Many vehicles today have a "phone key" feature where you can use your phone instead of a key and the vehicle automatically unlocks as your approach using BLE. Ford, Tesla, Mercedes, Rivian, and others have this feature, and many of these protocols are either open-source or have been reverse-engineered by enthusiasts.
I have partially implemented a solution on my Forerunner 245, but I am at a dead end because the watch cannot read or write more than 20 bytes at a time. Is this a hardware limitation? If not, is it possible that this functionality could be implemented?
I often go for runs and do not want to have to bring a key or my phone with me, and for me being able to unlock the car with my watch would be the ultimate solution.
As a side note, I know there is already a report for this but an NFC API would also be great! There are several examples of projects using NFC on a smartwatch as a key for a vehicle.
