From d891e64f7a7ff17c20fcf8b0e9d2fdf58fdd6a7e Mon Sep 17 00:00:00 2001
From: Dominic Griesel <d.griesel@gmx.net>
Date: Mon, 18 Nov 2019 20:23:34 +0100
Subject: [PATCH] fix: don't create batteryPercentage if a device has no
 battery status

---
 src/lib/iobroker-objects.ts | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/lib/iobroker-objects.ts b/src/lib/iobroker-objects.ts
index dbb1c88c..0b9b9e8b 100644
--- a/src/lib/iobroker-objects.ts
+++ b/src/lib/iobroker-objects.ts
@@ -253,10 +253,13 @@ export async function extendDevice(accessory: Accessory) {
 			accessory.deviceInfo.power === PowerSources.InternalBattery ||
 			accessory.deviceInfo.power === PowerSources.ExternalBattery
 		) {
-			stateObjs.battery = objectDefinitions.batteryPercentage(
-				objId,
-				"device"
-			);
+			if (accessory.deviceInfo.battery != undefined) {
+				// Some 3rd party devices send no battery info
+				stateObjs.battery = objectDefinitions.batteryPercentage(
+					objId,
+					"device"
+				);
+			}
 		}
 
 		if (accessory.type === AccessoryTypes.blind) {