RustyToken (I'm open to new names)

IT's a TOY utility to make a TOTP keychain. This it's a TOY, Please don't keep your top priority keys here. I disclaim any responsability for anything that may happen to your TOTP keys.

Hardware

To make your own RustyToken you'll need:

• 1 Arduino (UNO/Nano)
• 1 RTC DS3231
• 1 Screen STN LCD 16x2 without i2c interface
• 2 push buttons
• 1 220 ohms
• A lot of wire

Software

To build the firmware for your Arduino you'll need:

• A linux machine (I don't know if this compile on another OS)
• All the rust env tools (rustc, cargo, rustup)
• The Rust's nightly version
• all the AVR env build tools (avr-gcc, avr-binutils, avr-libc, avrdude)
• Python3 to use the tool

How to build and load the firmware

To build the firmware you execute:

$ ./build.sh

And to upload it to the Arduino, connect it to the computer and execute:

$ ./upload.sh

IF this step fails, edit the upload.sh script and change the /dev/ttyUSB0 to the Serial port assiged to your Arduino (You can check this path with the Arduino IDE)

Diagram