From 9b29f5d2c72737d06b0d6b48505ff01bd69c93ab Mon Sep 17 00:00:00 2001
From: Marco Heiming <myx00r@googlemail.com>
Date: Sat, 1 Jan 2022 14:13:53 +0100
Subject: [PATCH] Improve heart rate circle drawing calculation

---
 apps/circlesclock/app.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/apps/circlesclock/app.js b/apps/circlesclock/app.js
index a23894ba1..026b47cc6 100644
--- a/apps/circlesclock/app.js
+++ b/apps/circlesclock/app.js
@@ -102,7 +102,8 @@ function drawHeartRate() {
   g.fillCircle(w2, h3, radiusOuter);
 
   if (hrtValue != undefined && hrtValue > 0) {
-    const percent = hrtValue / settings.maxHR;
+    const minHR = 40;
+    const percent = (hrtValue - minHR) / (settings.maxHR - minHR);
     drawGauge(w2, h3, percent, colorRed);
   }
 
@@ -166,6 +167,7 @@ function drawGauge(cx, cy, percent, color) {
   var i = 0;
   var r = radiusInner + 3;
 
+  if (percent <= 0) return;
   if (percent > 1) percent = 1;
 
   var startrot = -offset;