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 ;-).

Thanks for the beer buymecoffee
When to use / not use
- Incompatibilities
Why another thermostat implementation ?
How to install this incredible Versatile Thermostat ?
- HACS installation (recommended)
- Manual installation
Configuration
Examples tuning
Algorithm
- TPI algorithm
Sensors
Services
Notifications
Custom attributes
Some results
Even better
Contributions are welcome!

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.

News

Release 3.8: Added a self-regulation function for over climate thermostats whose regulation is done by the underlying climate. See Self-regulation and #129. Added the possibility of inverting the command for an over switch thermostat to address installations with pilot wire and diode #124.

Release 3.7: Addition of the Versatile Thermostat type over valve to control a TRV valve directly or any other dimmer type equipment for heating. Regulation is then done directly by acting on the opening percentage of the underlying entity: 0 the valve is cut off, 100: the valve is fully opened. See #131. Added a function allowing the bypass of opening detection #138. Added Slovak language

Release 3.6: Added the motion_off_delay parameter to improve motion management #116, #128. Added AC (air conditioning) mode for a VTherm over switch. Preparing the Github project to facilitate contributions #127

Release 3.5: Multiple thermostats when using "thermostat over another thermostat" mode #113

Others releases

Release 3.4: bug fixes and expose preset temperatures for AC mode #103

Release 3.3: add the Air Conditionned mode (AC). This feature allow to use the eventual AC mode of your underlying climate entity. You have to check the "Use AC mode" checkbox in configuration and give preset temperature value for AC mode and AC mode when absent if absence is configured

Release 3.2: add the ability to control multiple switches from the same thermostat. In this mode, the switches are triggered with a delay to minimize the power required at one time (we minimize the recovery periods). See Configuration

Release 3.1: added detection of open windows/doors by temperature drop. This new function makes it possible to automatically stop a radiator when the temperature drops suddenly. See Auto mode

Major release 3.0: addition of thermostat equipment and associated sensors (binary and non-binary). Much closer to the Home Assistant philosophy, you now have direct access to the energy consumed by the radiator controlled by the thermostat and many other sensors that will be useful in your automations and dashboard.

release 2.3: addition of the power and energy measurement of the radiator controlled by the thermostat.

release 2.2: addition of a safety function allowing a radiator not to be left heating forever in the event of a thermometer failure

major release 2.0: addition of the "over climate" thermostat allowing you to transform any thermostat into a Versatile Thermostat and add all the functions of the latter.

Thanks for the beer buymecoffee

Many thanks to @salabur, @pvince83, @bergoglio, @EPicLURcher, @ecolorado66, @Kriss1670, @maia, @f.maymil, @moutte69, @Jerome for the beers. It's very nice and encourages me to continue!

When to use / not use

This thermostat can control 3 types of equipment:

a radiator that only operates in on/off mode (called ``thermostat_over_switch```). The minimum configuration necessary to use this type thermostat is:
1. equipment such as a radiator (a ``switch``` or equivalent),
2. a temperature probe for the room (or an input_number),
3. an external temperature sensor (consider weather integration if you don't have one)
another thermostat which has its own operating modes (named ``thermostat_over_climate```). For this type of thermostat the minimum configuration requires:
1. equipment - such as air conditioning, a thermostatic valve - which is controlled by its own ``climate'' type entity,
equipment which can take a value from 0 to 100% (called thermostat_over_valve). At 0 the heating is cut off, 100% it is fully opened. This type allows you to control a thermostatic valve (see Shelly valve) which exposes an entity of type number. allowing you to directly control the opening of the valve. Versatile Thermostat regulates the room temperature by adjusting the opening percentage, using the interior and exterior temperature sensors using the TPI algorithm described below.

The thermostat_over_climate type allows you to add all the functionality provided by VersatileThermostat to your existing equipment. The climate VersatileThermostat entity will control your existing climate entity, turning it off if the windows are open, switching it to Eco mode if no one is present, etc. See here. For this type of thermostat, any heating cycles are controlled by the underlying climate entity and not by the Versatile Thermostat itself. An optional self-regulation function allows the Versatile Thermostat to adjust the temperature given as a setpoint to the underlying in order to reach the setpoint.

