Now that the overall code structure has been largely established, we welcome potential feature additions/improvements
We are also actively seeking contributors to create walkthroughs/tutorials on building and using SeedSigner
We are seeking a smaller group of more technical users to test new features and upcoming releases

Please contact @SeedSigner on Twitter/Telegram to inquire with any questions about contributing!

Shopping List

To build a SeedSigner, you will need:

Raspberry Pi Zero (version 1.3 with no wireless capability)
Waveshare 1.3" 240x240 pxl LCD (more info at https://www.waveshare.com/wiki/1.3inch_LCD_HAT)
Pi Zero-conpatible camera (tested to work with the Aokin / AuviPal 5MP 1080p with OV5647 Sensor)

Notes:

Other cameras with the above sensor module should work, but may not fit in the Orange Pill enclosure
Choose the Waveshare screen carefully; make sure to purchase the model that has a resolution of 240x240 pixels

The easiest way to install the software is to download the "seedsigner_X_X_X.zip" file in the current release, extract the seedsigner .img file, and write it to a MicroSD card (at least 4GB in size or larger). Then install the MicroSD in the assembled hardware and off you go.

Now make your own "Orange Pill" enclosure too!

The Orange Pill enclosure design has been open-sourced! Check out the "Orange_Pill" folder in this repo. You'll need the following additional hardware to assemble it:

4 x F-F M2.5 spacers, 10mm length
4 x M2.5 pan head screws, 6mm length
4 x M2.5 pan head screws, 12mm length

The upper and lower portions of the enclosure can be printed with a conventional FDM 3D printer, 0.2mm layer height is fine, no supports necessary. The buttons and joystick nub should be produced with a SLA/resin printer (orient the square hole on the joystick nub away from the build plate). An overview of the entire assembly process can be found here:

https://youtu.be/aIIc2DiZYcI

Feature Highlights:

Calculate word 12/24 of a BIP39 seed phrase
Create 24-word BIP39 seed phrase with 99 dice rolls
Temporarily store up to 3 seed phrases while device is powered
Native Segwit Multisig XPUB generation w/ QR display
Scan and parse transaction data from animated QR codes
Sign transactions & transfer XPUB data using animated QR codes
Support for Bitcoin Mainnet & Testnet
Responsive, event-driven user interface
Only valid input letters appear during seed word entry (time-saver!)

Considerations:

Built for compatibility with Specter v1.1.0 and up (support for other wallet coordinators coming)
Current release takes ~50 seconds to boot before menu appears (be patient!)
Use Specter's "other" device type when adding as a new signing device
ALWAYS opt to use animated QR codes in Specter-desktop
Always test your setup before transfering larger amounts of bitcoin (try testnet first!)
Currently ONLY generating Native Segwit Multisig Xpubs
Scanning animated QRs into a PC is tricky, be aware of ambient light, glare and focus
(Holding the screen upside-down or at a slight angle can significantly reduce glare)
Display text is small; comes with 240x240 pixel territory but ever trying to optimize
Check out our "seedsigner" telegram community for community help / feedback: (https://t.me/joinchat/GHNuc_nhNQjLPWsS)
If you think SeedSigner adds value to the Bitcoin ecosystem, please help me spread the word! (tweets, pics, videos, etc.)

Planned Upcoming Improvements / Functionality:

Support for Sparrow & Bluewallet multisig coordinators!
Support for single-signature XPUB generation / signing
Manually step through QR sequences using button/joystick controls
Other optimizations based on user feedback!

MANUAL BUILD INSTRUCTIONS:

The software can also be manually installed using an internet-connected Raspberry Pi 2/3/4 or Zero W are as follows:

Install the Raspberry Pi Lite operating system (https://www.raspberrypi.org/software/operating-systems/) on a MicroSD card and install the card in a Raspberry Pi 2/3/4 or Zero W.

Connect a keyboard & monitor, or SSH into the Pi if you're familiar with that process.

sudo raspi-config

(set your localization options, configure WiFi if necessary, but most important: navigate to the "interface options" and enable the "SPI" interface; also make sure to enable the camera interface in raspi-config)

Reboot when prompted within the raspi-config interface

Install these dependencies:

sudo apt-get update
sudo apt-get install wiringpi
sudo apt-get install python3-pip
sudo apt-get install python3-numpy
sudo apt-get install python-pil
sudo apt-get install libopenjp2-7
sudo apt-get install ttf-mscorefonts-installer
sudo apt-get install git
sudo apt-get install python3-opencv
sudo apt-get install libzbar0
sudo apt-get install python3-picamera

Install this:

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.60.tar.gz
tar zxvf bcm2835-1.60.tar.gz
cd bcm2835-1.60/
sudo ./configure
sudo make && sudo make check && sudo make install
cd ..

Install these python dependencies:

sudo pip3 install --verbose spidev
sudo pip3 install --verbose RPi.GPIO
sudo pip3 install --verbose pillow
sudo pip3 install --verbose embit
sudo pip3 install --verbose qrcode
sudo pip3 install --verbose imutils
sudo pip3 install --verbose pyzbar
sudo pip3 install --verbose argparse
sudo pip3 install --verbose imutils

Download SeedSigner

sudo git clone https://github.com/SeedSigner/seedsigner

Modify the systemd to run SeedSigner at boot:

sudo nano /etc/systemd/system/seedsigner.service

Add the following contents to the file:

[Unit]
Description=Seedsigner

[Service]
WorkingDirectory=/home/pi/seedsigner
ExecStart=/usr/bin/python3 /home/pi/seedsigner/main.py
Restart=always

[Install]
WantedBy=multi-user.target

Use Control + O, then [enter], to write the file. Then use Control + X, to exit the program.

Run sudo systemctl enable seedsigner.service to enable service on boot. (This will restart the seedsigner code automatically at startup and if it crashes.)

(Optional) Modify the system swap configuration to disable virtual memory:

sudo nano /etc/dphys-swapfile add CONF_SWAPSIZE=100 to CONF_SWAPSIZE=0

Use Control + O, then [enter], to write the file. Then use Control + X, to exit the program.

To shut down the pi:

sudo shutdown --poweroff now

Now either move the MicroSD card to a Pi Zero 1.3 with the 1.3-inch LCD Hat and camera installed, or the LCD Hat will also run fine on a Raspberry Pi 2/3/4 or Zero W; just remember to disable networking if you want to run the software in isolation.

It will take a couple of minutes after the Pi is powered on for the GUI to launch -- be patient!