OrangePi: mengoperasikan RTL-SDR
Jump to navigation
Jump to search
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