This thermostat integration aims to drastically simplify your automations around climate management. Because all classical events in climate are natively handled by the thermostat (nobody at home ?, activity detected in a room ?, window open ?, power shedding ?), you don't have to build over complicated scripts and automations to manage your climates ;-).

Component developed by using the amazing development template [blueprint].

This custom component for Home Assistant is an upgrade and is a complete rewrite of the component "Awesome thermostat" (see Github) with addition of features.

When to use / not use

This thermostat aims to command a heater which works only in on/off mode. The minimal needed configuration to use this thermostat is:

1. an equipement like a heater (a switch),
2. a temperature sensor for the room (or an input_number),
3. an external temperature sensor (think of the meteo integration if you don't have one)

Because this integration aims to command the heater considering the preset configured and the room temperature, those informations are mandatory.

Why another thermostat implementation ?

For my personnal usage, I needed to add a couple of features and also to update the behavior that implemented in the previous component "Awesome thermostat". This component named Versatile thermostat manage the following use cases :

• Configuration through standard integration GUI (using Config Entry flow),
• Full uses of presets mode,
• Unset the preset mode when the temperature is manually defined on a thermostat,
• Turn off/on a thermostat when a door or windows is opened/closed after a certain delay,
• Change preset when an activity is detected or not in a room for a defined time,
• Use a TPI (Time Proportional Interval) algorithm thank's to [Argonaute] algorithm ,
• Add power shedding management or regulation to avoid exceeding a defined total power. When max power is exceeded, a hidden 'power' preset is set on the climate entity. When power goes below the max, the previous preset is restored.
• Add home presence management. This feature allows you to dynamically change the temperature of preset considering a occupancy sensor of your home.
• Add services to interact with the thermostat from others integration: you can force the presence / un-presence using a service, and you can dynamically change the temperature of the presets.

How to install this incredible Versatile Thermostat ?

HACS installation (recommended)

1. Install HACS. That way you get updates automatically.
2. Add this Github repository as custom repository in HACS settings.
3. search and install "Versatile Thermostat" in HACS and click install.
4. Restart Home Assistant,
5. Then you can add an Versatile Thermostat integration in the integration page. You add as many Versatile Thermostat that you need (typically one per heater that should be managed)

Manual installation

1. Using the tool of choice open the directory (folder) for your HA configuration (where you find configuration.yaml).
2. If you do not have a custom_components directory (folder) there, you need to create it.
3. In the custom_components directory (folder) create a new folder called versatile_thermostat.
4. Download all the files from the custom_components/versatile_thermostat/ directory (folder) in this repository.
5. Place the files you downloaded in the new directory (folder) you created.
6. Restart Home Assistant
7. Configure new Versatile Thermostat integration

Configuration

Note: no configuration in configuration.yaml is needed because all configuration is done through the standard GUI when adding the integration.

Click on Add integration button in the integration page

The configuration can be change through the same interface. Simply select the thermostat to change, hit "Configure" and you will be able to change some parameters or configuration. Don't forget to reload (dot menu / reload) to take the new configuration into account.

Then follow the configurations steps as follow:

Minimal configuration update

Give the main mandatory attributes:

1. a name (will be the integration name and also the climate entity name)
2. an equipment entity id which represent the heater. This equipment should be able to switch on or off,
3. a temporature sensor entity id which gives the temperature of the room in which the heater is installed,
4. a temperature sensor entity giving the external temperature. If don't have any external sensor, you can use the local meteo integration
5. a cycle duration in minutes. At each cycle, the heater will be turned on then off for a calculated period in order to reach the targeted temperature (see preset below),
6. Algorithm to use. Today only the TPI algorithm is available. See algorithm

Notes 1. Calculation are done at each cycle. So in case of conditions change, you will have to wait for the next cycle to see a change. For this reason, the cycle should not be too long. 5 min is a good value, 2. if the cycle is too short, the heater could never reach the target temperature indeed for heater with accumulation features and it will be unnecessary solicited

Configure the TPI algorithm coefficients

Click on 'Validate' on the previous page and you will get there:

For more informations on the TPI algorithm and tuned please refer to algorithm.

Configure the preset temperature

Click on 'Validate' on the previous page and you will get there:

The preset mode allows you to pre-configurate targeted temperature. Used in conjonction with Scheduler (see scheduler you will have a powerfull and simple way to optimize the temperature vs electrical consumption of your hous. Preset handled are the following :

• Eco : device is running an energy-saving mode
• Comfort : device is in comfort mode
• Boost : device turn all valve full up

None is always added in the list of modes, as it is a way to not use the presets modes but a manual temperature instead.

