diff --git a/interface/package.json b/interface/package.json
index b16be7939..705c2fd7a 100644
--- a/interface/package.json
+++ b/interface/package.json
@@ -31,7 +31,7 @@
     "@table-library/react-table-library": "4.1.7",
     "@types/imagemin": "^8.0.5",
     "@types/lodash-es": "^4.17.12",
-    "@types/node": "^20.11.17",
+    "@types/node": "^20.11.19",
     "@types/react": "^18.2.55",
     "@types/react-dom": "^18.2.19",
     "@types/react-router-dom": "^5.3.3",
@@ -66,11 +66,11 @@
     "eslint-plugin-prettier": "alpha",
     "eslint-plugin-react": "^7.33.2",
     "eslint-plugin-react-hooks": "^4.6.0",
-    "preact": "^10.19.4",
+    "preact": "^10.19.5",
     "prettier": "^3.2.5",
     "rollup-plugin-visualizer": "^5.12.0",
-    "terser": "^5.27.0",
-    "vite": "^5.1.2",
+    "terser": "^5.27.1",
+    "vite": "^5.1.3",
     "vite-plugin-imagemin": "^0.6.1",
     "vite-tsconfig-paths": "^4.3.1"
   },
diff --git a/interface/yarn.lock b/interface/yarn.lock
index ee2137def..b7dda30db 100644
--- a/interface/yarn.lock
+++ b/interface/yarn.lock
@@ -1590,12 +1590,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node@npm:^20.11.17":
-  version: 20.11.17
-  resolution: "@types/node@npm:20.11.17"
+"@types/node@npm:^20.11.19":
+  version: 20.11.19
+  resolution: "@types/node@npm:20.11.19"
   dependencies:
     undici-types: "npm:~5.26.4"
-  checksum: 10/3342df87258d1c56154bcd4b85180f48675427b235971e6e6e2e037353f5a2ae9aaa05ba5df0fe1e2d2f1022c8d856fd39056b9d7f50ea30c0ca3214137cae1d
+  checksum: 10/c7f4705d6c84aa21679ad180c33c13ca9567f650e66e14bcee77c7c43d14619c7cd3b4d7b2458947143030b7b1930180efa6d12d999b45366abff9fed7a17472
   languageName: node
   linkType: hard
 
@@ -1858,7 +1858,7 @@ __metadata:
     "@table-library/react-table-library": "npm:4.1.7"
     "@types/imagemin": "npm:^8.0.5"
     "@types/lodash-es": "npm:^4.17.12"
-    "@types/node": "npm:^20.11.17"
+    "@types/node": "npm:^20.11.19"
     "@types/react": "npm:^18.2.55"
     "@types/react-dom": "npm:^18.2.19"
     "@types/react-router-dom": "npm:^5.3.3"
@@ -1880,7 +1880,7 @@ __metadata:
     jwt-decode: "npm:^4.0.0"
     lodash-es: "npm:^4.17.21"
     mime-types: "npm:^2.1.35"
-    preact: "npm:^10.19.4"
+    preact: "npm:^10.19.5"
     prettier: "npm:^3.2.5"
     react: "npm:latest"
     react-dom: "npm:latest"
@@ -1890,10 +1890,10 @@ __metadata:
     react-toastify: "npm:^10.0.4"
     rollup-plugin-visualizer: "npm:^5.12.0"
     sockette: "npm:^2.0.6"
-    terser: "npm:^5.27.0"
+    terser: "npm:^5.27.1"
     typesafe-i18n: "npm:^5.26.2"
     typescript: "npm:^5.3.3"
-    vite: "npm:^5.1.2"
+    vite: "npm:^5.1.3"
     vite-plugin-imagemin: "npm:^0.6.1"
     vite-tsconfig-paths: "npm:^4.3.1"
   languageName: unknown
@@ -7021,10 +7021,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"preact@npm:^10.19.4":
-  version: 10.19.4
-  resolution: "preact@npm:10.19.4"
-  checksum: 10/e79051c08d61c6723a4535606c9136ea752f8bae984ae8056039e2a56f6d58d6200aa941850478dc822dca38c16469d23368e9f75d7a7e57f9ca4df70a305d0f
+"preact@npm:^10.19.5":
+  version: 10.19.5
+  resolution: "preact@npm:10.19.5"
+  checksum: 10/9c4c716361d7793f6c8ae475db7bbed7ef4affd4ac8eaf6ff9afd8d1218a0ae55918635b5d8842a3c8eecd22728e24f0af681c710d0ada6d81424dd991665cde
   languageName: node
   linkType: hard
 
@@ -8312,9 +8312,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"terser@npm:^5.27.0":
-  version: 5.27.0
-  resolution: "terser@npm:5.27.0"
+"terser@npm:^5.27.1":
+  version: 5.27.1
+  resolution: "terser@npm:5.27.1"
   dependencies:
     "@jridgewell/source-map": "npm:^0.3.3"
     acorn: "npm:^8.8.2"
@@ -8322,7 +8322,7 @@ __metadata:
     source-map-support: "npm:~0.5.20"
   bin:
     terser: bin/terser
-  checksum: 10/9b2c5cb00747dea5994034ca064fb3cc7efc1be6b79a35247662d51ab43bdbe9cbf002bbf29170b5f3bd068c811d0212e22d94acd2cf0d8562687b96f1bffc9f
+  checksum: 10/4b5c8c65548071ae09dc1d9fd64616262876229897eaac9f95cf2e44908a1f4a25d7837c2a38caef1a523cf1cf67d254e74a846e9a854d289c0ad3664d581c3c
   languageName: node
   linkType: hard
 
@@ -8738,9 +8738,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"vite@npm:^5.1.2":
-  version: 5.1.2
-  resolution: "vite@npm:5.1.2"
+"vite@npm:^5.1.3":
+  version: 5.1.3
+  resolution: "vite@npm:5.1.3"
   dependencies:
     esbuild: "npm:^0.19.3"
     fsevents: "npm:~2.3.3"
@@ -8774,7 +8774,7 @@ __metadata:
       optional: true
   bin:
     vite: bin/vite.js
-  checksum: 10/fbfc5a84ee33c01cd2c3109ba08c2f3822df9a85bee79179ba5a812757f895e2da234208881b9943291d48b0a4ef8fb90ffaa790d89888530a2ad6c70c169e12
+  checksum: 10/6ba2223157e2cc2fa62dff9004ccba20fc409c6baf7354c64ed0f8e4bcd853092d08d06ec4dec37143e794a96e061879a870d85bad4f1eb9ee5c6d0a13cef30f
   languageName: node
   linkType: hard
 
diff --git a/src/roomcontrol.h b/src/roomcontrol.h
index 443dfa371..5010a9b17 100644
--- a/src/roomcontrol.h
+++ b/src/roomcontrol.h
@@ -35,7 +35,7 @@ class Roomctrl {
 
   private:
     static constexpr uint8_t  ADDR          = 0x18;  // address for hc1
-    static constexpr uint32_t SEND_INTERVAL = 60000; // 1 minute
+    static constexpr uint32_t SEND_INTERVAL = 30000; // 1/2 minute
     static constexpr uint8_t  HCS           = 4;     // max 4 heating circuits
 
     static uint8_t get_hc(const uint8_t addr);