From 7c152cd618756fbcc217c02e4499d83a866f2ec1 Mon Sep 17 00:00:00 2001
From: Robin Bolscher <robinbolscher@gmail.com>
Date: Wed, 22 Jul 2026 14:51:51 +0200
Subject: [PATCH] Add StartUpOnOff and GlobalSceneControl attributes to On/Off
 cluster

Adds the two On/Off cluster (0x0006) attributes missing per ZCL spec r8:
- globalSceneControl (0x4000, bool)
- startUpOnOff (0x4003, enum8) with spec values off/on/toggle/previous
  per Table 3-46, enabling power-on behavior configuration.
---
 index.d.ts            |  2 ++
 lib/clusters/onOff.js | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/index.d.ts b/index.d.ts
index 237c971..90cb7e8 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -226,8 +226,10 @@ declare module "zigbee-clusters" {
   }
   type OnOffClusterAttributes = {
     onOff: { id: 0x00, type: ZCLDataType<boolean> },
+    globalSceneControl: { id: 0x4000, type: ZCLDataType<boolean> },
     onTime: { id: 0x4001, type: ZCLDataType<number> },
     offWaitTime: { id: 0x4002, type: ZCLDataType<number> },
+    startUpOnOff: { id: 0x4003, type: ZCLDataType<"off" | "on" | "toggle" | "previous"> },
   };
   type OnOffClusterCommands = {
     setOff: { id: 0x00, direction: "DIRECTION_SERVER_TO_CLIENT" },
diff --git a/lib/clusters/onOff.js b/lib/clusters/onOff.js
index 3e9bf70..038e2e9 100644
--- a/lib/clusters/onOff.js
+++ b/lib/clusters/onOff.js
@@ -5,8 +5,18 @@ const { ZCLDataTypes } = require('../zclTypes');
 
 const ATTRIBUTES = {
   onOff: { id: 0, type: ZCLDataTypes.bool },
+  globalSceneControl: { id: 16384, type: ZCLDataTypes.bool },
   onTime: { id: 16385, type: ZCLDataTypes.uint16 },
   offWaitTime: { id: 16386, type: ZCLDataTypes.uint16 },
+  startUpOnOff: {
+    id: 16387,
+    type: ZCLDataTypes.enum8({
+      off: 0,
+      on: 1,
+      toggle: 2,
+      previous: 255,
+    }),
+  },
 };
 
 const COMMANDS = {