Notes 1. Changing manually the target temperature, set the preset to None (no preset). This way you can always set a target temperature even if no preset are available. 2. standard Away preset is a hidden preset which is not directly selectable. Versatile Thermostat uses the presence management or movement management to set automatically and dynamically the target temperature depending on a presence in the home or an activity in the room. See presence management. 3. if you uses the power shedding management, you will see a hidden preset named power. The heater preset is set to power when overpowering conditions are encountered and shedding is active for this heater. See power management. 4. If you don't want to use the preseet, give 0 as temperature. The preset will then been ignored and will not displayed in the front component

Configure the doors/windows turning on/off the thermostats

Click on 'Validate' on the previous page and you will get there:

Give the following attributes:

1. an entity id of a window/door sensor. This should be a binary_sensor or a input_boolean. The state of the entity should be 'on' when the window is open or 'off' when closed
2. a delay in seconds before any change. This allow to quickly open a window without stopping the heater.

And that's it ! your thermostat will turn off when the windows is open and be turned back on when it's closed afer the delay.

Notes 1. If you want to use several door/windows sensors to automatize your thermostat, just create a group with the regular behavior (https://www.home-assistant.io/integrations/binary_sensor.group/) 2. If you don't have any window/door sensor in your room, just leave the sensor entity id empty

Configure the activity mode or motion detection

Click on 'Validate' on the previous page and you will get there:

We will now see how to configure the new Activity mode. What we need:

• a motion sensor. The entity id of a motion sensor. Motion sensor states should be 'on' (motion detected) or 'off' (no motion detected)
• a motion delay (in seconds) duration defining how long we wait for motion confirmation before considering the motion
• a target "motion" preset. We will used the temperature of this preset when an activity is detected.
• a target "no motion" preset. We will used the temperature of this second preset when no activity is detected.

So imagine we want to have the following behavior :

• we have room with a thermostat set in activity mode, the "motion" mode chosen is comfort (21.5C), the "no motion" mode chosen is Eco (18.5 C) and the motion delay is 5 min.
• the room is empty for a while (no activity detected), the temperature of this room is 18.5 C
• somebody enters into the room, an activity is detected the temperature is set to 21.5 C
• the person leaves the room, after 5 min the temperature is set back to 18.5 C

For this to work, the climate thermostat should be in Activity preset mode.

Notes 1. Be aware that as for the others preset modes, Activity will only be proposed if it's correctly configure. In other words, the 4 configuration keys have to be set if you want to see Activity in home assistant Interface

Configure the power management

Click on 'Validate' on the previous page and you will get there:

This feature allows you to regulate the power consumption of your radiators. Known as shedding, this feature allows you to limit the electrical power consumption of your heater if overpowering conditions are detected. Give a sensor to the current power consumption of your house, a sensor to the max power that should not be exceeded, the power consumption of your heater and the algorithm will not start a radiator if the max power will be exceeded after radiator starts.

Note that all power values should have the same units (kW or W for example). This allows you to change the max power along time using a Scheduler or whatever you like.

Notes 1. When shedding is encountered, the heater is set to the preset named power. This is a hidden preset, you cannot select it manually. 2. I use this to avoid exceeded the limit of my electrical power contract when an electrical vehicle is charging. This makes a kind of auto-regulation. 3. Always keep a margin, because max power can be briefly exceeded while waiting for the next cycle calculation typically or by not regulated equipement. 4. If you don't want to use this feature, just leave the entities id empty

Configure the presence or occupancy

This feature allows you to dynamically changes the temperature of all configured Versatile thermostat's presets when nobody is at home or when someone comes back home. For this, you have to configure the temperature that will be used for each preset when presence is off. When the occupancy sensor turns to off, those tempoeratures will be used. When it turns on again the "normal" temperature configured for the preset is used. See preset management.

For this you need to configure:

1. A occupancy sensor which state should be 'on' or 'home' if someone is present or 'off' or 'not_home' else,
2. The temperature used in Eco preset when absent,
3. The temperature used in Comfort preset when absent,
4. The temperature used in Boost preset when absent

Notes 1. the switch of temperature is immediate and is reflected on the front component. The calculation will take the new target temperature into account at the next cycle calculation, 2. you can use direct person.xxxx sensor or group of sensors of Home Assistant. The presence sensor handles on or home states as present and off or not_home state as absent.

Algorithm

This integration uses a proportional algorithm. A Proportional algorithm is useful to avoid the oscillation around the target temperature. This algorithm is based on a cycle which alternate heating and stop heating. The proportion of heating vs not heating is determined by the difference between the temperature and the target temperature. Bigger the difference is and bigger is the proportion of heating inside the cycle.

This algorithm make the temperature converge and stop oscillating.

TPI algorithm

The TPI algorithm consist in the calculation at each cycle of a percentage of On state vs Off state for the heater using the target temperature, the current temperature in the room and the current external temperature.

The percentage is calculated with this formula:

on_percent = coef_int * (target temperature - current temperature) + coef_ext * (target temperature - external temperature)
Then make 0 <= on_percent <= 1

Defaults values for coef_int and coef_ext are respectively: 0.6 and 0.01. Those defaults values are suitable for a standard well isolated room.

