v1
This commit is contained in:
Lars Nolden
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{
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description = "SDR toolbox — programs for exploring an RTL-SDR stick";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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};
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outputs = { self, nixpkgs }:
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let
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system = "x86_64-linux";
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pkgs = nixpkgs.legacyPackages.${system};
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lib = pkgs.lib;
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# rtl_wmbus: demodulator that turns raw rtl_sdr I/Q into wM-Bus frames.
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# Not in nixpkgs, so build from source (tiny pure-C project).
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rtl_wmbus = pkgs.stdenv.mkDerivation {
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pname = "rtl-wmbus";
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version = "1.1.0";
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src = pkgs.fetchFromGitHub {
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owner = "xaelsouth";
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repo = "rtl-wmbus";
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rev = "1.1.0";
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sha256 = "1f9psbakvi0ymqmlbbnn96cbvd3bfphc90hw6xwid6r184pnzac6";
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};
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enableParallelBuilding = true;
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installPhase = ''
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runHook preInstall
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install -Dm755 build/rtl_wmbus $out/bin/rtl_wmbus
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runHook postInstall
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'';
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meta.description = "Software defined receiver for wireless M-Bus with RTL-SDR";
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};
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# wmbusmeters: reads/decodes wM-Bus (OMS) smart-meter telegrams. Dropped
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# from nixpkgs, so build from source. At runtime it shells out to
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# rtl_sdr | rtl_wmbus, so wrap those onto its PATH.
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wmbusmeters = pkgs.stdenv.mkDerivation {
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pname = "wmbusmeters";
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version = "3.0.0";
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src = pkgs.fetchFromGitHub {
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owner = "wmbusmeters";
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repo = "wmbusmeters";
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rev = "3.0.0";
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sha256 = "1nnirlnb12zdadsvsybj8h2g6fy7hc7ih488i2qaxzinm1faxagp";
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};
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nativeBuildInputs = [ pkgs.pkg-config pkgs.makeWrapper ];
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buildInputs = [ pkgs.rtl-sdr pkgs.libusb1 pkgs.libxml2 ];
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enableParallelBuilding = true;
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postPatch = ''
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patchShebangs scripts
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'';
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installPhase = ''
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runHook preInstall
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install -Dm755 build/wmbusmeters $out/bin/wmbusmeters
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ln -s wmbusmeters $out/bin/wmbusmetersd
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wrapProgram $out/bin/wmbusmeters \
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--prefix PATH : ${lib.makeBinPath [ pkgs.rtl-sdr rtl_wmbus ]}
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runHook postInstall
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'';
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meta.description = "Read wM-Bus / OMS smart meters (water, heat, gas, electricity)";
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};
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# oms-tui: full-screen TUI for monitoring OMS / wM-Bus meters. Wraps
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# wmbusmeters (put on PATH) and adds a live device list, detail view,
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# live AES-key entry, and CSV export/import.
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oms-tui = pkgs.python3Packages.buildPythonApplication {
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pname = "oms-tui";
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version = "0.1.0";
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pyproject = true;
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src = ./oms-tui;
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build-system = [ pkgs.python3Packages.setuptools ];
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dependencies = [ pkgs.python3Packages.textual ];
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nativeBuildInputs = [ pkgs.makeWrapper ];
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nativeCheckInputs = [
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pkgs.python3Packages.pytestCheckHook
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pkgs.python3Packages.pytest-asyncio
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wmbusmeters # exercises the real decode pipeline in the test suite
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];
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postFixup = ''
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wrapProgram $out/bin/oms-tui \
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--prefix PATH : ${lib.makeBinPath [ wmbusmeters ]}
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'';
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meta.description = "TUI monitor for OMS / wireless M-Bus smart meters";
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};
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# wmbus-listen: convenience wrapper around wmbusmeters for OMS discovery.
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wmbus-listen = pkgs.writeShellApplication {
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name = "wmbus-listen";
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runtimeInputs = [ wmbusmeters ];
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text = ''
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# Listen for wM-Bus / OMS smart-meter telegrams on 868.95 MHz via RTL-SDR.
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#
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# Usage:
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# wmbus-listen # discovery: show every telegram heard
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# wmbus-listen NAME DRIVER ID KEY # decode one meter's readings
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# e.g. wmbus-listen Water multical21 12345678 00112233445566778899AABBCCDDEEFF
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#
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# Env overrides:
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# WMBUS_MODES link modes to listen for (default: c1,t1 — typical OMS)
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# WMBUS_FORMAT output format: json | fields | hr (default: json)
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modes="''${WMBUS_MODES:-c1,t1}"
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format="''${WMBUS_FORMAT:-json}"
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if [ "$#" -eq 0 ]; then
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echo "Listening for OMS/wM-Bus telegrams (modes: $modes) on 868.95 MHz. Ctrl-C to stop." >&2
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echo "Unknown meters are printed as they are heard — note their id/driver to decode them." >&2
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exec wmbusmeters --format="$format" --listento="$modes" --verbose rtlwmbus
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else
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exec wmbusmeters --format="$format" --listento="$modes" rtlwmbus "$@"
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fi
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'';
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};
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sdrTools = (with pkgs; [
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rtl-sdr # rtl_test, rtl_fm, rtl_power — verify the stick works first
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sdrpp # modern spectrum browser with waterfall (run: sdrpp)
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gqrx # classic beginner-friendly waterfall receiver
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rtl_433 # decode 433/868 MHz sensors: weather stations, doorbells, meters
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dump1090-fa # ADS-B aircraft tracking on 1090 MHz with a live web map
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multimon-ng # decode POCSAG pagers, AFSK, DTMF (pipe rtl_fm into it)
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welle-io # DAB+ digital radio
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satdump # NOAA/Meteor weather satellite images
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noaa-apt # simple NOAA APT satellite image decoder
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# Heavier options — uncomment if wanted:
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# sdrangel # kitchen-sink SDR app, many digital modes
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# gnuradio # build your own DSP flowgraphs
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]) ++ [
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rtl_wmbus # wM-Bus demodulator (rtl_sdr | rtl_wmbus)
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wmbusmeters # decode OMS smart meters
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wmbus-listen # convenience: listen for OMS telegrams (see below)
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oms-tui # full-screen OMS monitor TUI
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];
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in
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{
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devShells.${system}.default = pkgs.mkShell {
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packages = sdrTools;
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shellHook = ''
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echo "SDR shell ready. Start with: rtl_test (OMS meters: wmbus-listen)"
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'';
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};
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packages.${system} = {
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inherit rtl_wmbus wmbusmeters wmbus-listen oms-tui;
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default = oms-tui;
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# Also expose the whole toolbox as one installable package set:
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# nix profile install .#sdr-tools
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sdr-tools = pkgs.buildEnv {
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name = "sdr-tools";
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paths = sdrTools;
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};
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};
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};
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}
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