Repurpose your old Kindle
Hacker News
February 24, 2026
AI-Generated Deep Dive Summary
Repurposing an old Kindle to display live bus arrival times offers a creative solution for commuters seeking affordable, real-time travel information. By jailbreaking the device and installing custom apps like KUAL and MRPI, the author transformed a闲置 Kindle into a functional dashboard that refreshes every minute. This hack eliminates the need for expensive gadgets like TRMNL, providing a budget-friendly alternative for tech-savvy individuals.
The process involves several key steps. First, jailbreaking the Kindle allows access to its underlying system, enabling the installation of custom software. KUAL and MRPI are essential for running third-party apps, while SSH setup provides remote access to the device. With these tools in place, the author ran a local server to generate images tailored to the Kindle’s screen resolution. Using NJTransit’s public GraphQL API, the server fetches bus arrival data and displays it on the device.
The project highlights the potential of repurposing older technology for new uses, particularly for those interested in DIY tech projects or sustainable living. By leveraging free resources and avoiding costly commercial devices, this hack demonstrates how to make technology work smarter and more affordably. For anyone looking to experiment with hardware hacking or optimize their commute, this guide offers a practical starting point.
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Originally published on Hacker News on 2/24/2026