diff --git a/hosts/containers/public-access-proxy/configuration.nix b/hosts/containers/public-access-proxy/configuration.nix
index e0a8a7b1..8d75a5c1 100644
--- a/hosts/containers/public-access-proxy/configuration.nix
+++ b/hosts/containers/public-access-proxy/configuration.nix
@@ -43,7 +43,7 @@
         proxyTo = { host = "172.22.99.170"; httpPort = 80; httpsPort = 443; };
       }
       {
-        hostNames = [ "error.hq.c3d2.de.de" ];
+        hostNames = [ "error.hq.c3d2.de" ];
         proxyTo = { host = "172.20.73.47"; httpPort = 80; httpsPort = 443; };
       }
     ];
diff --git a/hosts/inbert-containers/ticker/configuration.nix b/hosts/inbert-containers/ticker/configuration.nix
index 4afba5c3..c9ff71f2 100644
--- a/hosts/inbert-containers/ticker/configuration.nix
+++ b/hosts/inbert-containers/ticker/configuration.nix
@@ -77,5 +77,13 @@ in
       url = "https://dresden.bits-und-baeume.org/termine.ics";
       color = "#3FBF3F";
     };
+    exma-stuta = {
+      url = "https://www.exmatrikulationsamt.de/ics/v1/stuta.ics";
+      color = "#7F7FFF";
+    };
+    exma-nawa = {
+      url = "https://www.exmatrikulationsamt.de/ics/v1/nawa.ics";
+      color = "#3F3FBF";
+    };
   };
 }
diff --git a/hosts/pulsebert/configuration.nix b/hosts/pulsebert/configuration.nix
index 78b6b6d0..503a5224 100644
--- a/hosts/pulsebert/configuration.nix
+++ b/hosts/pulsebert/configuration.nix
@@ -4,9 +4,12 @@
 
 { config, pkgs, ... }:
 
+let
+  octoprintPort = 8080;
+in
 {
   imports = [ # Include the results of the hardware scan.
-    ./hardware-configuration.nix
+    <this-host/hardware-configuration.nix>
   ];
 
   boot.loader.grub.enable = false;
@@ -119,27 +122,75 @@
   services.avahi = {
     enable = true;
     publish.enable = true;
+    publish.addresses = true;
     publish.userServices = true;
   };
 
-  # Enable the X11 windowing system.
-  # services.xserver.enable = true;
-  # services.xserver.layout = "us";
-  # services.xserver.xkbOptions = "eurosign:e";
+  security.acme = {
+    acceptTerms = true;
+    email = "mail@c3d2.de";
+  };
+  services.nginx = {
+    enable = true;
+    #recommendedGzipSettings = true;
+    recommendedProxySettings = true;
+    virtualHosts = {
+      "drkkr.hq.c3d2.de" = {
+        default = true;
+        enableACME = true;
+        forceSSL = true;
+        locations."/" = {
+          proxyPass = "http://127.0.0.1:${toString octoprintPort}";
+          proxyWebsockets = true;
+          extraConfig = ''
+            proxy_set_header X-Scheme $scheme;
+            proxy_set_header Accept-Encoding identity;
+          '';
+        };
+      };
+    };
+  };
+  services.octoprint = rec {
+    enable = true;
+    port = octoprintPort;
+    # extraConfig.webcam = {
+    #   snapshot = "http://localhost:5050?action=snapshot";
+    #   stream = "http://octoprint.local:5050?action=stream";
+    # };
+    # plugins = let
+    #   python = pkgs.octoprint.python;
 
-  # Enable touchpad support.
-  # services.xserver.libinput.enable = true;
+    #   octoprint-filament-sensor-universal = python.pkgs.buildPythonPackage rec {
+    #     pname = "OctoPrint-Filament-Sensor-Universal";
+    #     version = "1.0.0";
 
-  # Enable the KDE Desktop Environment.
-  # services.xserver.displayManager.sddm.enable = true;
-  # services.xserver.desktopManager.plasma5.enable = true;
+    #     src = pkgs.fetchFromGitHub {
+    #       owner = "lopsided98";
+    #       repo = pname;
+    #       rev = "8a72696867a9a008c5a79b49a9b029a4fc426720";
+    #       sha256 = "1a7lzmjbwx47qhrkjp3hggiwnx172x4axcz0labm9by17zxlsimr";
+    #     };
 
-  # Define a user account. Don't forget to set a password with ‘passwd’.
-  # users.users.jane = {
-  #   isNormalUser = true;
-  #   extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+    #     propagatedBuildInputs = [ pkgs.octoprint python.pkgs.libgpiod ];
+    #   };
+    # #in p: [ octoprint-filament-sensor-universal ];
+    # in p: [];
+  };
+
+  # Allow access to printer serial port and GPIO
+  users.users.${config.services.octoprint.user}.extraGroups = [ "dialout" "gpio" ];
+
+  # services.mjpg-streamer = {
+  #   enable = true;
+  #   inputPlugin = "input_uvc.so -r 1280x720";
   # };
 
+  # Allow gpio group to access GPIO devices
+  users.groups.gpio = { };
+  services.udev.extraRules = ''
+    KERNEL=="gpiochip*", GROUP="gpio", MODE="0660"
+  '';
+
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave
diff --git a/krops.nix b/krops.nix
index 124ee6d4..2b7c132b 100644
--- a/krops.nix
+++ b/krops.nix
@@ -40,7 +40,7 @@ in {
     };
   };
   pulsebert = pkgs.krops.writeDeploy "pulsebert" {
-    source = hostSource "pulsebert" "nixos-unstable";
+    source = hostSource "pulsebert" "nixos-20.09";
     target = lib.mkTarget "k-ot@pulsebert.hq.c3d2.de" // {
       sudo = true;
     };