pianonix: try getting piano-led-visualizer to run

Still did not work, using raspberrypi os

hosts/pianonix/default.nix

@@ -26,6 +26,26 @@
     ../common/optional/avahi.nix
   ];
 
+  environment.systemPackages = [
+    (pkgs.python3.withPackages (p:
+      with p; [
+        numpy
+        pillow
+        flask
+        rpi-gpio
+        webcolors
+        psutil
+        mido
+        rtmidi-python
+        spidev
+        waitress
+        websockets
+        werkzeug
+
+        pkgs.frajul.rpi-ws281x-python
+      ]))
+  ];
+
   # disko.devices.disk.main.device = "/dev/mmcblk1";
 
   # enabled by fish, disabling speeds up builds
@@ -169,7 +189,7 @@
     };
   };
 
-  networking.firewall.enable = true;
+  networking.firewall.enable = false;
   networking.firewall.allowedTCPPorts = [
     5900 # for vnc
   ];
@@ -201,7 +221,7 @@
   hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = true;
   hardware.deviceTree = {
     enable = true;
-    filter = lib.mkForce "*-rpi-*.dtb";
+    filter = lib.mkForce "*-rpi-4*.dtb";
     overlays = [
       {
         name = "spi";
@@ -234,4 +254,23 @@
 
   ## My own Piano LED Visualizer
   services.piano-led-visualizer.enable = true;
+
+  ## Crude fix for avahi
+  systemd.timers.avahiRestart = {
+    description = "Restart avahi-daemon every 5 minutes";
+    wantedBy = ["timers.target"];
+    timerConfig = {
+      OnBootSec = "5min";
+      OnUnitActiveSec = "5min";
+      Unit = "avahiRestart.service";
+    };
+  };
+
+  systemd.services.avahiRestart = {
+    description = "Restart avahi-daemon service";
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.systemd}/bin/systemctl restart avahi-daemon.service";
+    };
+  };
 }

hosts/pianonix/hardware-configuration.nix

@@ -15,6 +15,7 @@
   boot.kernelModules = [];
   boot.extraModulePackages = [];
   boot.kernelPackages = pkgs.linuxKernel.packages.linux_rpi4;
+  boot.blacklistedKernelModules = ["snd_bcm2835"]; # Disables sound, required for ws281x to work
   # boot.supportedFilesystems = lib.mkForce [
   #   # remove zfs, since its incompatible with latest kernel
   #   "vfat"

modules/nixos/piano-led-visualizer.nix

@@ -26,6 +26,9 @@ in {
     users.users.${cfg.user} = {
       isSystemUser = true;
       group = cfg.group;
+      createHome = true;
+      home = "/home/${cfg.user}";
+      extraGroups = ["wheel" "gpio"];
     };
     users.groups.${cfg.group} = {};
 
@@ -36,11 +39,12 @@ in {
       wantedBy = ["multi-user.target"];
 
       serviceConfig = {
+        WorkingDirectory = "/home/${cfg.user}/Piano-LED-Visualizer";
         ExecStart = "${pkgs.frajul.piano-led-visualizer}/bin/piano-led-visualizer";
         Restart = "always";
         Type = "simple";
-        User = cfg.user;
-        Group = cfg.group;
+        # User = cfg.user;
+        # Group = cfg.group;
       };
     };
   };

pkgs/piano-led-visualizer/default.nix

@@ -1,10 +1,12 @@
 {
   lib,
   python3,
+  callPackage,
   fetchFromGitHub,
   ...
 }: let
   pythonPackages = python3.pkgs;
+  rpi-ws281x-python = callPackage ../rpi-ws281x-python {inherit python3;};
 in
   pythonPackages.buildPythonApplication rec {
     pname = "piano-led-visualizer";
@@ -36,7 +38,8 @@ in
       waitress
       websockets
       werkzeug
-      # rpi_ws281x
+
+      rpi-ws281x-python
     ];
 
     format = "setuptools";

pkgs/rpi-ws281x-python/default.nix

@@ -10,15 +10,12 @@ python3.pkgs.buildPythonPackage rec {
 
   src = fetchFromGitHub {
     owner = "rpi-ws281x";
-    repo = "rpi-ws281x-pytho";
+    repo = "rpi-ws281x-python";
     rev = "v${version}";
-    sha256 = "sha256-tnjvFDBa+sNX6dK6/I1/rRt62k15kTP+9J8eyFRFs/I=";
+    sha256 = "sha256-CVPibDs1QLeXhtoEBw3JplKIIUpzahjgJKy8GVy99Wk=";
     fetchSubmodules = true;
-    deepClone = true;
   };
 
-  # sourceRoot = "${src}/library";
-
   format = "setuptools";
 
   propagatedBuildInputs = with python3.pkgs; [
@@ -30,9 +27,6 @@ python3.pkgs.buildPythonPackage rec {
     sourceRoot="$sourceRoot/library"
   '';
 
-  # Some of the bindings compile C code, so you may need these
-  nativeBuildInputs = [python3.pkgs.setuptools pkgs.scons];
-
   meta = with lib; {
     description = "Python bindings for the rpi_ws281x C library";
     homepage = "https://github.com/rpi-ws281x/rpi-ws281x-python";