Installations with pilot wire and activation diode benefit from an option which allows the on/off control of the underlying radiator to be reversed. To do this, use the over switch type and check the command inversion option.

Incompatibilities

Some TRV type thermostats are known to be incompatible with the Versatile Thermostat. This is the case for the following valves:

Danfoss POPP valves with temperature feedback. It is impossible to turn off this valve and it self-regulates, causing conflicts with the VTherm,
“Homematic radio” thermostatic valves. They have a duty cycle incompatible with control by the Versatile Thermostat

Why another thermostat implementation ?

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 and change dynamically the security parameters.
Add sensors to see the internal states of the thermostat

How to install this incredible Versatile Thermostat ?

HACS installation (recommended)

Install HACS. That way you get updates automatically.
The Versatile Thermostat integration is now offered directly from the HACF interface (integration tab).
search and install "Versatile Thermostat" in HACS and click install.
Restart Home Assistant,
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

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

Then follow the configurations steps as follow:

Minimal configuration update

Give the main mandatory attributes:

a name (will be the name of the integration and also the name of the climate entity)
the thermostat type thermostat_over_switch to control a radiator controlled by a switch or thermostat_over_climate to control another thermostat, or thermostat_over_valve Cf. [above](# why-a-new-thermostat-implementation)
a temperature sensor entity identifier which gives the temperature of the room in which the radiator is installed,
a temperature sensor entity giving the outside temperature. If you don't have an external sensor, you can use local weather integration
a cycle duration in minutes. On each cycle, the heater will cycle on and then off for a calculated time to reach the target temperature (see preset below). In over_climate mode, the cycle is only used to carry out basic controls but does not directly regulate the temperature. It's the underlying climate that does it,
minimum and maximum thermostat temperatures,
the power of the l'équipement which will activate the power and energy sensors of the device,
the list of features that will be used for this thermostat. Depending on your choices, the following configuration screens will appear or not.

Notes

With the thermostat_over_switch type, 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,

if the cycle is too short, the heater could never reach the target temperature. For the storage radiator for example it will be used unnecessarily.

Select the driven entity

Depending on your choice of thermostat type, you will need to choose one or more switch, climate or number type entities. Only entities compatible with the type are presented.

How to choose the type The choice of type is important. Even if it is always possible to modify it afterwards via the configuration HMI, it is preferable to ask yourself the following few questions:

what type of equipment am I going to pilot? In order, here is what to do:

if you have a thermostatic valve (TRV) that can be controlled in Home Assistant via a number type entity (for example a Shelly TRV), choose the over_valve type. It is the most direct type and which ensures the best regulation,

if you have an electric radiator (with or without pilot wire) and a switch type entity allows you to turn it on or off, then the over_switch type is preferable. Regulation will be done by the Versatile Thermostat according to the temperature measured by your thermometer, where you have placed it,

in all other cases, use the over_climate mode. You keep your original climate entity and the Versatile Thermostat "only" controls the on/off and the target temperature of your original thermostat. Regulation is done by your original thermostat in this case. This mode is particularly suitable for all-in-one reversible air conditioning systems whose exposure in Home Assistant is limited to a climate type entity.

what type of regulation do I want? If the controlled equipment has its own regulation mechanism (air conditioning, certain TRV valve) and this regulation works well, opt for an ``over_climate``` It is possible to choose an over switch thermostat which controls air conditioning by checking the "AC Mode" box. In this case, only the cooling mode will be visible.

For a `thermostat_over_switch` type thermostat

The algorithm to use is currently limited to TPI is available. See algorithm. If several type entities are configured, the thermostat shifts the activations in order to minimize the number of switches active at a time t. This allows for better power distribution since each radiator will turn on in turn. Example of synchronized triggering:

It is possible to choose an over switch thermostat which controls air conditioning by checking the "AC Mode" box. In this case, only the cooling mode will be visible.

If your equipment is controlled by a pilot wire with a diode, you will certainly need to check the "Invert Check" box. It allows you to set the switch to On when you need to turn the equipment off and to Off when you need to turn it on.

