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PROGRAMMABLE THERMOSTAT

This component is a revision of the official Home Assistant component 'Generic Thermostat' in order to have possibility to have target temperature variable according to a sensor state value.

EXAMPLE OF SETUP

Config flow is available, so just configure all the entities you want through the user interface.

Here below the example of manual setup of sensor and parameters to configure.

climate:
  - platform: programmable_thermostat
    name: room
    heater: 
      - switch.riscaldamento_1
      - switch.riscaldamento_2
    cooler: switch.condizionamento
    actual_temp_sensor: sensor.target_temperature
    min_temp: 10
    max_temp: 30
    target_temp_sensor: sensor.program_temperature
    tolerance: 0.3
    related_climate: climate.room_2
    hvac_options: 7
    auto_mode: all
    min_cycle_duration:
      seconds: 20
Field Value Necessity Comments
platform programmable_thermostat Required
name Programmable Thermostat Optional
heater Conditional Switch that will activate/deactivate the heating system. This can be a single entity or a list of entities. At least one between heater and cooler has to be defined.
cooler Conditional Switch that will activate/deactivate the cooling system. This can be a single entity or a list of entities. At least one between heater and cooler has to be defined.
actual_temp_sensor Required Sensor of actual room temperature.
min_temp 5 Optional Minimum temperature manually selectable.
max_temp 40 Optional Maximum temperature manually selectable.
target_temp_sensor Required Sensor that rapresent the desired temperature for the room. Suggestion: use my file_restore compontent or something similar.
tolerance 0.5 Optional Tolerance for turn on and off the switches mode.
initial_hvac_mode heat_cool, heat, cool, off Optional If not set, components will restore old state after restart. I suggest to not use it.
related_climate Optional To be used if the climate object is a slave of an other one. below 'Related climate' chapter a description.
hvac_options 7 Optional This define which combination of manual-auto-off options you want to active. Refer to chapter below for the value.
auto_mode all, heating, cooling Optional This allows to limit the the heating/cooling function with HVAC mode HEAT_COOL.
min_cycle_duration Optional TIMEDELTA type. This will allow to protect devices that request a minimum type of work/rest before changing status. On this you have to define hours, minutes, seconds as son elements.

SPECIFICITIES

TARGET TEMPERATURE SENSOR

target_temp_sensor is the Home Assistant entity_id of a sensor which state change accrodingly a specified temperature profile. This temperature profile should described the desired temperature for the room each day/hour. target_temp_sensor must have a temperature value (number with or without decimal) as state.

Suggestion: use my file_restore custom components.

ADDITIONAL INFO

Programmed temperature will change accordingly to the one set by the target_temp_sensor when in heat_cool mode. You can still change it temporarly with the slider. Target temperature will be set, again, to the one of target_temp_sensor at its first change. heat and cool modes are the manual mode; in this mode the planning will not be followed.

After a restart of Home Assistant, room temperature and planned room temperature will match till actual_temp_sensor will return a temperature value. This is done to avoid possible issues with Homekit support with temperature sensor that need some time to sync with Home Assistant.

RELATED CLIMATE

This field is used if the climate 2 climate object are related each other, for example if they used the same heater. Set this field with the entity_id with a different climate object and this will prevent the heater/cooler to be turned off by the slavery climate if the master one is active.

For example I have 2 climate objects, one for the room and one for the boiler. Boiler's climate is used to prevent freezing and, if the temperature is lower the the programmed one, room heater is turned on. This means that, if the room's heater is on and boiler's heater is off, boiler will turn off the heater despite the room one. With this master_climate field this unwanted turn off will not happen.

Note: my suggestion is to set it to both climates that are related each other.

HVAC OPTIONS

This parameter allows you to define which mode you want to activate for that climate object. This is a number with a meaning of each single bit. Here below the table.

bit3 - AUTOMATIC bit2 - MANUAL bit1 - OFF RESULT Meaning
0 0 0 0 Noting active - USELESS
0 0 1 1 OFF only
0 1 0 2 MANUAL only, you will have only heat and/or cool modes
0 1 1 3 MANUAL and OFF
1 0 0 4 AUTOMATIC only, you will have only heat_cool modes
1 0 1 5 AUTOMATIC and OFF
1 1 0 6 AUTOMATIC and MANUAL
1 1 1 7 DEAFAULT - Full mode, you will have active all the options.

HEATERS AND COOLER SPECIFITIES

From version 7.6 you will be able to set heaters and coolers to the same list and you'll get the correct way of work in manual mode. This means that heat and cool mode will work correctly with the same list, but heat_cool mode will not (otherwise you will not be able to switch the real device between the 2 modes). My suggestion is to set hvac_options: 3 to remove the auto mode.

NOTE

This component has been developed for the bigger project of building a smart thermostat using Home Assistant and way cheeper then the commercial ones. You can find more info on that here