containerized librtlsdr
based on Arch Linux and using extra/rtl-sdr.
Default command starts rtl_tcp on port 1234 (IPv4 only due to rtl_tcp limitations).
Doesn’t use any environment variables right now, just use a custom command.
Don’t forget to add -a 0.0.0.0
% rtl_tcp -h
rtl_tcp: invalid option -- 'h'
rtl_tcp, an I/Q spectrum server for RTL2832 based SDR-receivers
rtl_tcp version 0.8 github.com/librtlsdr (Sep 4 2023)
rtl-sdr library 0.8 github.com/librtlsdr (Sep 4 2023)
Usage: rtl_tcp [-a listen address]
[-p control listen port (default: 1234)]
[-r response listen port: 0 = off; 1 (=default) for On at control listen port +1; or port]
[-I infrared sensor listen port (default: 0=none)]
[-W infrared sensor query wait interval usec (default: 10000)]
[-f frequency to tune to [Hz]]
[-g gain in dB (default: 0 for auto)]
[-s samplerate in Hz (default: 2048000 Hz)]
[-b number of buffers (default: 15, set by library)]
[-l length of single buffer in units of 512 samples (default: 32 was 256)]
[-n max number of linked list buffers to keep (default: 500)]
[-w rtlsdr tuner bandwidth [Hz] (for R820T/2 and E4000 tuners)]
[-d device index or serial (default: 0)]
[-P ppm_error (default: 0)]
[-O set RTL driver options seperated with ':', e.g. -O 'bc=30000:agc=0' ]
f=<freqHz> set tuner frequency
bw=<bw_in_kHz> set tuner bandwidth
bc=<if_in_Hz> set band center relative to the complex-base-band '0' frequency
puts the tuner frequency onto this if frequency (default: 0)
sb=<sideband> set tuner sideband/mirror: 'L' or '0' for lower side band,
'U' or '1' for upper side band. default for R820T/2: 'L'
agc=<tuner_gain_mode> activates tuner agc with '1'. deactivates with '0'
gain=<tenth_dB> set tuner gain. 400 for 40.0 dB
ifm=<tuner_if_mode> set R820T/2 tuner's variable-gain-amplifier (VGA). default: 10011
0: activate agc controlled from RTL2832's feedback
around 0: set gain in 10th dB. 408 for +40.8 dB
5000+val: set gain to val in 10th dB. 5408 for +40.8 dB
10000+idx: set gain idx 0 .. 15: 10015 for maximum gain
dagc=<rtl_agc> set RTL2832's digital agc (after ADC). 1 to activate. 0 to deactivate
ds=<direct_sampling> deactivate/bypass tuner with 1
dm=<ds_mode_thresh> set dynamic direct threshold mode or threshold frequency:
0: use I & Q; 1: use I; 2: use Q; 3: use I below threshold frequency;
4: use Q below threshold frequency (=RTL-SDR v3)
other values set the threshold frequency
harm=<Nth_harmonic> R820T/2: use Nth harmonic for frequencies above 1.76 GHz. default: 5
vcocmin=<current> set R820T/2 VCO current min: 0..7: higher value is more current
vcocmax=<current> set R820T/2 VCO current max: 0..7
vcoalgo=<algo> set R820T/2 VCO algorithm. 0: default. 1: with vcomax=3.9G. 2: Youssef/Carl
Tp=<gpio_pin> set GPIO pin for Bias T, default =0 for rtl-sdr.com compatible V3
T=<bias_tee> 1 activates power at antenna one some dongles, e.g. rtl-sdr.com's V3
[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]
[-D direct_sampling_mode (default: 0, 1 = I, 2 = Q, 3 = I below threshold, 4 = Q below threshold)]
[-D direct_sampling_threshold_frequency (default: 0 use tuner specific frequency threshold for 3 and 4)]
[-v increase verbosity (default: 0)]