For a thermostat of type `thermostat_over_climate`:

It is possible to choose an over climate thermostat which controls reversible air conditioning by checking the “AC Mode” box. In this case, depending on the equipment ordered, you will have access to heating and/or cooling.

Self-regulation

Since release 3.8, you have the possibility to activate the self-regulation function. This function allows VersatileThermostat to adapt the temperature setpoint given to the underlying climate so that the room temperature actually reaches the setpoint. To do this, the VersatileThermostat calculates an offset based on the following information:

the current difference between the actual temperature and the set temperature,
the accumulation of past differences,
the difference between the outside temperature and the setpoint

These three pieces of information are combined to calculate the offset which will be added to the current setpoint and sent to the underlying climate.

The self-regulation function is configured with:

a degree of regulation:
1. Light - for low self-regulation needs. In this mode, the maximum offset will be 1.5°,
2. Medium - for average self-regulation. A maximum offset of 2° is possible in this mode,
3. Strong - for a strong need for self-regulation. The maximum offset is 3° in this mode and the auto-regulation will react strongly to temperature changes.
A self-regulation threshold: value below which new regulation will not be applied. Let us imagine that at a time t, the offset is 2°. If in the next calculation, the offset is 2.4°, it will not be applied. It will only be applied that the difference between 2 offsets will be at least equal to this threshold,
Minimum period between 2 self-regulation changes: this number, expressed in minutes, indicates the duration between 2 regulation changes.

These three parameters make it possible to modulate the regulation and avoid multiplying the regulation sendings. Some equipment such as TRVs and boilers do not like the temperature setpoint to be changed too often.

Implementation tip

Do not start self-regulation straight away. Watch how the natural regulation of your equipment works. If you notice that the set temperature is not reached or that it is taking too long to be reached, start the regulation,

First start with a slight self-regulation and keep both parameters at their default values. Wait a few days and check if the situation has improved,

If this is not sufficient, switch to Medium self-regulation, wait for stabilization,

If this is still not sufficient, switch to Strong self-regulation.

Self-regulation consists of forcing the equipment to go further by forcing its set temperature regularly. Its consumption can therefore be increased, as well as its wear.

For a thermostat of type `thermostat_over_valve`:

You can choose up to domain entity number or ìnput_number which will control the valves. The algorithm to use is currently limited to TPI is available. See algorithm.

It is possible to choose an over valve thermostat which controls air conditioning by checking the "AC Mode" box. In this case, only the cooling mode will be visible.

Configure the TPI algorithm coefficients

click on 'Validate' on the previous page, and if you choose a over_switch or over_valve thermostat 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

If AC mode is used, you will also be able to configure temperatures when the equipment is in cooling mode.

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

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.

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.

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.

if you uses the advanced configuration you will see the preset set to security if the temperature could not be retrieved after a certain delay

ff 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

You must have chosen the With opening detection feature on the first page to arrive on this page. The detection of openings can be done in 2 ways:

either with a sensor placed on the opening (sensor mode),
either by detecting a sudden drop in temperature (auto mode)

The sensor mode

In sensor mode, you must fill in the following information:

an entity ID of a window/door sensor. It should be a binary_sensor or an input_boolean. The state of the entity must be 'on' when the window is open or 'off' when it is closed
a delay in seconds before any change. This allows a window to be opened quickly without stopping the heating.

Auto mode

In auto mode, the configuration is as follows:

a detection threshold in degrees per minute. When the temperature drops below this threshold, the thermostat will turn off. The lower this value, the faster the detection will be (in return for a risk of false positives),
an end of detection threshold in degrees per minute. When the temperature drop goes above this value, the thermostat will go back to the previous mode (mode and preset),
maximum detection time. Beyond this time, the thermostat will return to its previous mode and preset even if the temperature continues to drop.

To set the thresholds it is advisable to start with the reference values and adjust the detection thresholds. A few tries gave me the following values (for a desktop):

detection threshold: 0.05°C/min
non-detection threshold: 0 °C/min
maximum duration: 60 min.

A new "slope" sensor has been added for all thermostats. It gives the slope of the temperature curve in °C/min (or °K/min). This slope is smoothed and filtered to avoid aberrant values from the thermometers which would interfere with the measurement.

