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Given the very limited resources, it seems to be unlikely to do a show lasting the full 5 minutes Tesla allows (in theory).
My "Wizards In Winter" show has a sequence lasting 3 seconds and eating away more than 15% of the resources.
That being said, synchronizing multiple Teslas seems to be the way to go for a full and rich show lasting 3 to 5 minutes.
On my wish list would be something to help synchronizing - for example allowing to remotely start the show from the app rather than having to close the door. Sharing the audio via BT from a single source also would be a nice feature with multiple cars.
Given the very limited resources, it seems to be unlikely to do a show lasting the full 5 minutes Tesla allows (in theory).
My "Wizards In Winter" show has a sequence lasting 3 seconds and eating away more than 15% of the resources.
There are some tricks to drastically reduce resources. Use the validator through trial and error saves you time. I'll document my findings when I have an opportunity.
Here is my latest attempt with the more complex sequence using 99% resources:
You are limited to a total of 681 commands, regardless of the length of the show.
A show lasting 5 minutes has 300 seconds which means you get 2.27 commands per second on average for that 5-minute show.
The validator can't change that.
Interesting however is that you say your show uses 99% resources according to the validator.
My own testing has shown that at least for my M3LR the car refuses any sequence using more than about 94%.