I am successfully using Homematic thermostats (HM-CC-RT) in HA. There is a Holiday mode available in CCU2 firmware and also on the thermostat itself. If I press the button it switches between Auto, Manual and Holiday mode.
Is it possible to activate Holiday mode through Home Assistant, because I only see options Auto, Boost, Manual, Comfort and Lowering in HA interface?
Holiday mode in CCU2:
The Lowering mode should be what the CCU displays as holiday mode. It’s called lowering in HASS because the technical term the devices use internally is lowering.
If I select lowering in HA, temperature set on thermostat changes to 17 °C and it writes auto in HA and on thermostat. So if I select lowering, will it stay on that temperature forever or will it act like auto and change back to automatic temperature?
Holiday mode gives an option to set a constant temperature for a specific time period (date and time). On CCU2 looks like this:
In Homematic manual it writes like this for setting it directly on thermostat:
Briefly press the Auto/Manu button ( ) repeatedly,
until the suitcase symbol ( ) appears in the display.
• Change the time for starting the temperature with the
handwheel and confirm with the Boost button ( ).
• Change the date for starting the temperature with the
handwheel and confirm with the Boost button ( ).
• Change the time and date for starting the temperature
with the handwheel and confirm with the Boost
button ( ).
• Change the temperature with the handwheel and
confirm with the Boost button ( ). The display will
flash to confirm.
It seems as if I mixed something up. Lowering is what your english UI refers to as the reduction temperature, which is Eco in the german version.
Implementing the holiday mode is not possible, because it requires the manual configuration of start and end times you have mentioned. The HASS UI is not capable of handling such a “complex” operation with it’s simple UI elements. In theory it is possible to set those values, but we’re limited by what the HASS UI offers.
But to be honest: with HASS you don’t really need the holiday mode. The holiday mode sets the thermostat to X degrees for a specific timeframe. You can easily do that with automations in HASS. You could even base the automation on some calendar so that you would never have to enter anything.
Yeah, you’re right. I can achieve the same or even better functionallity with HASS automations.
Thank you for your help 
