diff --git a/nixos/machines/pepe/prometheus.nix b/nixos/machines/pepe/prometheus.nix
index 34a9b68..8134d25 100644
--- a/nixos/machines/pepe/prometheus.nix
+++ b/nixos/machines/pepe/prometheus.nix
@@ -40,6 +40,21 @@
               }
             ];
           }
+          {
+            name = "home-assistant";
+            rules = [
+              {
+                record = "home_open_window_sum";
+                expr = ''sum( homeassistant_binary_sensor_state{entity=~"binary_sensor\\.window_02_contact|binary_sensor\\.window_03_contact|binary_sensor\\.window_04_contact|binary_sensor\\.window_05_contact|binary_sensor\\.window_06_contact|binary_sensor\\.window_07_contact"} )'';
+              }
+            ] ++ (map
+              (number:
+                {
+                  record = "home_at_least_n_windows_open";
+                  expr = ''home_open_window_sum >= bool ${toString number}'';
+                  labels.n = number;
+                }) [ 1 2 3 ]);
+          }
         ];
       }))
     ];
diff --git a/nixos/machines/pepe/telegraf.nix b/nixos/machines/pepe/telegraf.nix
index f051719..d37352e 100644
--- a/nixos/machines/pepe/telegraf.nix
+++ b/nixos/machines/pepe/telegraf.nix
@@ -31,7 +31,7 @@ in
         systemd_units = { };
         internet_speed.interval = "50m";
         nginx.urls = [ "http://localhost/nginx_status" ];
-        ping = [{ urls = [ "10.100.0.1" ]; }];
+        ping = [{ urls = [ "10.100.0.1" ]; }]; # actually important to make pepe visible over wireguard
       };
     };
   };