flexlib-go

Multi platform tools to interact with flexradio 6k series radio.

Currently, any tools, except the MQTT adapter require an instance of SmartSDR Windows/OSX/IOS to be running. DAX and DAX IQ Data is currently not "headless".

Installation

Option A) Binary Download

Download the latest binary release from https://github.com/hb9fxq/flexlib-go/releases

Option B) Install from source

Install GO https://golang.org/doc/install
Install CMDs

go get -u github.com/hb9fxq/flexlib-go/cmd/smartsdr-iqtransfer
go get -u github.com/hb9fxq/flexlib-go/cmd/smartsdr-mqttadapter
go get -u github.com/hb9fxq/flexlib-go/cmd/smartsdr-daxclient

Tools

Binary "smartsdr-iqtransfer"

Tool to transfer DAX IQ data from a FRS 6K Radio to any platform.

When you run smartsdr-iqtransfer, make sure, that you select the matching DAX IQ channel in Smartsdr.

fCenter is the center of the GUI Panadapter, it can be set via argument '--FCENTER' or changed while running by typing to stdin.

Options:

RADIO IP address of the radio
MYUDP UDP port on local machine that the radio will send VITA49 traffic. Must be a free port on your machine. Check your firewall!
CH DAX-IQ channel to stream.
FWD (Optional) Endpoint to send the Float32 IQ data to. If not supplied, the data is written to stdout and can be used for piping. You can find a sample for GNU Radio under https://github.com/hb9fxq/flexlib-go/tree/master/GRC/iq-transfer
RATE SampleRate in kHz, Possible Values: 24000 48000 96000 192000
FCENTER (Optional) Initially tune panadapter to fCenter in MHz, e.g. 7.1

e.g.

Send raw IQ data 127.0.0.1:2345

./smartsdr-iqtransfer --RADIO=192.168.92.8 --MYUDP=5999 --RATE=192000 --CH=1 --FCENTER=7.1 --FWD=127.0.0.1:2345

record IQ Data to a file

./smartsdr-iqtransfer  --RADIO=192.168.92.8 --MYUDP=5999 --RATE=192000 --CH=1 --FCENTER=7.1 --FWD=127.0.0.1:2345 > "$(date +"%FT%T").raw"

Binary "smartsdr-daxclient"

Receives RAW DAX audio streams (RX Channels 1-6)

Options:

RADIO IP address of the radio
MYUDP UDP port on local machine that the radio will send VITA49 traffic. Must be a free port on your machine. Check your firewall!
CH DAX audio channel to stream.
FWD Endpoint to send the Float32 IQ data to. If not supplied, the data is written to stdout and can be used for piping. You can find a sample for GNU Radio under https://github.com/hb9fxq/flexlib-go/tree/master/GRC/iq-transfer

e.g. Forward raw DAX audio stream from channel 1 to a computer on the network (FWD)

./smartsdr-daxclient --RADIO=192.168.92.8 --MYUDP=5999 --CH=1 --FWD=127.0.0.1:2345

LiveStream via ffmpeg with libopus transcoding

ffmpeg -flags low_delay -fflags nobuffer -f f32be -ar 24000 -ac 2 -i udp://127.0.0.1:2345 -acodec libopus -ar 24000 -f rtp rtp://127.0.0.1:1234 -sdp_file daxslice.sdp

Play RAW audio to the speaker. 2 Channels, 32 Bit float, big endian

socat -u udp-recv:2345 - | play -q -t f32 -r 24k --endian big -c 2 -

Binary "smartsdr-mqttadapter"

Tool to reflect most important radio status, like Slices, Panadapters and connected clients to a MQTT broker. Useful for status monitoring, dashboards or advanced radio integration.

./smartsdr-mqttadapter --RADIO=192.168.92.8 --MQTTBROKER=tcp://192.168.92.7:1883 --MQTTCLIENTID=flexdev --MQTTTOPIC=flexdev

Some experiments

The library is currently able to parse most of the VITA 49 types, that the FRS is using...

SoapySDR Module draft version based on flexlib-go with CGO bindings:

Reconstructed waterfall tile data from pcap:

Reconstructed opus audio from pcap:

https://soundcloud.com/frank-werner-hb9fxq-14069568/opus-decoded

Reconstructed FFT Plot (all captured fft points aggregated)

hb9fxq / flexlib-go