Do no reset the accumulated error after temp change. Lower the coefs

custom_components/versatile_thermostat/const.py

@@ -227,13 +227,23 @@ class RegulationParamLight:
     """ Light parameters for regulation"""
     kp:float = 0.2
     ki:float = 0.05
+    k_ext:float = 0.05
+    offset_max:float = 1.5
+    stabilization_threshold:float = 0.1
+    accumulated_error_threshold:float = 10
+
+
+class RegulationParamMedium:
+    """ Light parameters for regulation"""
+    kp:float = 0.3
+    ki:float = 0.05
     k_ext:float = 0.1
     offset_max:float = 2
     stabilization_threshold:float = 0.1
     accumulated_error_threshold:float = 20
 
 
-class RegulationParamMedium:
+class RegulationParamStrong:
     """ Medium parameters for regulation"""
     kp:float = 0.4
     ki:float = 0.08
@@ -242,7 +252,8 @@ class RegulationParamMedium:
     stabilization_threshold:float = 0.1
     accumulated_error_threshold:float = 25
 
-class RegulationParamStrong:
+# Not used now
+class RegulationParamVeryStrong:
     """ Strong parameters for regulation"""
     kp:float = 0.6
     ki:float = 0.1

custom_components/versatile_thermostat/pi_algorithm.py

@@ -29,7 +29,8 @@ class PITemperatureRegulator:
     def set_target_temp(self, target_temp):
         """ Set the new target_temp"""
         self.target_temp = target_temp
-        self.accumulated_error = 0
+        # Do not reset the accumulated error
+        # self.accumulated_error = 0
 
     def calculate_regulated_temperature(self, internal_temp: float, external_temp:float): # pylint: disable=unused-argument
         """ Calculate a new target_temp given some temperature"""