Hi Matt, I searched all my Indigo logs since 2019 and I have had this error 8 times but the frecuency seems to have increased now to about once a month:
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Z:\Library\Application Support\Perceptive Automation\Indigo 7.4\Logs\2020-04-03 Events.txt (2 hits)
Line 1335: 2020-04-03 05:18:46.324 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 1336: 2020-04-03 05:18:46.324 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 7.4\Logs\2020-08-08 Events.txt (2 hits)
Line 6320: 2020-08-08 12:44:50.088 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 6321: 2020-08-08 12:44:50.088 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2021.1\Logs\2021-06-30 Events.txt (2 hits)
Line 12649: 2021-06-30 15:46:11.600 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 12650: 2021-06-30 15:46:11.600 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2021.2\Logs\2022-02-18 Events.txt (2 hits)
Line 7191: 2022-02-18 12:47:50.424 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 7192: 2022-02-18 12:47:50.424 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2021.2\Logs\2022-03-15 Events.txt (2 hits)
Line 2526: 2022-03-15 05:38:40.504 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 2527: 2022-03-15 05:38:40.504 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2021.2\Logs\2022-04-25 Events.txt (2 hits)
Line 1867: 2022-04-25 06:10:05.438 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 1868: 2022-04-25 06:10:05.439 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2022.1\Logs\2022-05-30 Events.txt (2 hits)
Line 19905: 2022-05-30 20:29:03.006 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 19906: 2022-05-30 20:29:03.006 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Z:\Library\Application Support\Perceptive Automation\Indigo 2022.1\Logs\2022-06-16 Events.txt (2 hits)
Line 17485: 2022-06-16 18:48:53.958 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Line 17486: 2022-06-16 18:48:53.958 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
Is it possible that maybe the relay is trying to forward the setpointHeat on behalf of the thermostat? Now here is another weird thing I can't understand. On the 8 times I had this error it is always preceded and succeeded by a Radiator Thermostat sending it's battery status update and it's heat setpoint, here is a sample:
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2022-06-16 18:48:53.940 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-06-16 18:48:53.957 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
2022-06-16 18:48:53.958 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
2022-06-16 18:48:53.958 Error device "Boiler Relay Hot Water" state key setpointHeat not defined (ignoring update request)
2022-06-16 18:48:54.050 Z-Wave received "Radiator Thermostat Living Room" heat setpoint is 21.00 °C
Furthermore the timestamps of the two events are extremely close in all cases, within some miliseconds:
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2020-04-03 05:18:46.323 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2020-04-03 05:18:46.323 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
2020-08-08 12:44:50.085 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2020-08-08 12:44:50.086 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
2021-06-30 15:46:11.363 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 44%
2021-06-30 15:46:11.599 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 21.00 °C
2022-02-18 12:47:50.288 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-02-18 12:47:50.424 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
2022-03-15 05:38:40.462 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-03-15 05:38:40.504 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 31.24 °C
2022-04-25 06:10:05.228 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-04-25 06:10:05.438 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
2022-05-30 20:29:02.988 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-05-30 20:29:03.005 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 31.24 °C
2022-06-16 18:48:53.940 Z-Wave received "024 - Radiator Thermostat Living Room" status update battery level 5%
2022-06-16 18:48:53.957 Z-Wave received "Boiler Relay Hot Water" heat setpoint is 20.96 °C
How is this even possible? It can't be a coincidence that these 8 errors are preceded by another device sending an update within a few miliseconds every time. This Radiator Thermostat Living Room device has nothing to do with the Secure HRT4-ZW Wireless Room Thermostat and is in fact from a different manufacturer (Danfoss Living Connect Radiator Thermostat LC-13). It's also worth noting that on most cases the heat setpoint is 20.96 which doesn't seem to be a random value and it's not even a valid temperature setting on the thermostat which goes by whole degrees (ie no decimals).