Add tolerance to allow picking earlier time frames

[sshaikh]

Describe the feature

The integration does a great job in figuring out the absolutely cheapest target in a range of data. However sometimes it's preferable to pick an earlier window if its average rate is not too different from the optimal one. If we were able to configure this tolerance then TT would prefer a later timeframe only if it's less by that amount.

Expected behaviour

Given the 30 min data:

D0: 5
D1: 5
D2: 4
D3: 4

A request for a 1 hour target would return D2D3 with an average of 4.

Looking at the other options, D0D1 averages 5 and D1D2 averages 4.5.

So a configured tolerance of 0.5 would return D1D2, while 1 would return D0D1.

Use Case

In some households it is preferred to get things done sooner if it would only cost marginally more to do so. This would let the user configure how much they are willing to overspend from the optimal to get an earlier window.

Confirmation

• By submitting this feature request, you agree that you have read the documentation and confirmed it does not already exist
• I am willing/able to help contribute to the solution of this feature

[paddywwoof]

I have a similar question/suggestion: variable number of hours in TargetTimeframes. (apologies if this isn't the intention of @sshaikh suggestion)

I am in the process of moving to HA a DIY python-on-raspberry-pi system that's been working fine for years but would like to make more resilient. For my immersion heater and battery I look to see how much energy is needed to get up to required charge or temperature. I then have a variable number of hours needed which I use to select the lowest agile rates. I check the battery charge state and immersion temperature from time to time and revise the number of hours accordingly.

[sshaikh]

This isn't what I'm asking for, so apology accepted ;).

But! If you are asking how to programmatically update the hours in a target, this is already possible via an action:

https://bottlecapdave.github.io/HomeAssistant-TargetTimeframes/services/#target_timeframesupdate_target_timeframe_config