To properly adjust it is advisable to display on the same historical graph the temperature curve and the slope of the curve (the "slope"):

And that's all ! your thermostat will turn off when the windows are open and turn back on when closed.

Notes

If you want to use multiple door/window sensors to automate your thermostat, just create a group with the usual behavior (https://www.home-assistant.io/integrations/binary_sensor.group/)

If you don't have a window/door sensor in your room, just leave the sensor entity id blank,

Only one mode is allowed. You cannot configure a thermostat with a sensor and automatic detection. The 2 modes may contradict each other, it is not possible to have the 2 modes at the same time,

It is not recommended to use the automatic mode for equipment subject to frequent and normal temperature variations (corridors, open areas, ...)

Configure the activity mode or motion detection

If you choose the Motion management feature, lick 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 end of motion delay (in seconds) duration defining how long we wait for end of motion confirmation before considering the end of 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.
we have a room with a thermostat set to activity mode, the "movement" mode chosen is comfort (21.5°C), the "no movement" mode chosen is Eco (18.5°C) and the movement delay is 30 sec during detection and 5 minutes at the end of detection.
the room has been empty for a while (no activity detected), the temperature of this room is 18.5°
someone enters the room, activity is detected if movement is present for at least 30 seconds. The temperature then rises to 21.5°
if the movement is present for less than 30 seconds (rapid passage), the temperature remains at 18.5°,
imagine that the temperature has risen to 21.5°, when the person leaves the room, after 5 minutes the temperature is reduced to 18.5°.
if the person returns before 5 minutes, the temperature remains at 21.5°

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

Notes

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

If you choose the Power management feature, 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 (in the first step of the configuration) 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

When shedding is encountered, the heater is set to the preset named power. This is a hidden preset, you cannot select it manually.

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.

Always keep a margin, because max power can be briefly exceeded while waiting for the next cycle calculation typically or by not regulated equipement.

If you don't want to use this feature, just leave the entities id empty

Configure the presence or occupancy

If you choose the Presence management feature, 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. To configure presence fills this form:

For this you need to configure:

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

Si le mode AC est utilisé, vous pourrez aussi configurer les températures lorsque l'équipement en mode climatisation.

Notes

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,

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.

Advanced configuration

Those parameters allows to fine tune the thermostat. The advanced configuration form is the following:

The first delay (minimal_activation_delay_sec) in sec in the minimum delay acceptable for turning on the heater. When calculation gives a power on delay below this value, the heater will stays off.

The second delay (security_delay_min) is the maximal delay between two temperature measure before setting the preset to security and turning off the thermostat. If the temperature sensor is no more giving temperature measures, the thermostat and heater will turns off after this delay and the preset of the thermostat will be set to security. This is useful to avoid overheating is the battery of your temperature sensor is too low.

The third parameter (security_min_on_percent) is the minimum value of on_percent below which the security preset will not be activated. This parameter makes it possible not to put a thermostat in safety, if the controlled radiator does not heat sufficiently. Setting this parameter to 0.00 will trigger the security preset regardless of the last heating setpoint, conversely 1.00 will never trigger the security preset (which amounts to disabling the function).

The fourth parameter (security_default_on_percent) is the on_percent value that will be used when the thermostat enters security mode. If you put 0 then the thermostat will be cut off when it goes into security mode, putting 0.2% for example allows you to keep a little heating (20% in this case), even in mode security. It avoids finding your home totally frozen during a thermometer failure.

See example tuning for common tuning examples

Notes

When the temperature sensor comes to life and returns the temperatures, the preset will be restored to its previous value,

Attention, two temperatures are needed: internal temperature and external temperature and each must give the temperature, otherwise the thermostat will be in "security" preset,

A service is available that allows you to set the 3 security parameters. This can be used to adapt the security function to your use.

For natural usage, the security_default_on_percent should be less than security_min_on_percent,

Thermostat of type thermostat_over_climate are not concerned by the security feature.

