Configurable time trigger

Alarms are not what I’m looking for.

My usecase:

  • set a time to leave (i.e. the time I need to get in my car)
  • have Homey calculate back the time to start charging, based on the “chargingtime left” (number of minutes) value that the car reports
  • start charging on “time-to-leave” -/- “chargingtime left” = “start charging time”

I don’t see any way to easily set a specifica time (other than the alarms), and I don’t see any way to calculate “time (hh:mm)” minus “x minutes” = “wanted time”

Anyone point me in the right direction?