I am building a DIY Yubikey in a sense. It uses a raspberry pi and RFID Reader to log into my various devices, and I plan to add functionality to enter system passwords I use frequently. The system will have a screen to indicate important data, a clickable joystick to control the system, and a raspberry pi pico H as the main controller.
I got the raspberry pi working with my keyfob, and It is now able to type out my password for my mac, and log me in. It presses enter to wake the device, types the password and then will press enter again to send the PW. Programming and actually getting the RFID to work on the RasPI was so painful, it kept giving random errors, failing to read and just outright not responding.
I added the arduino UID reader code, so that I now can get the UIDs for my keycards and fobs. The next step I will do is writing some basic code to recognise my RFID Tags and log me into my laptop as a starting point.
So, I built the first stage today, a way to check your key/s UID as otherwise anyone can log in as you! It is a simple python script that will run on a Raspberry Pi. I want to make another version soon that will work on arduino as that way I can keep my RasPi for the actual device and use an arduino for tests. It checks for cards using rfid.request and retrieves the UID using rfid.anticoll. It also formats everything nicely and has a 0.1s delay to reduce load on microprocessors.
