LimeSDR
LimeSDR¶
Notes: If using gqrx make sure you select the correct antenna for data to work.
Scan for Possible Frequencies:
A frequency scanner for Gqrx Software Defined Radio receiver
Pager¶
Decoding POCSAG Pager Transmissions with rtl_fm and multimon-ng
Use GQRX as a pipe:
1. Click the three dots button on the bottom right of the window
2. Go to the Network Tab and set the UDP host and port to localhost:7355
3. Click the UDP Button To start the streaming
Use multimon-ng to demodulate and Interpret the signal:
nc -l -u 7355 | sox -r 48000 -t raw -b 16 -c 1 -e signed-integer /dev/stdin -r 22050 -t raw -b 16 -c 1 -e signed-integer - | multimon-ng -t raw -c -a POCSAG512 -a POCSAG1200 -a POCSAG2400 -a FLEX -a SCOPE -f alpha /dev/stdin
Boat Location¶
Modulator:
#
./rtl_ais -d 00000003 -h 127.0.0.1 -P 10110 -S 60
#View on OpenCPN
Decode Signals:
Decoding AIS maritime navigation Signals
simple AIS tuner and generic dual-frequency FM demodulator
Docker Container
Airplane Location¶
Aircraft Communications Addressing and Reporting System (ACARS)¶
- 131.550 MHz
ACARS SDR decoder
How to build a Airband receiver
Cellular Device¶
This program show you IMSI numbers of cellphones around you.
Building a Cellphone IMSI Catcher (Stingray)
Gnuradio blocks and tools for receiving GSM transmissions
Kalibrate GSM Search:
#Start to search for 900Mhz GSM stations :
kal -s 900 -g 49.6 -e 23
Temperature Sensors¶
Program to decode radio transmissions from devices on the ISM bands
Running on a Limesdr:
rtl_433 -driver=soapysdr -t "antenna=LNAW,bandwidth=4.5M"
Cordless Phone¶
real-time DECT voice channel decoding by Gnuradio
Voice Radio¶
This includes the radios of the following
- Police scanner
- EMS
- Taxis
- Fire
P25¶
- Use the following Frequencies ~860 MHz, ~500 MHz + others
decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR).
osmocom OP25
SDR software for capturing trunked radio systems
RF side of Radiocapture's SDR based trunked radio bulk collection system
runk Recorder is able to record the calls on a trunked radio system
DMR/MotoTRBO¶
DSD from GQRX:
#Make the temp Pipe
mkfifo /tmp/sdr_pipe
# Pipe the GQRX to std input
socat UDP-RECV:7355 - | ./dsd -i /dev/stdin -o /tmp/sdr_pipe
# Play Audio from the pipe
aplay -r 8000 -f S16_LE -t raw -c 1 < /tmp/sdr_pipe
Oneline P25 Listening:
./dsd -f1 -mc -i <(rtl_fm -F1 -o4 -g32 -f 484.7918M -s48000 -) -o >(aplay -r 8000 -f S16_LE -t raw -c 1)
POCSAG/FLEX-A¶
Weather Balloon Signals¶
Frequency: 400-406 MHz
Automatically Track Radiosonde Launches using RTLSDR or AirSpy SDRs
400-406 MHz radiosonde decoding
Amateur Radio¶
- Frequency: 126 MHz