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In this post we will build Firefly hardware wallet.
Itâs 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.
Letâs 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.
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 |Â eBay.com
- nRF24L01+ Amazon.com |Â eBay.com
- 128x64 OLED Display (I2C) Amazon.com |Â eBay.com
- Tactile Button (6mm x 6mm x 5mm) Amazon.com |Â eBay.com
- Breadboard (830 points) Amazon.com |Â eBay.com
- Wire (22 gauge, solid core) Amazon.com |Â eBay.com
Here you can find code for the IOSÂ app.
Thanks for reading ;)
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Want to learn more? Checkout my previous articles.
- 5 resources to get started with ethereum
- Quantum Computing: Is it the end of blockchain?
- 13 sidechain projects every blockchain developer should know about
- EOS 101: Getting started with EOS, Part 1
Building Your Own Ethereum Hardware Wallet For $5 was originally published in Hacker Noon on Medium, where people are continuing the conversation by highlighting and responding to this story.
Disclaimer
The views and opinions expressed in this article are solely those of the authors and do not reflect the views of Bitcoin Insider. Every investment and trading move involves risk - this is especially true for cryptocurrencies given their volatility. We strongly advise our readers to conduct their own research when making a decision.