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makerdiary / nrf52840-mdk-usb-dongle

An open-source, small and low-cost USB Dongle that supports Bluetooth 5.4, Bluetooth mesh, Thread, Zigbee, 802.15.4, ANT and 2.4 GHz proprietary protocols
https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/
Apache License 2.0
301 stars 79 forks source link

NFC + OpenSK #19

Open Raboo opened 4 years ago

Raboo commented 4 years ago

I'm a bit novice when it comes to this, but what is required to get NFC to work with OpenSK on this nRF52840-mdk-usb-dongle? Does a NFC antenna need to be soldered on the board? Would a battery or a capacitor be required for this then, like mentioned here https://github.com/google/OpenSK/issues/15#issuecomment-582645999?

Or is it just the lack of NFC support in OpenSK?

tmikaeld commented 4 years ago

The dongle doesn't have NFC working unfortunately. I'm also curious if we can add an antenna ourselves?

NFC doesn't require a battery, the Yubikey works with NFC and it doesn't have any battery whatsoever.

cubic3d commented 4 years ago

@tmikaeld You can add an antenna for NFC, the pins are routed to the side connector on PCB. But it still requires a power source, since this particular SoC can not run from the power of the NFC field. The Yubikeys with NFC support are very low power devices.

I am also interested on the specifics for the antenna (form, dimensions, caps). Would be very interesting to have a reference modification.

AngainorDev commented 3 years ago

Interested as well.