OrangePi: mengoperasikan RTL-SDR
Revision as of 08:07, 14 June 2018 by Onnowpurbo (talk | contribs)
Power Supply
Tampaknya power supply akan menjadi sangat penting sekali. Charger 5V 2.1A tampaknya kurang. Kalau arus kurang, maka tidak akan kuat mengangkat RTL-SDR-nya.
Instalasi Pendukung
sudo su apt-get update apt-get -y install git cmake build-essential libusb-1.0 libusb-1.0-0-dev \ libpulse-dev libx11-dev libpulse-dev libx11-dev python-pkg-resources qtcreator \ libtool autoconf automake libfftw3-dev
Instalasi Driver RTL-SDR
cd ~/ git clone git://git.osmocom.org/rtl-sdr.git cd rtl-sdr mkdir build cd build cmake ../ -DINSTALL_UDEV_RULES=ON make sudo make install sudo ldconfig
Deteksi Card / Dongle
rtl_test -s 1000000 -p 5
Hasilnya
Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Found Rafael Micro R820T tuner Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 Exact sample rate is: 1000000.026491 Hz [R82XX] PLL not locked! Sampling at 1000000 S/s. Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. Reading samples in async mode... real sample rate: 1000040 current PPM: 41 cumulative PPM: 41 real sample rate: 1000026 current PPM: 27 cumulative PPM: 34 real sample rate: 1000034 current PPM: 34 cumulative PPM: 34 real sample rate: 1000033 current PPM: 34 cumulative PPM: 34 real sample rate: 1000025 current PPM: 25 cumulative PPM: 32 real sample rate: 1000015 current PPM: 16 cumulative PPM: 29 real sample rate: 1000039 current PPM: 40 cumulative PPM: 31 ^CSignal caught, exiting! User cancel, exiting... Samples per million lost (minimum): 0
Instalasi multimonNG
cd ~/ git clone https://github.com/EliasOenal/multimonNG.git cd multimonNG mkdir build cd build qmake ../multimon-ng.pro make sudo make install
Decode APRS
# rtl_fm -f 144.800M -s 22050 | multimon-ng -t raw -a AFSK1200 -f alpha /dev/stdin rtl_fm -f 144.390M -s 22050 | multimon-ng -t raw -a AFSK1200 -f alpha /dev/stdin
Akan keluar kira-kira
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001
Using device 0: Generic RTL2832U OEM multimon-ng 1.1.5 (C) 1996/1997 by Tom Sailer HB9JNX/AE4WA (C) 2012-2018 by Elias Oenal Available demodulators: POCSAG512 POCSAG1200 POCSAG2400 FLEX EAS UFSK1200 CLIPFSK FMSFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3 HAPN4800 FSK9600 DTMF ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI EEA EIA CCIR MORSE_CW DUMPCSV X10 SCOPE Enabled demodulators: AFSK1200 Found Rafael Micro R820T tuner Tuner gain set to automatic. Tuned to 144643575 Hz. Oversampling input by: 46x. Oversampling output by: 1x. Buffer size: 8.08ms Exact sample rate is: 1014300.020041 Hz cb transfer status: 5, canceling... Failed to submit transfer 2 Please increase your allowed usbfs buffer size with the following command: echo 0 > /sys/module/usbcore/parameters/usbfs_memory_mb cb transfer status: 5, canceling... r82xx_write: i2c wr failed=-4 reg=0a len=1 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 rtlsdr_demod_write_reg failed with -4 rtlsdr_demod_read_reg failed with -4 WARNING: Failed to set sample rate. Output at 22050 Hz.
Kalibrasi Drift
cd ~/ git clone https://github.com/asdil12/kalibrate-rtl.git cd kalibrate-rtl git checkout arm_memory ./bootstrap ./configure make sudo make install
Kalibrasi
kal -s GSM900 kal -c 100
Instalasi MultimonAPRS
cd ~/ git clone https://github.com/asdil12/pymultimonaprs.git cd pymultimonaprs chmod a+x setup.py ./setup.py build sudo ./setup.py install
Edit
sudo nano /etc/pymultimonaprs.json
Siapkan
- Callsign
- Passcode - Passcode bisa di generate dari situs https://apps.magicbug.co.uk/passcode/index.php
- Latitude
- Longitude
Hasilnya,
{
"callsign": "NOCALL-10"
"passcode": "12345",
"gateway": ["euro.aprs2.net:14580","noam.aprs2.net:14580"],
"preferred_protocol": "any",
"append_callsign": true,
"source": "rtl",
"rtl": {
"freq": 144.390,
"ppm": 0,
"gain": 0,
"offset_tuning": false,
"device_index": 0
},
"alsa": {
"device": "default"
},
"beacon": {
"lat": -6.168589,
"lng": 106.865090,
"table": "R",
"symbol": "&",
"comment": "PyMultimonAPRS iGate",
"status": {
"text": "Running on OrangePi with RTL dongle",
"file": false
},
"weather": false,
"send_every": 300,
"ambiguity": 0
}
}
Edit init
sudo nano /etc/init.d/pymultimonaprs
#!/bin/sh
### BEGIN INIT INFO
# Provides: pymultimonaprs
# Required-Start: $all
# Required-Stop: $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start/stop of pymultimonaprs
### END INIT INFO
case "$1" in
start)
sudo pymultimonaprs --syslog &
;;
stop)
sudo killall pymultimonaprs
;;
*)
echo "Usage: /etc/init.d/pymultimonaprs {start|stop}"
exit 1
;;
esac
exit 0
Permission execute
sudo chmod +x /etc/init.d/pymultimonaprs
sudo update-rc.d pymultimonaprs defaults sudo reboot