BabyBowser
ESP32 Bitcoin Hardware Wallet (powered by uBitcoin)
This very cheap off the shelf hardware wallet is designed to work with Lilygos Tdisplay, but you can easily make work with any ESP32.
Data is sent to/from BabyBowser over webdev Serial, not the most secure data transmission method, but fine for handling small-medium sized amounts of funds. You can use LNbits OnchainWallet extension, or any other serial monitor.
Build instructions
- Buy a Lilygo Tdisplay (although with a little tinkering any ESP32 will do)
- Install Arduino IDE 1.8.19
- Install ESP32 boards, using boards manager
- Download this repo
- Copy these libraries into your Arduino install "libraries" folder
- Open this babybowser.ino file in the Arduino IDE
- Select "TTGO-LoRa32-OLED-V1" from tools>board
- Upload to device
How to use
// Guide to go here
Note: If using MacOS, you will need the CP210x USB to UART Bridge VCP Drivers available here https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers If you are using MacOS Big Sur or an Mac with M1 chip, you might encounter the issue
A fatal error occurred: Failed to write to target RAM (result was 0107), this is related to the chipsest used by TTGO, you can find the correct driver and more info in this GitHub issue