Fix unit of measurement for resolution, adapt format_measure()

Author: bouwew

plugwise/constants.py

@@ -437,7 +437,7 @@
     # Added measurements from actuator_functionalities/thermostat_functionality
     "lower_bound": {ATTR_UNIT_OF_MEASUREMENT: TEMP_CELSIUS},
     "upper_bound": {ATTR_UNIT_OF_MEASUREMENT: TEMP_CELSIUS},
-    "resolution": {ATTR_UNIT_OF_MEASUREMENT: None},
+    "resolution": {ATTR_UNIT_OF_MEASUREMENT: TEMP_KELVIN},
 }
 
 # Heater Central related measurements

plugwise/util.py

@@ -19,6 +19,7 @@
     PERCENTAGE,
     PLUGWISE_EPOCH,
     TEMP_CELSIUS,
+    TEMP_KELVIN,
     UTF8_DECODE,
     VOLUME_CUBIC_METERS,
 )
@@ -99,7 +100,7 @@ def format_measure(measure: str, unit: str) -> float | int | bool:
     """Format measure to correct type."""
     try:
         measure = int(measure)
-        if unit == TEMP_CELSIUS:
+        if unit in [TEMP_CELSIUS, TEMP_KELVIN]:
             measure = float(measure)
     except ValueError:
         if unit == PERCENTAGE: