TapShard TOTP token
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An enclosure for a bluetooth TOTP token based on a nRF52840 ProMicro dev board.
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Updated at source:
Model information
- Source
- Printables
- Category
- Portable Devices
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
To build the device in this enclosure, you will need the following components:
nRF52840 ProMicro board (nice!nano v2 might work too)
501530 (or smaller) LiPo battery
2× 3-pin 4.5 × 4.5 × 3.8 mm TS-C017 side tact button
The board with buttons soldered is a bit tricky to get into place, so it is advised to test-fit a bare board first. Also, make sure the case button can be pressed, it may stick if the bridges above sag too much.
Snip off the middle pin from the buttons. Solder them on the reverse side of the board facing outwards, one between GND and RST, other to P0.10 and P1.11. Cut the battery wires to around 20 mm as the space for them is limited.
The firmware source is published at https://github.com/mi-v/tapshard. UF2 binaries will be available after I get a USB PID assigned.