In this post we will build Firefly hardware wallet.
It’s an open-source, affordable, air-gapped hardware wallet for Ethereum you can build at home for around $5 in parts.
Here is a short video of its final working model.
Here are some of its features:
- Low Cost: Build it yourself for about $5 with an Arduino, a 2.4GHz radio, an OLED display and a few odds and ends.
- Air Gapped: Not connected by wires and cannot send wireless signals, keeping your private key safe from hackers.
- Mobile Friendly: Works with any smart phone to prepare and send transactions or sign secure messages.
Let’s make one for yourself
There are a lot of options and flexibility when building a Firefly. You may design your own case or use one of our 3D printable cases. To get started, it is recommend using this breadboard version.
breadboard
You can also customize the source code and add your own interesting features.
To get started, you will need a handful of parts, which are available from many sources, varying in price, delivery time and quality.
Some links are provided below to get the components to build Firefly(I am not affiliated with any of the vendors). In general, Amazon will arrive much quicker, but with a much higher price tag. Items from eBay will often be much cheaper, but ship from China, so may take longer to arrive. For purchasing in large quantities, Alibaba is by far your best choice, but also the most complicated.
Parts List
- Arduino Nano (ATmega328) Amazon.comeBay.com | eBay.com
- nRF24L01+ Amazon.com | eBay.com
- 128x64 OLED Display (I2C) Amazon.com | eBay.com
- Tactile Button (6mm x 6mm x 5mm) Amazon.com | eBay.com
- Breadboard (830 points) Amazon.com | eBay.com
- Wire (22 gauge, solid core) Amazon.com | eBay.com
Here you can find code for the IOS app.
Thanks for reading ;)
Learned something? Click the 👏 to say “thanks!” and help others find this article.
Hold down the clap button if you liked the content! It helps me gain exposure .
Want to learn more? Checkout my previous articles.
5 resources to get started with ethereum_Ultimate guide for understanding & starting with ethereum._hackernoon.com
Quantum Computing: Is it the end of blockchain?_Experts are suggesting quantum computing may render blockchain obsolete. As the tech giants such as Google and IBM are…_hackernoon.com
13 sidechain projects every blockchain developer should know about_The whole world is going through the blockchain revolution. But wait…is this really what we dreamed of? Present…_medium.com
EOS 101: Getting started with EOS, Part 1_The only blockchain which has blocktime of less than a second: 0.5 sec!_hackernoon.com