NFC and nRF52 series - Githubissues

changtimwu / changtimwu.github.com

Tim's testing/practice notes

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NFC and nRF52 series #90

Open changtimwu opened 6 years ago

changtimwu commented 6 years ago

nRF52832

nRF52832 spec -- Chap 42 NFCT — Near field communication tag Thingy-52

NFC on phone

iOS coreNFC overview Demo
iOS supports only NFC tag reading, which means iPhone acts as a NFC reader. No tag writing, no P2P, no card emulation.
NFC on android is much better. It supports the 3 major modes.

changtimwu commented 6 years ago

NFC payment implementation

Apple Pay doesn't need internet connection
Good mobile payment summary
Line Pay and 街口 are QR-code/Bar-code based. not NFC

changtimwu commented 6 years ago

Hardware wallet reference

https://github.com/trezor/trezor-mcu
State-of-the-art Attacks on Secure Hardware Wallets by Ledger Technologies

changtimwu commented 6 years ago

please ignore segger studio related stuff. Let get FW rebuild in command line work first.

download the thingy app
download 52sdk
follow steps here https://nordicsemiconductor.github.io/Nordic-Thingy52-FW/

changtimwu commented 6 years ago

control an NFC reader/writer with chrome's USB API
https://github.com/googlearchive/chrome-nfc

changtimwu commented 6 years ago

https://www.acs.com.hk/en/products/342/acr1252u-usb-nfc-reader-iii-nfc-forum-certified-reader/ https://oneguyoneblog.com/2016/11/02/acr122u-nfc-usb-reader-linux-mint/ https://stackoverflow.com/questions/33695891/accessing-card-emulation-mode-on-usb-nfc-reader

AC1252u supports card emulation mode.

setup

merchandiser setup the NFC reader into card emulation mode, which means the reader becomes a programmable tag. This is also called HCE -- host based card emulation
user's phone is in NFC reader mode so this is iPhone compatible.

every time trading occurs

POS places a payment request(supposed to be an URL) into the NFC reader. It's consist of
- Identity of the payment receiver
- amount
users phone wallet