fix type variable assignation

pyheatpump/models/variable.py

     def getall_values_of_type_since(type: VariableType, since: int) -> dict:
         floatcast = lambda x: round(float(x) / 10, 2)
         cast_fct = floatcast if type.slabel == 'A' else lambda x: x
-        type.__dict__.update({'since': since})
+        params = type.__dict__.copy()
+        params.update({'since': since})
 
         return {
             row['address']: cast_fct(row['value'])
                 AND var.address >= :start_address
                 AND var.address <= :end_address
                 AND var.last_update > :since""",
-            type.__dict__)
+            params)
 
             if row['address'] and row['value']
         }

pyheatpump/models/variable_value.py

             pass
 
         try:
+            params = self.__dict__.copy()
+            params.update({'type': str(params['type'])})
             DB.sql(
                 """INSERT INTO var_value
                 (type, address, value)
                 VALUES
                 (:type, :address, :value)""",
-                self.__dict__
+                params
             )
             return True
         except Exception as e:
                 AND time <= :time
             ORDER BY time DESC
             LIMIT 1""", {
-                'type':type, 'address':address, 'time':int(time.strftime('%s'))+1
+                'type':str(type), 'address':address, 'time':int(time.strftime('%s'))+1
             }))
             return VariableValue(**dict(row))
         except StopIteration as e: