diff --git a/hosts/home-assistant/default.nix b/hosts/home-assistant/default.nix
index c9f973f1..ae4ba81a 100644
--- a/hosts/home-assistant/default.nix
+++ b/hosts/home-assistant/default.nix
@@ -39,6 +39,30 @@ in
     home-assistant = {
       enable = true;
       config = {
+        binary_sensor = [
+          {
+            platform = "rest";
+            name = "Turmlabor";
+            unique_id = "status_turmlabor_dresden";
+            resource = "https://turmlabor.de/spaces.api";
+            method = "GET";
+            scan_interval = 60;
+            verify_ssl = true;
+            value_template = "{{ value_json['state']['open'] }}";
+            device_class = "door";
+          }
+          {
+            platform = "rest";
+            name = "c3d2";
+            unique_id = "status_c3d2";
+            resource = "https://c3d2.de/spaceapi.json";
+            method = "GET";
+            scan_interval = 60;
+            verify_ssl = true;
+            value_template = "{{ value_json['state']['open'] }}";
+            device_class = "door";
+          }
+        ];
         default_config = { }; # yes, this is required...
         automation = "!include automations.yaml";
         homeassistant = {