Parameters synthesis

Paramètre	Libellé	"over switch"	"over climate"	"over valve"
`name`	Name	X	X	X
`thermostat_type`	Thermostat type	X	X	X
`temperature_sensor_entity_id`	Temperature sensor entity id	X	-	X
`external_temperature_sensor_entity_id`	External temperature sensor entity id	X	-	X
`cycle_min`	Cycle duration (minutes)	X	X	X
`temp_min`	Minimal temperature allowed	X	X	X
`temp_max`	Maximal temperature allowed	X	X	X
`device_power`	Device power	X	X	X
`use_window_feature`	Use window detection	X	X	X
`use_motion_feature`	Use motion detection	X	X	X
`use_power_feature`	Use power management	X	X	X
`use_presence_feature`	Use presence detection	X	X	X
`heater_entity1_id`	1rst heater switch	X	-	-
`heater_entity2_id`	2nd heater switch	X	-	-
`heater_entity3_id`	3rd heater switch	X	-	-
`heater_entity4_id`	4th heater switch	X	-	-
`proportional_function`	Algorithm	X	-	X
`climate_entity1_id`	1rst underlying climate	-	X	-
`climate_entity2_id`	2nd underlying climate	-	X	-
`climate_entity3_id`	3rd underlying climate	-	X	-
`climate_entity4_id`	4th underlying climate	-	X	-
`valve_entity1_id`	1rst underlying valve	-	-	X
`valve_entity2_id`	2nd underlying valve	-	-	X
`valve_entity3_id`	3rd underlying valve	-	-	X
`valve_entity4_id`	4th underlying valve	-	-	X
`ac_mode`	Use the Air Conditioning (AC) mode	X	X	X
`tpi_coef_int`	Coefficient to use for internal temperature delta	X	-	X
`tpi_coef_ext`	Coefficient to use for external temperature delta	X	-	X
`eco_temp`	Temperature in Eco preset	X	X	X
`comfort_temp`	Temperature in Comfort preset	X	X	X
`boost_temp`	Temperature in Boost preset	X	X	X
`eco_ac_temp`	Temperature in Eco preset for AC mode	X	X	X
`comfort_ac_temp`	Temperature in Comfort preset for AC mode	X	X	X
`boost_ac_temp`	Temperature in Boost preset for AC mode	X	X	X
`window_sensor_entity_id`	Window sensor entity id	X	X	X
`window_delay`	Window sensor delay (seconds)	X	X	X
`window_auto_open_threshold`	Temperature decrease threshold for automatic window open detection (in °/min)	X	X	X
`window_auto_close_threshold`	Temperature increase threshold for end of automatic detection (in °/min)	X	X	X
`window_auto_max_duration`	Maximum duration of automatic window open detection (in min)	X	X	X
`motion_sensor_entity_id`	Motion sensor entity id	X	X	X
`motion_delay`	Delay before considering the motion (seconds)	X	X	X
`motion_off_delay`	Delay before considering the end of motion (seconds)	X	X	X
`motion_preset`	Preset to use when motion is detected	X	X	X
`no_motion_preset`	Preset to use when no motion is detected	X	X	X
`power_sensor_entity_id`	Power sensor entity id	X	X	X
`max_power_sensor_entity_id`	Max power sensor entity id	X	X	X
`power_temp`	Temperature for Power shedding	X	X	X
`presence_sensor_entity_id`	Presence sensor entity id	X	X	X
`eco_away_temp`	Temperature in Eco preset when no presence	X	X	X
`comfort_away_temp`	Temperature in Comfort preset when no presence	X	X	X
`boost_away_temp`	Temperature in Boost preset when no presence	X	X	X
`eco_ac_away_temp`	Temperature in Eco preset when no presence in AC mode	X	X	X
`comfort_ac_away_temp`	Temperature in Comfort preset when no presence in AC mode	X	X	X
`boost_ac_away_temp`	Temperature in Boost preset when no presence in AC mode	X	X	X
`minimal_activation_delay`	Minimal activation delay	X	-	X
`security_delay_min`	Security delay (in minutes)	X	-	X
`security_min_on_percent`	Minimal power percent to enable security mode	X	-	X
`security_default_on_percent`	Power percent to use in security mode	X	-	X
`auto_regulation_mode`	Le mode d'auto-régulation	-	X	-
`auto_regulation_dtemp`	La seuil d'auto-régulation	-	X	-
`auto_regulation_period_min`	La période minimale d'auto-régulation	-	X	-
`inverse_switch_command`	Inverse the switch command (for pilot wire switch)	X	-	-

