner
Oversampling input by: 46x.
Oversampling output by: 1x.
Buffer size: 8.08ms
Tuned to 144893575 Hz.
Sampling at 1014300 Hz.
Output at 22050 Hz.
Exact sample rate is: 1014300.020041 Hz
Tuner gain set to 42.00 dB.
APRS: BH1RBH-7>0PPPZZ,WIDE1-1,WIDE2-1:'vX K\>EPRS=
</pre>

<pre>
pi@raspberrypi ~/pymultimonaprs $ pymultimonaprs -v
[2013-05-26 00:26:42]     INFO: connecting... 192.168.1.200:14580
[2013-05-26 00:26:42]     INFO: connected
[2013-05-26 00:26:42]     INFO: # aprsc 2.0.3-g898e4b5
[2013-05-26 00:26:42]     INFO: login BH1RBH-1 (PyMultimonAPRS 0.8.4)
[2013-05-26 00:26:42]     INFO: # logresp BH1RBH-1 verified, server COMCAT
[2013-05-26 00:26:44]    DEBUG: sending: BH1RBH-1>APRS,TCPIP*:=3959.40N/11627.00
[2013-05-26 00:26:44]    DEBUG: sending: BH1RBH-1>APRS,TCPIP*:>Running on Raspberry Pi
[2013-05-26 00:26:49]    DEBUG: sending: BH1RBH-7>0PPPZZ,WIDE1-1,WIDE2-1,qAR,BH1
[2013-05-26 00:27:50]    DEBUG: sending: BH1RBH-7>0PPPZZ,WIDE1-1,WIDE2-1,qAR,BH1RBH-1:'vX K\>EPRS=

[2013-05-26 00:34:40]    DEBUG: sending: BH1RBH-7>APK003,WIDE1-1,WIDE2-1,qAR,BH1RBH-1::EPRS     :test{0
</pre>

<pre>
2013-05-23 14:43:17 CST: BH1RBH-7>SYUYQ1,WIDE1-1,WIDE2-1,qAS,BY1WJ:`,7ml*<K\>=
2013-05-23 14:52:01 CST: BH1RBH-7>SYUYQ1,WIDE1-1,WIDE2-1,qAS,BY1WJ:',7ll,'K\>=
2013-05-23 14:53:12 CST: BH1RBH-7>SYUYQ1,WIDE1-1,WIDE2-1,qAS,BY1WJ:`,7ll"-K\>=
2013-05-23 14:53:54 CST: BH1RBH-7>SYUYQ0,WIDE1-1,WIDE2-1,qAS,BY1WJ:',7ml"-K\>=
2013-05-23 14:54:56 CST: BH1RBH-7>SYUYQ0,WIDE1-1,WIDE2-1,qAS,BY1WJ:',7ll"-K\>=
2013-05-26 00:26:49 CST: BH1RBH-7>0PPPZZ,WIDE1-1,WIDE2-1,qAR,BH1RBH-1:'vX<0x1c><0x1c> <0x1c>K\>EPRS= [Latitude and longitude are both 0]
2013-05-26 00:27:50 CST: BH1RBH-7>0PPPZZ,WIDE1-1,WIDE2-1,qAR,BH1RBH-1:'vX<0x1c><0x1c> <0x1c>K\>EPRS= [Latitude and longitude are both 0]
</pre>

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