Eben noch mal das Thema override direkt am Thermostat versucht - hier mal ein Debug von mir, hoffe es hilft dir so weiter
heatingcontrol.0 2020-04-11 09:07:00.591 info (31476) set thermostat hm-rpc.2.000A1709A64373.1.SET_POINT_TEMPERATURE to 19; current is 18.5
heatingcontrol.0 2020-04-11 09:07:00.273 info (31476) set thermostat hm-rpc.2.000A1709A64260.1.SET_POINT_TEMPERATURE to 20; current is 19
heatingcontrol.0 2020-04-11 09:07:00.200 warn (31476) override temperature not valid: 0
heatingcontrol.0 2020-04-11 09:07:00.155 info (31476) change temperature override for room Wohnzimmer
heatingcontrol.0 2020-04-11 09:07:00.143 info (31476) ### Rooms.Wohnzimmer.TemperaturOverride
heatingcontrol.0 2020-04-11 09:07:00.061 info (31476) Stop Temperatur Override Wohnzimmer
heatingcontrol.0 2020-04-11 09:05:27.853 info (31476) set thermostat hm-rpc.2.000A1709A64373.1.SET_POINT_TEMPERATURE to 18; current is 19.5
heatingcontrol.0 2020-04-11 09:05:27.847 info (31476) room Wohnzimmer Thermostat Wohnzimmer 1.SET_POINT_TEMPERATURE set to 18
heatingcontrol.0 2020-04-11 09:05:27.781 info (31476) change temperature override for room Wohnzimmer
heatingcontrol.0 2020-04-11 09:05:09.025 info (31476) set thermostat hm-rpc.2.000A1709A646C1.1.SET_POINT_TEMPERATURE to 18; current is 19.5
heatingcontrol.0 2020-04-11 09:05:09.019 info (31476) room Flur Thermostat Flur 1.SET_POINT_TEMPERATURE set to 18
heatingcontrol.0 2020-04-11 09:05:08.954 info (31476) change temperature override for room Flur
heatingcontrol.0 2020-04-11 09:00:41.497 warn (31476) override temperature not valid: 0
heatingcontrol.0 2020-04-11 09:00:41.492 info (31476) change temperature override for room Wohnzimmer
heatingcontrol.0 2020-04-11 09:00:41.485 warn (31476) override temperature not valid: 0
heatingcontrol.0 2020-04-11 09:00:41.479 info (31476) change temperature override for room Wohnzimmer
heatingcontrol.0 2020-04-11 09:00:32.681 warn (31476) override temperature not valid: 0
heatingcontrol.0 2020-04-11 09:00:32.673 info (31476) change temperature override for room Flur
heatingcontrol.0 2020-04-11 08:59:59.480 info (31476) set thermostat hm-rpc.2.000A1709A646C1.1.SET_POINT_TEMPERATURE to 19; current is 17
heatingcontrol.0 2020-04-11 08:59:59.242 info (31476) set thermostat hm-rpc.2.000A1709A64373.1.SET_POINT_TEMPERATURE to 19; current is 17
heatingcontrol.0 2020-04-11 08:59:58.997 info (31476) set thermostat hm-rpc.2.000A1709A64260.1.SET_POINT_TEMPERATURE to 20; current is 17
heatingcontrol.0 2020-04-11 08:59:45.129 info (31476) set thermostat hm-rpc.2.000A1709A646C1.1.SET_POINT_TEMPERATURE to 17; current is 19
heatingcontrol.0 2020-04-11 08:59:45.122 info (31476) setting to reduced/increased temperature in Flur to 17
heatingcontrol.0 2020-04-11 08:59:44.893 info (31476) set thermostat hm-rpc.2.000A1709A64373.1.SET_POINT_TEMPERATURE to 17; current is 19
heatingcontrol.0 2020-04-11 08:59:44.885 info (31476) setting to reduced/increased temperature in Wohnzimmer to 17
heatingcontrol.0 2020-04-11 08:59:44.657 info (31476) set thermostat hm-rpc.2.000A1709A64260.1.SET_POINT_TEMPERATURE to 17; current is 20
heatingcontrol.0 2020-04-11 08:59:44.649 info (31476) setting to reduced/increased temperature in Esszimmer to 17
heatingcontrol.0 2020-04-11 08:59:40.412 info (31476) subscribe Wohnzimmer hm-rpc.1.NEQ1483063.1.STATE
heatingcontrol.0 2020-04-11 08:59:40.408 info (31476) subscribe Esszimmer hm-rpc.2.0000D7099A7A99.1.STATE
heatingcontrol.0 2020-04-11 08:59:40.404 info (31476) subscribe radar2.0.Sven._here
heatingcontrol.0 2020-04-11 08:59:40.401 info (31476) subscribe Feiertage.0.heute.boolean
heatingcontrol.0 2020-04-11 08:59:40.097 info (31476) set thermostat hm-rpc.2.000A1709A646C1.1.SET_POINT_TEMPERATURE to 19; current is 18
heatingcontrol.0 2020-04-11 08:59:39.869 info (31476) set thermostat hm-rpc.2.000A1709A64373.1.SET_POINT_TEMPERATURE to 19; current is 17.5
heatingcontrol.0 2020-04-11 08:59:39.640 info (31476) set thermostat hm-rpc.2.000A1709A64260.1.SET_POINT_TEMPERATURE to 20; current is 18
heatingcontrol.0 2020-04-11 08:59:39.520 info (31476) external states checked, done
heatingcontrol.0 2020-04-11 08:59:39.508 info (31476) setting Present to true
heatingcontrol.0 2020-04-11 08:59:39.498 info (31476) checking all external states
heatingcontrol.0 2020-04-11 08:59:37.192 info (31476) starting. Version 0.3.19 in /opt/iobroker/node_modules/iobroker.heatingcontrol, node: v10.16.0
Was mir aufgefallen ist, dass er unter "objekte" den "State" nicht von normal auf override setzt, aber ist vermutlich bekannt und recht kompliziert. Danke für die Mühe