Examples tuning

Electrical heater

cycle: between 5 and 10 minutes,
minimal_activation_delay_sec: 30 seconds

Central heating (gaz or fuel heating system)

cycle: between 30 and 60 min,
minimal_activation_delay_sec: 300 seconds (because of the response time)

Temperature sensor will battery

security_delay_min: 60 min (because these sensors are lazy)
security_min_on_percent: 0.5 (50% - we go to the security preset if the radiator was heating more than 50% of the time)
security_default_on_percent: 0.1 (10% - in preset security, we keep a heating background 20% of the time)

These settings should be understood as follows:

If the thermometer no longer sends the temperature for 1 hour and the heating percentage (on_percent) was greater than 50%, then this heating percentage is reduced to 10%.

It's up to you to adapt these settings to your case!

What is important is not to take too many risks with these parameters: suppose you are away for a long period, that the batteries of your thermometer reach the end of their life, your radiator will heat up 10% of the time for the whole the duration of the outage.

Versatile Thermostat allows you to be notified when an event of this type occurs. Set up the alerts that go well as soon as you use this thermostat. See (#notifications)

Reactive temperature sensor (on mains)

security_delay_min: 15min
security_min_on_percent: 0.7 (70% - we go to the security preset if the radiator was heating more than 70% of the time)
security_default_on_percent: 0.25 (25% - in preset security, we keep a heating background 25% of the time)

My preset configuration

This is just an example of how I use the preset. It up to you to adapt to your configuration but it can be useful to understand how it works. Eco: 17 °C Comfort: 19 °C Boost: 20 °C

When presence if off: Eco: 16.5 °C Comfort: 17 °C Boost: 18 °C

Motion detector in my office is set to use Boost when motion is detected and Eco if not.

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. This algorithm is therefore only valid for Versatile Thermostats which regulate: over_switch and over_valve.

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:

if target temperature is not reach after stable situation, you have to augment the coef_ext (the on_percent is too low),
if target temperature is exceeded after stable situation, you have to decrease the coef_ext (the on_percent is too high),
if reaching the target temperature is too slow, you can increase the coef_int to give more power to the heater,
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

In type over_valve the on_percent is reduced to a value between 0 and 100% and is used directly to control the opening of the valve.

See some situations at examples.

Sensors

With the thermostat are available sensors that allow you to view the alerts and the internal status of the thermostat. They are available in the entities of the device associated with the thermostat:

In order, there are:

the main climate thermostat command entity,
the energy consumed by the thermostat (value which continuously increases),
the time of receipt of the last outside temperature,
the time of receipt of the last indoor temperature,
the average power of the device over the cycle (for TPIs only),
the time spent in the off state in the cycle (TPI only),
the time spent in the on state in the cycle (TPI only),
load shedding status,
cycle power percentage (TPI only),
presence status (if presence management is configured),
security status,
opening status (if opening management is configured),
motion status (if motion management is configured),
the valve opening percentage (for the over_valve type)

To color the sensors, add these lines and customize them as needed, in your configuration.yaml:

frontend:
  themes:
    versatile_thermostat_theme:
      state-binary_sensor-safety-on-color: "#FF0B0B"
      state-binary_sensor-power-on-color: "#FF0B0B"
      state-binary_sensor-window-on-color: "rgb(156, 39, 176)"
      state-binary_sensor-motion-on-color: "rgb(156, 39, 176)"
      state-binary_sensor-presence-on-color: "lightgreen"
      state-binary_sensor-running-on-color: "orange"

and choose the versatile_thermostat_theme theme in the panel configuration. You will get something that will look like this:

Services

This custom implementation offers some specific services to facilitate integration with others Home Assisstant components.

