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Old 02-05-2018, 08:12 PM   #3120
Dingding6
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Join Date: Apr 2018
Posts: 114
for bus, is it every card needs to contact server? that would be very slow.
i thought there should be some offline processing.
the best spot to tap iphone for mrt is center area somewhere near the card logo, as discussed few days ago. i tried and confirmed it's somewhere there. but not sure whether this only applicable for readers in good condition.
if offline processing, then they would need a server inside a bus which is unlikely

else how would they know your balance real time for ez-link, inside the ezlink/credit card only have antenna coil and a nfc chip, no memory to store anything.

i concur with the tap at the logo, i have more consistent successful tap there.

if only there is someone have a teardown of the bus card reader, i would easily know where to tap....
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