From 3461ed60990fc91e399ef3c4cd082029db2059dd Mon Sep 17 00:00:00 2001
From: Pieter Vander Vennet <pietervdvn@posteo.net>
Date: Thu, 15 Feb 2024 16:02:22 +0100
Subject: [PATCH] Fix: don't measure compass if alpha is null, fix #1787

---
 src/Sensors/Orientation.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Sensors/Orientation.ts b/src/Sensors/Orientation.ts
index ca71cf2b51..e9d28ffd3f 100644
--- a/src/Sensors/Orientation.ts
+++ b/src/Sensors/Orientation.ts
@@ -77,6 +77,9 @@ export class Orientation {
     }
 
     private update(event: DeviceOrientationEvent) {
+        if(event.alpha === null || event.beta === null || event.gamma === null){
+            return
+        }
         this.gotMeasurement.setData(true)
         // IF the phone is lying flat, then:
         // alpha is the compass direction (but not absolute)