Ok, that seems to be a little bit more complicated than I antcipated. Thanks for the link!
Yeah. Bluetooth wasn’t originally designed for this use case. It’s bad at estimating distance. Smartphones don’t really make it easy for apps to run in background on Bluetooth with no prompt to “wake up”. It’s kind of a hack that car manufacturers are doing keys this way.Ok, that seems to be a little bit more complicated than I antcipated. Thanks for the link!
And this would be in contrast to the PS marketing sprech which I remember to be something like 'when you walk up to the car it wakes up automagically and greats you with a light'.the obvious downside is that you pretty much have to take out your phone to do it
I’ll slightly disagree with this part: The entire issue is that Bluetooth signal is an unreliable indicator of distance, and in “ideal” circumstances can actually be detected pretty far away. I can often continue listening to my AirPods when at the other side of my house from my iPhone. That’d be bad if my Polestar 2 thought my phone was close enough just due to presence of signal at other end of my house. So the car should be using signal strength, not just presence.The car key would be even simpler as you don't have to calculate the distance from the signal, only the presence of the phone.
Something like this has to be the case. You don't want someone on the other side of the car opening a door when you are trying to get into the driver door. Even today's key fobs are that smart. You can only open the door you're next to.I believe more complicated setups attempt to use multiple bluetooth antennae to try to triangulate. Polestar 2 marketing material somewhat indicated this may be the case for that car. But I’m not sure anyone yet knows specifics about Polestar’s implementation.
If the 12v battery is flat, how would an RFID car unlock the doors? Like you said, you need the physical metal key hidden inside the ‘black brick’ to unlock the door. Maybe we need tips from @dave about ‘man purses’ again so we have somewhere safe to keep the metal key without carrying the ‘brick’..?I assume while playing sports somewhere with no lockers, like an outdoor field?
That's of no use if the 12V battery has gone flat, which is a common end result when things go wrong. You need the physical key that's in the fob and can be pulled out when required.
Myself, I see the "phone as a fob" as a novelty for when it works. I'll always be carrying the sports key or probably even the full key, since when the car decides to flatten its 12V battery, you need the physical key to get in, pop the bonnet, get to the 12V battery and jump-start it to get it going again or allow it to be pulled onto the recovery truck.
Tesla deliberately provide a credit card sized RFID fob purely because it can sit in your wallet; sadly Polestar give you a small house brick!
Glad you asked. There are so many options. For Thunder-If the 12v battery is flat, how would an RFID car unlock the doors? Like you said, you need the physical metal key hidden inside the ‘black brick’ to unlock the door. Maybe we need tips from @dave about ‘man purses’ again so we have somewhere safe to keep the metal key without carrying the ‘brick’..?