Force the presence / occupancy

This service allows you to force the presence status independantly of the presence sensor. This can be useful if you want to manage the presence through a service and not through a sensor. For example, you could use your alarm to force the absence when it is switched on.

The code to call this service is the following:

service: versatile_thermostat.set_presence
data:
    presence: "off"
target:
    entity_id: climate.my_thermostat

Change the temperature of presets

This services is useful if you want to dynamically change the preset temperature. Instead of changing preset, some use-case need to change the temperature of the preset. So you can keep the Scheduler unchanged to manage the preset and adjust the temperature of the preset. If the changed preset is currently selectionned, the modification of the target temperature is immediate and will be taken into account at the next calculation cycle.

You can change the one or the both temperature (when present or when absent) of each preset.

Use the following code the set the temperature of the preset:

service: versatile_thermostat.set_preset_temperature
data:
    preset: boost
    temperature: 17.8
    temperature_away: 15
target:
    entity_id: climate.my_thermostat

Or to change the preset of the AC mode, add _ac to the preset name like this:

service: versatile_thermostat.set_preset_temperature
data:
    preset: boost_ac
    temperature: 25
    temperature_away: 30
target:
    entity_id: climate.my_thermostat

Notes - after a restart the preset are resetted to the configured temperature. If you want your change to be permanent you should modify the temperature preset into the confguration of the integration.

Change security settings

This service is used to dynamically modify the security parameters described here Advanced configuration. If the thermostat is in security mode the new settings are applied immediately.

To change the security settings use the following code:

service : thermostat_polyvalent.set_security
data:
    min_on_percent: "0.5"
    default_on_percent: "0.1"
    delay_min: 60
target:
    entity_id : climate.my_thermostat

ByPass Window Check

This service is used to bypass the window check implemented to stop thermostat when an open window is detected. When set to true window event won't have any effect on the thermostat, when set back to false it will make sure to disable the thermostat if window is still open.

To change the bypass setting use the following code:

service : thermostat_polyvalent.set_window_bypass
data:
    window_bypass: true
target:
    entity_id : climate.my_thermostat

Notifications

Significant thermostat events are notified via the message bus. The notified events are as follows:

versatile_thermostat_security_event: a thermostat enters or exits the security preset
versatile_thermostat_power_event: a thermostat enters or exits the power preset
versatile_thermostat_temperature_event: one or both temperature measurements of a thermostat have not been updated for more than security_delay_min minutes
versatile_thermostat_hvac_mode_event: the thermostat is on or off. This event is also broadcast when the thermostat starts up
versatile_thermostat_preset_event: a new preset is selected on the thermostat. This event is also broadcast when the thermostat starts up

If you have followed correctly, when a thermostat goes into safety mode, 3 events are triggered:

versatile_thermostat_temperature_event to indicate that a thermometer has become unresponsive,
versatile_thermostat_preset_event to indicate the switch to security preset,
versatile_thermostat_hvac_mode_event to indicate the possible extinction of the thermostat

Each event carries the key values of the event (temperatures, current preset, current power, etc.) as well as the states of the thermostat.

You can very easily capture its events in an automation, for example to notify users.

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
`window_bypass_state`	True if the bypass of the window detection is activated
`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
`security_delay_min`	The delay before setting the security mode when temperature sensor are off
`security_min_on_percent`	The minimal on_percent below which security preset won't be trigger
`security_default_on_percent`	The on_percent used when thermostat is in `security`
`last_temperature_datetime`	The date and time in ISO8866 format of the last internal temperature reception
`last_ext_temperature_datetime`	The date and time in ISO8866 format of the last external temperature reception
`security_state`	The security state. true or false
`minimal_activation_delay_sec`	The minimal activation delay in seconds
`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
`valve_open_percent`	The opening percentage of the valve
`regulated_target_temperature`	The self-regulated target temperature calculated
`is_inversed`	True if the command is inversed (pilot wire with diode)

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 See the code of this component [below]

Fine tuned thermostat Thank's impuR_Shozz ! We can see stability around the target temperature (consigne) and when at target the on_percent (puissance) is near 0.3 which seems a very good value.

Enjoy !