To tune those coefficients keep in mind that:

1. if target temperature is not reach after stable situation, you have to augment the coef_ext (the on_percent is too high),
2. if target temperature is exceeded after stable situation, you have to decrease the coef_ext (the on_percent is too low),
3. if reaching the target temperature is too slow, you can increase the coef_int to give more power to the heater,
4. if reaching the target temperature is too fast and some oscillations appears around the target, you can decrease the coef_int to give less power to the heater

See some situations at examples.

Custom attributes

To tune the algorithm you have access to all context seen and calculted by the thermostat through dedicated attributes. You can see (and use) those attributes in the "Development tools / states" HMI of HA. Enter your thermostat and you will see something like this:

Custom attributes are the following:

Attribute	Meaning
hvac_modes	The list of modes supported by the thermostat
min_temp	The minimal temperature
max_temp	The maximal temperature
preset_modes	The presets visible for this thermostat. Hidden presets are not showed here
current_temperature	The current temperature as reported by the sensor
temperature	The target temperature
hvac_action	The action currently running by the heater. Can be idle, heating
preset_mode	The currently selected preset. Can be one of the 'preset_modes' or a hidden preset like power
[eco/comfort/boost]_temp	The temperature configured for the preset xxx
[eco/comfort/boost]_away_temp	The temperature configured for the preset xxx when presence is off or not_home
power_temp	The temperature used when shedding is detected
on_percent	The percentage on calculated by the TPI algorithm
on_time_sec	The On period in sec. Should be on_percent * cycle_min
off_time_sec	The Off period in sec. Should be (1 - on_percent) * cycle_min
cycle_min	The calculation cycle in minutes
function	The algorithm used for cycle calculation
tpi_coef_int	The coef_int of the TPI algorithm
tpi_coef_ext	The coef_ext of the TPI algorithm
saved_preset_mode	The last preset used before automatic switch of the preset
saved_target_temp	The last temperature used before automatic switching
window_state	The last known state of the window sensor. None if window is not configured
motion_state	The last known state of the motion sensor. None if motion is not configured
overpowering_state	The last known state of the overpowering sensor. None if power management is not configured
presence_state	The last known state of the presence sensor. None if presence management is not configured
last_update_datetime	The date and time in ISO8866 format of this state
friendly_name	The name of the thermostat
supported_features	A combination of all features supported by this thermostat. See official climate integration documentation for more informations

Some results

Convergence of temperature to target configured by preset:

Cycle of on/off calculated by the integration:

Coef_int too high (oscillations around the target)

Algorithm calculation evolution

Enjoy !

Even Better with Scheduler Component !

In order to enjoy the full power of Versatile Thermostat, I invite you to use it with https://github.com/nielsfaber/scheduler-component Indeed, the scheduler component porpose a management of the climate base on the preset modes. This feature has limited interest with the generic thermostat but it becomes highly powerfull with Awesome thermostat :

Starting here, I assume you have installed Awesome Thermostat and Scheduler Component.

In Scheduler, add a schedule :

Choose "climate" group, choose one (or multiple) entity/ies, select "MAKE SCHEME" and click next : (it is possible to choose "SET PRESET", but I prefer to use "MAKE SCHEME")

Set your mode scheme and save :

In this example I set ECO mode during the night and the day when nobody's at home BOOST in the morning and COMFORT in the evening.

I hope this example helps you, don't hesitate to give me your feedbacks !

Even-even better with custom:simple-thermostat front integration

The custom:simple-thermostat here is a great integration which allow some customisation which fits well with this thermostat. You can have something like that very easily Example configuration:

      type: custom:simple-thermostat
      entity: climate.thermostat_sam2
      layout:
        step: row
      label:
        temperature: T°
        state: Etat
      hide:
        state: false
      control:
        hvac:
          _name: Mode
        preset:
          _name: Preset
      sensors:
        - entity: sensor.total_puissance_radiateur_sam2
          icon: mdi:lightning-bolt-outline
      header:
        toggle:
          entity: input_boolean.etat_ouverture_porte_sam
          name: Porte sam

Even-Even-Even better with Apex-chart to tune your Thermostat

You can get curve like presented in some results with kind of Apex-chart configuration only using the custom attributes of the thermostat described here:

type: custom:apexcharts-card
header:
  show: true
  title: Tuning chauffage
  show_states: true
  colorize_states: true
update_interval: 60sec
graph_span: 4h
yaxis:
  - id: left
    show: true
    decimals: 2
  - id: right
    decimals: 2
    show: true
    opposite: true
series:
  - entity: climate.thermostat_mythermostat
    attribute: temperature
    type: line
    name: Target temp
    curve: smooth
    yaxis_id: left
  - entity: climate.thermostat_mythermostat
    attribute: current_temperature
    name: Current temp
    curve: smooth
    yaxis_id: left
  - entity: climate.thermostat_mythermostat
    attribute: on_percent
    name: Power percent
    curve: stepline
    yaxis_id: right

Contributions are welcome!

If you want to contribute to this please read the Contribution guidelines

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