https://www.raspberrypi.com/products/raspberry-pi-zero-2-w/ https://www.raspberrypi.com/products/raspberry-pi-zero-w/

I can't find definitive information for RPi 4 though, I see some references to using it online but the spec here does not seem to mention USB host or OTG

https://www.raspberrypi.com/products/raspberry-pi-4-model-b/...

One popular request I’ve received is for certain RPi models (those with multiple USB ports as host) to act as a KVM, allowing them to serve as a USB host for multiple PCs simultaneously with easy switching—perhaps through shortcuts or physical buttons on the RPi. I’ll need to give it more thought, but it seems feasible with minimal changes. I already have some ideas for better state management for the devices!

Another thought around this is that I don't even think there's anything intrinsically insecure about BT as an attack vector but most likely some old policy based on security issues that existed in the early days of Bluetooth. Or at least I don't know of any, but I'm no expert in this so I would love to hear other people's insights here.

That’s where this relay comes in—it bridges Bluetooth to USB, so you can still use your devices.

I'm glad you might find this useful, be sure to create an issue on GH in case you run into any and I'll try my best to help :)

I think that's a fair point about potentially wasted resources, something like Pico would have been and a leaner choice if this was going to be mass-produced. But for me, part of the decision was my comfort level with system programming and what I desired to tinker with and learn along the way and still, it's a very affordable option (around 20 CAD I believe)

Perhaps I'll look into porting it to Pico in future as new challenge and learning experience. Thank you for your sharing your thoughts.

Great question. I can see this being fairly easily extendable to other HID devices and even modifying their behaviour slightly (e.g. remapping a key) but audio stack sounds like (no pun intended) a different beast altogether. A buddy of mine had a similar question around connecting his BT gamepad and headset to play PS games on PC so I'll be looking into this more.

Why? My friend needed a way to use his Bluetooth mouse and keyboard on a PC with Bluetooth disabled due to policy restrictions. This tool acts as a bridge, relaying Bluetooth input over USB. It also lets you use Bluetooth peripherals with older devices that only support USB input.

Tech: Written in Go, optimized for Raspberry Pi Zero W.

I love HN’s community and often lurk here—I’m hoping this project is useful or at least sparks some interesting discussions. Feedback and contributions are welcome!

Comments URL: https://news.ycombinator.com/item?id=42125863

Points: 233

# Comments: 113

Remote: Yes, also open to hybrid in or near Toronto

Willing to relocate: Open to discussion

Technologies: Experienced with React, React Native, Node.js, Go, GraphQL and Kubernetes

Résumé/CV: Available upon request. GitHub: https://github.com/bahaaador LinkedIn: https://www.linkedin.com/in/baiz

Email: inverse_parsley.0b@icloud.com

Hi HN! I’m a full-stack engineer with 12+ years of experience building web and mobile apps.

Recently, I’ve:

• Led development for multi-platform apps (web and mobile) • Built a Bluetooth-to-USB HID relay using a Raspberry Pi Zero and Go to help a friend (and because it was fun :) ) • experimented with ways to incorporate AI-driven solutions into product workflows.

I bring experience across early-stage startups and mid-sized companies, with a strong focus on accessibility, security, and privacy. I’m dedicated to writing clean, maintainable code and crafting great UX, with a constant drive to learn and tackle challenging projects.

If you’re working on something exciting and need a versatile, experienced engineer, let’s chat!