Even better

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

You can customize this component using the HACS card-mod component to adjust the alert colors. Example for displaying safety and load shedding alerts in red:

          card_mod:
            style: |
              {% if is_state('binary_sensor.thermostat_chambre_security_state', 'on') %}
              ha-card .body .sensor-heading ha-icon[icon="mdi:alert-outline"] {
                color: red;
              }
              {% endif %}
              {% if is_state('binary_sensor.thermostat_chambre_overpowering_state', 'on') %}
              ha-card .body .sensor-heading ha-icon[icon="mdi:flash"] {
                color: red;
              }
              {% endif %}

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    <--- for over_switch
    attribute: on_percent
    name: Power percent
    curve: stepline
    yaxis_id: right
  - entity: climate.thermostat_mythermostat    <--- for over_thermostast
    attribute: regulated_target_temperature
    name: Regulated temperature
    curve: stepline
    yaxis_id: left
  - entity: climate.thermostat_mythermostat    <--- for over_valve
    attribute: valve_open_percent
    name: Valve open percent
    curve: stepline
    yaxis_id: right

And always better and better with the NOTIFIER daemon app to notify events

This automation uses the excellent App Daemon named NOTIFIER developed by Horizon Domotique that you will find in demonstration here and the code is [here](https ://github.com/jlpouffier/home-assistant-config/blob/master/appdaemon/apps/notifier.py). It allows you to notify the users of the accommodation when one of the events affecting safety occurs on one of the Versatile Thermostats.

This is a great example of using the notifications described here notification.

alias: Surveillance Mode Sécurité chauffage
description: Envoi une notification si un thermostat passe en mode sécurité ou power
trigger:
  - platform: event
    event_type: versatile_thermostat_security_event
    id: versatile_thermostat_security_event
  - platform: event
    event_type: versatile_thermostat_power_event
    id: versatile_thermostat_power_event
  - platform: event
    event_type: versatile_thermostat_temperature_event
    id: versatile_thermostat_temperature_event
condition: []
action:
  - choose:
      - conditions:
          - condition: trigger
            id: versatile_thermostat_security_event
        sequence:
          - event: NOTIFIER
            event_data:
              action: send_to_jmc
              title: >-
                Radiateur {{ trigger.event.data.name }} - {{
                trigger.event.data.type }} Sécurité
              message: >-
                Le radiateur {{ trigger.event.data.name }} est passé en {{
                trigger.event.data.type }} sécurité car le thermomètre ne répond
                plus.\n{{ trigger.event.data }}
              callback:
                - title: Stopper chauffage
                  event: stopper_chauffage
              image_url: /media/local/alerte-securite.jpg
              click_url: /lovelace-chauffage/4
              icon: mdi:radiator-off
              tag: radiateur_security_alerte
              persistent: true
      - conditions:
          - condition: trigger
            id: versatile_thermostat_power_event
        sequence:
          - event: NOTIFIER
            event_data:
              action: send_to_jmc
              title: >-
                Radiateur {{ trigger.event.data.name }} - {{
                trigger.event.data.type }} Délestage
              message: >-
                Le radiateur {{ trigger.event.data.name }} est passé en {{
                trigger.event.data.type }} délestage car la puissance max est
                dépassée.\n{{ trigger.event.data }}
              callback:
                - title: Stopper chauffage
                  event: stopper_chauffage
              image_url: /media/local/alerte-delestage.jpg
              click_url: /lovelace-chauffage/4
              icon: mdi:radiator-off
              tag: radiateur_power_alerte
              persistent: true
      - conditions:
          - condition: trigger
            id: versatile_thermostat_temperature_event
        sequence:
          - event: NOTIFIER
            event_data:
              action: send_to_jmc
              title: >-
                Le thermomètre du radiateur {{ trigger.event.data.name }} ne
                répond plus
              message: >-
                Le thermomètre du radiateur {{ trigger.event.data.name }} ne
                répond plus depuis longtemps.\n{{ trigger.event.data }}
              image_url: /media/local/thermometre-alerte.jpg
              click_url: /lovelace-chauffage/4
              icon: mdi:radiator-disabled
              tag: radiateur_thermometre_alerte
              persistent: true
mode: queued
max: 30

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