From 6edcafe27c2bfa45a67e2bdd6a71e2d4546e7fe5 Mon Sep 17 00:00:00 2001
From: Nicu Hodos <nicu@hodos.ro>
Date: Fri, 3 Oct 2025 10:24:33 +0200
Subject: [PATCH] adjust battery percent formula: max 3.3V and min 2.7V (the
 minimum voltage required by ATTiny85)

---
 include/devices.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/devices.h b/include/devices.h
index bb2068c..35acd0c 100644
--- a/include/devices.h
+++ b/include/devices.h
@@ -58,7 +58,7 @@ auto presenceTracker = Builder<BinarySensor>::instance(PRESENCE_SENSOR)
         .withParent(gatewayDevice))
     .withValueTemplate("{{ value_json.sensor.state }}")
     .addDiagnostic(new VoltageSensor{PRESENCE_SENSOR, "Battery voltage", "{{ value_json.sensor.diagnostic.voltage }}"})
-    .addDiagnostic(new BatterySensor{PRESENCE_SENSOR, "Battery level", "{{ ((value_json.sensor.diagnostic.voltage|float-2.5)|round(2)*100/2)|int }}"})
+    .addDiagnostic(new BatterySensor{PRESENCE_SENSOR, "Battery level", "{{ ((value_json.sensor.diagnostic.voltage|float-2.7)|round(2)*100/0.6)|int }}"})
     .withOffDelaySeconds(5*60)
     .withDeviceClass("presence")
     .build();