diff --git a/custom_components/ble_monitor/ble_parser/kkm.py b/custom_components/ble_monitor/ble_parser/kkm.py
index 1626d306..b39ad0bb 100644
--- a/custom_components/ble_monitor/ble_parser/kkm.py
+++ b/custom_components/ble_monitor/ble_parser/kkm.py
@@ -22,11 +22,8 @@ def parse_kkm(self, data: bytes, mac: str):
             ">BBBHbBBBhhh", data[4:19]
         )
         if frame_type == 0x21 and version == 1:
-            if temp < 0:
-                temperature = -(temp + 128 + temp_frac / 100)
-            else:
-                temperature = temp + temp_frac / 100
-            humidity = humi + humi_frac / 100
+            temperature = temp + temp_frac / 256
+            humidity = humi + humi_frac / 256
             result.update(
                 {
                     "temperature": temperature,
diff --git a/custom_components/ble_monitor/test/test_kkm.py b/custom_components/ble_monitor/test/test_kkm.py
index 70772331..705a0216 100644
--- a/custom_components/ble_monitor/test/test_kkm.py
+++ b/custom_components/ble_monitor/test/test_kkm.py
@@ -6,7 +6,7 @@ class TestKKM:
     """Tests for the KKM parser"""
     def test_kkm_k6(self):
         """Test KKM BLE parser for K6 sensors"""
-        data_string = "043E26020100016CD0060234DD1A0201060303AAFE1216AAFE21010F0E07192A224FFFFCFFEC03EBD3"
+        data_string = "043E26020100016CD0060234DD1A0201060303AAFE1216AAFE2101070e5b16531f95FFFCFFEC03EBD3"
         data = bytes(bytearray.fromhex(data_string))
 
         # pylint: disable=unused-variable
@@ -18,12 +18,36 @@ def test_kkm_k6(self):
         assert sensor_msg["mac"] == "DD340206D06C"
         assert sensor_msg["packet"] == "no packet id"
         assert sensor_msg["data"]
-        assert sensor_msg["temperature"] == 25.42
-        assert sensor_msg["humidity"] == 34.79
+        assert sensor_msg["temperature"] == 22.32421875
+        assert sensor_msg["humidity"] == 31.58203125
         assert sensor_msg["acceleration"] == 1003.2
         assert sensor_msg["acceleration x"] == -4
         assert sensor_msg["acceleration y"] == -20
         assert sensor_msg["acceleration z"] == 1003
-        assert sensor_msg["voltage"] == 3.591
+        assert sensor_msg["voltage"] == 3.675
+        assert sensor_msg["battery"] == 100
+        assert sensor_msg["rssi"] == -45
+
+    def test_kkm_k6_neg_temp(self):
+        """Test KKM BLE parser for K6 sensors with negative temperature"""
+        data_string = "043E26020100016CD0060234DD1A0201060303AAFE1216AAFE2101070e5bffc01f95FFFCFFEC03EBD3"
+        data = bytes(bytearray.fromhex(data_string))
+
+        # pylint: disable=unused-variable
+        ble_parser = BleParser()
+        sensor_msg, tracker_msg = ble_parser.parse_raw_data(data)
+
+        assert sensor_msg["firmware"] == "KKM"
+        assert sensor_msg["type"] == "K6 Sensor Beacon"
+        assert sensor_msg["mac"] == "DD340206D06C"
+        assert sensor_msg["packet"] == "no packet id"
+        assert sensor_msg["data"]
+        assert sensor_msg["temperature"] == -0.25
+        assert sensor_msg["humidity"] == 31.58203125
+        assert sensor_msg["acceleration"] == 1003.2
+        assert sensor_msg["acceleration x"] == -4
+        assert sensor_msg["acceleration y"] == -20
+        assert sensor_msg["acceleration z"] == 1003
+        assert sensor_msg["voltage"] == 3.675
         assert sensor_msg["battery"] == 100
         assert sensor_msg["rssi"] == -45