Why is the app showing 6553.5V?

GameZone

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Apparently all doors are marked as open, and no temperature o battery % displayed as well in the app.
 

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Sounds like a bug or data corruption. FWIW 65,535 is (2^16)-1, which in binary is sixteen 1's

i.e. 65535 decimal = 1111111111111111 in binary. So, all bits of a 2 byte register set to 1.

I suspect voltage is represented as a 16 bit register somewhere in units of 100mV. And for some reason that register has got set to all 1 bits?
 
I recall someone asking about this before, within the past 2 years or so. I think either an unlock/READY state/lock of the car, or clearing the cache (perhaps also data) in the app, resolved it.
 
I recall someone asking about this before, within the past 2 years or so. I
For example, using the search facility top right of every page:
and

Edit: It probably means that there was some sort of comms error that the iSmart app failed to detect. At least they initialised the values to "all ones" so you know it can't be right. If they didn't do that, you could potentially be misled by uninitialilised variables happening to have believable but not real values.
 
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