Hardware
THE ESSENTIALS
1. Raspberry Pi Zero (v1.3 preferred, W acceptable)
2. WaveShare 1.3 inch LCD display w/ controls (must have a 240×240 pixel display)
3. Raspberry Pi Zero compatible camera module
4. MicroSD Card with at least 64MB capacity
Raspberry Pi Zero
For the highest assurance your signer is operating in network isolation, the Raspberry Pi v1.3 has no WiFi or Bluetooth capability. Any Raspberry Pi 2/3/4 or Zero model will however work with SeedSigner software.
Note: GPIO pins may not be already installed on your Raspberry Pi Zero; if not you can solder pins on yourself, or contact a local mobile phone repair shop that can easily attach the pins for you.
Note: The Raspberry Pi Zero W can be easily modified to permanently disable its wireless communication capability. You can find more info on this process HERE.
Raspberry Pi Camera
Two different camera profiles are commonly used with the Raspberry Pi Zero.
A more generic Raspberry Pi camera can be used, with a gold-colored cable that is compatible with Pi Zero (see image).
Smaller “Zero” style cameras are designed specifically for the Pi Zero and will also work with SeedSigner.
If you plan to install your hardware in an enclosure, make sure to double check which camera style your enclosure is designed to accommodate.
Lets Build!
Here is a demonstration of what the build process typically looks like:
Component Purchase Links
(Please note that none of the retailers in this section are bitcoin-specific, which can help mitigate the supply chain risk and/or personal information leak commonly associated with buying a commercial bitcoin hardware wallet)
Raspberry Pi Zero:
– Raspberry Pi Zero v1.3: Adafruit, The Pi Hut, Pimoroni
RPiLocator.com is a great global resource for Raspberry Pi buyers.
Waveshare LCD Hat:
– EU: Welectron
– Worldwide: AliExpress
Raspberry Pi Camera:
– North America: Amazon Type 1, Amazon Type 2
– WorldWide: AliExpress Type 1, AliExpress Type 2
Enclosures and Assembled Signers
Enclosures and/or non-RPi components:
– EU/UK: GoBrrr, DIYNodes, AnchorHodl, Robotechy
– USA/Canada: BTC Hardware Solutions (by project creator/leader)
– Brazil: StackBit
– Australia: HansMade
Notes on purchasing kits / assembled signers:
There are no “official” or “approved” SeedSigner vendors; sellers should have a good reputation within their local bitcoin community, should never ship devices with preloaded software, and ideally should donate a portion of their revenue to our contributors. You can find more info on items to consider when selecting a seller here.
SeedSigner kits / assembled signers:
– EU/UK: GoBrrr, VULCAN, DIYNodes, BitcoinBrabant, Bitsaga
– USA/Canada: BTC Hardware Solutions (by project leader/creator)
– Brazil: StackBit
– Australia: HansMade