Strange spikes in thermostat set temperature

[glitter-ball]

Bug description Set room temperature from thermostat has weird spikes in it (see screenshot below). Some of these are linked to hot water firing - the pairs of spikes around 06:45, 08:45, 18:00, 20:54. Seems to generate two spikes - one when hot water heating starts and one when it stops. But, this doesn't explain spikes at 02:58 and 14:10 when hot water was not active. Nothing obvious in HA Logbook or History. But... Current Mode (derived from ems-esp/thermostat_data1/mode) keeps blipping from Auto to Manual about every 10 minutes (see screenshot below). Weirdness!.. Don't remember this with 1.9.5...

Steps to reproduce Open set room temperature graph in HA, based on ems-esp/thermostat_data1/seltemp. Graph has weird temperature spikes at 63.5, 63, 55.5, 55 deg C - see screen shot.

Expected behavior Graph to show typical set temperatures. In my case, 5 deg C overnight and when heating off. 18 or 18.5 C when heating on, without the spikes!

Screenshots

Current Mode 00:00 to 03:00

Device information

ems-esp:/$ show
EMS-ESP version 2.0.1b4

Boiler: Worcester Logamax Plus/GB192/Condens GC9000 (DeviceID:0x08 ProductID:208, Version:01.01)
  Hot tap water: off
  Central heating: off
  Warm Water activated: on
  Warm Water charging type: 3-way valve
  Warm Water circulation pump available: off
  Warm Water circulation pump freq: 0x3min
  Warm Water circulation active: off
  Warm Water comfort setting: Hot
  Warm Water disinfection temperature: 70°C
  Warm Water selected temperature: 60°C
  Warm Water set temperature: 60°C
  Warm Water current temperature (intern): 61.6°C
  Warm Water current temperature (extern): 61.6°C
  Warm water storage temperature (extern): 61.6°C
  Warm Water current tap water flow: 0.0l/min
  Warm Water # starts: 3445
  Warm Water active time: 25 days 2 hours 34 minutes
  Warm Water charging: on
  Warm Water disinfecting: off
  Selected flow temperature: 5°C
  Current flow temperature: 62.9°C
  Gas: off
  Boiler pump: off
  Fan: off
  Ignition: off
  Burner selected max power: 0%
  Burner current power: 0%
  Flame current: 0.0uA
  System service code:  (203)
  Heating temperature setting on the boiler: 75°C
  Boiler circuit pump modulation max power: 100%
  Boiler circuit pump modulation min power: 60%
  Boiler circuit pump delay time: 3min
  Boiler temp hysteresis on: -6°C
  Boiler temp hysteresis off: 4°C
  Boiler burner min period: 10min
  Boiler burner min power: 0%
  Boiler burner max power: 100%
  Outside temperature: 15.6°C
  Pump modulation: 0%
  Burner # starts: 12531
  Total burner operating time: 105 days 9 hours 34 minutes
  Total heat operating time: 80 days 7 hours 0 minutes
  Total UBA working time: 808 days 6 hours 16 minutes

Thermostat: RC300/RC310/Moduline 3000/CW400/Sense II (DeviceID:0x10, ProductID:158, Version:33.03)
  Clock: 21:12:46 10/09/2020
  Heating Circuit 1:
    Current room temperature: 21.2°C
    Setpoint room temperature: 18.5°C
    Mode: auto
    Mode Type: comfort
    Program is set to Summer mode
    Day temperature: 21.0°C
    Night temperature: 15.0°C
    Target flow temperature: 0°C

Dallas temperature sensors:
  ID: 28-BE2A-7791-0402-65, Temperature: 51.5°C

ems-esp:/$

Additional context HA definition:

- platform: mqtt
  state_topic: 'ems-esp/thermostat_data1'
  name: 'Set Temperature'
  unit_of_measurement: '°C'
  icon: 'mdi:car-cruise-control'
  value_template: "{{ value_json.seltemp }}" 

[MichaelDvP]

I think that is the same issue we discussed on gitter concerning the mixer valve. Check if it is fixed in the the latest dev.

[MichaelDvP]

@glitter-ball have you seen these spikes again, or is it fixed?

[glitter-ball]

They are still there but, to confirm, I am still on 2.0.1b4. Do I need to upgrade? If so, can I do this from the GUI? I have values in the OTA Settings page but not sure how it works.

[glitter-ball]

I am also seeing duff data in my Dallas sensor in HA - spikes at -26240

This may or may not be related.

[glitter-ball]

I think I've upgraded - but not sure *8(.

I downloaded the ESP8266 .bin file from latest release assets and dragged and dropped that onto the firmware upgrade page in the GUI. It showed 100% upload immediately and that was that. Waited it a bit and then restarted from telnet and the GUI now shows 2.0.1 instead of 2.0.1b4. So guessing it has changed the FW.

I'll see what happens with the setpoint spikes. In case it's relevant, I have boiler, thermostat, other modules and sensors set to MQTT publish on change (i.e. '0' instead of the '10' previously). I also have NTP enabled.

[glitter-ball]

OK. I think it is fixed. I re-flashed around 14:00 today. Prior to that you can see heating target temperature (olive) spikes every time boiler setpoint (blue) changes for hot water. At the last hot water re-heat, this didn't happen. I'll raise a separate issue for the large negative spikes on the Dallas sensor.

[MichaelDvP]

I think I've upgraded - but not sure *8(.

That's right, proddy has released the 2.0.1 today, there is also a identical 2.0.2b0 for download. Than i close this an you describe the dallas issue in a new issue.