From 170d52f5636883ea1268294323a17121b15c83c1 Mon Sep 17 00:00:00 2001
From: GyroGearl00se <bkarttas@gmail.com>
Date: Wed, 19 Feb 2025 02:43:35 +0100
Subject: [PATCH] added check to convert modbus raw_value to a signed integer
 to interpret correctly negativ values (i.e. temperatures)

---
 custom_components/froeling_lambdatronic_modbus/sensor.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/custom_components/froeling_lambdatronic_modbus/sensor.py b/custom_components/froeling_lambdatronic_modbus/sensor.py
index 38a8866..cc2ba94 100644
--- a/custom_components/froeling_lambdatronic_modbus/sensor.py
+++ b/custom_components/froeling_lambdatronic_modbus/sensor.py
@@ -147,6 +147,8 @@ class FroelingSensor(SensorEntity):
                     self._state = None
                 else:
                     raw_value = result.registers[0]
+                    if raw_value > 32767:
+                        raw_value -= 65536
                     scaled_value = raw_value / self._scaling_factor
                     if self._decimal_places == 0:
                         self._state = int(scaled_value)  # Convert to integer if decimal_places is 0