From 08aa0eaf13b790e3622016e751459126ee05bfe7 Mon Sep 17 00:00:00 2001
From: dgreif <dustin.greif@gmail.com>
Date: Sun, 2 Oct 2022 08:12:11 -0700
Subject: [PATCH] fix(homebridge): prevent undefined brightness for alarms

Closes #1057
---
 homebridge/brightness-only.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/homebridge/brightness-only.ts b/homebridge/brightness-only.ts
index d63b6ed4..e1eed729 100644
--- a/homebridge/brightness-only.ts
+++ b/homebridge/brightness-only.ts
@@ -16,13 +16,16 @@ export class BrightnessOnly extends BaseDeviceAccessory {
     const { Characteristic, Service } = hap,
       { context } = accessory
 
-    if ('brightness' in device.data && !isNaN(device.data.brightness!)) {
+    if (
+      device.data.brightness !== undefined &&
+      !isNaN(device.data.brightness)
+    ) {
       this.registerLevelCharacteristic({
         characteristicType: Characteristic.Brightness,
         serviceType: Service.Lightbulb,
         getValue: (data) => {
           if (!data.brightness || isNaN(data.brightness)) {
-            return undefined
+            return 0
           }
 
           // store the brightness so that we can set it again if light is turned off then back on