u/htotoo

Hey everyone! 👋

I’ve been working on a project and wanted to share it with the community: I created a new website specifically for hosting custom Mayhem standalone applications for the HackRF PortaPack.

You can check it out here: PortaPack App Repo (apps and the website is open source!)

Right now, it’s stocked with a bunch of games (like a Bomberman clone, retro racing, safe cracker, and a space invaders/centipede hybrid) and some prank apps.

How to use it: It’s super simple! Just download the .ppmp file of the app you want and copy it directly to the /APPS folder on your PortaPack's SD card. No complex flashing required.

What's next? This is just the beginning! I have more new apps in the pipeline that will be added to the site.

I’d love to hear what you guys think, and I am open to requests. If you have any cool ideas for new apps, games, or else you’d like to see on the PortaPack, come hang out and let me know on the Mayhem Discord or share it in comments. Sadly the standalone apps can't reach the radio interface so for now only "radioless" app ideas are implementable.

Let me know if you encounter any bugs or have any questions. Enjoy! 📡🎮

edit: edited the url to the official hackrf.app subdomain: https://apps.hackrf.app/

Hey everyone,

I wanted to share a custom firmware project I've been working on. While contributing to the main PortaPack Mayhem firmware, I wanted to experiment with a build dedicated entirely to RTL433. The result is Porta-433.

It’s an early alpha release, but it kinda works and I’m ready to get some feedback on it!

What is it? Porta-433 is a stripped-down custom firmware for the PortaPack platform. It’s built on the Mayhem foundation, but I intentionally removed most of the standard Mayhem applications to keep it lightweight and focused squarely on parsing and decoding supported RTL433 signals right on the device.

Key Details:

• RTL433 Support: Parses and decodes supported RTL433 signals directly (in theory, all of them).
• Easy Web Flashing: You can flash the custom Porta-433 image straight from your browser using the familiar workflow at hackrf.app.
• Painless Revert: If you decide you want your regular apps back, just go to hackrf.app. and re-flash the latest Mayhem Stable or Nightly.

Known Limitations (It is an Alpha!) Please keep in mind that this is highly experimental and actively changing. RTL433 was originally designed to run on a PC, so squeezing it into the PortaPack comes with constraints. Because of the limited memory and computing power, it might drop valid samples or only catch the nth repetition of a signal. Furthermore, fitting all the RTL433 data onto the small PortaPack screen is a tight squeeze.

A huge thank you to the Mayhem, RTL433, and HackRF teams and contributors—this wouldn't be possible without their work.

You can check out the details and grab the code from the repo here: https://github.com/htotoo/porta-433

You can go to the releases part, download the ppfw.tar, and flash.

PRs are welcome! (Note: If your change is a general firmware fix and not specifically related to RTL433, please submit it upstream to the main Mayhem project).

Use it at your own risk, but let me know what you think!

https://preview.redd.it/k181lc5xh31h1.png?width=240&format=png&auto=webp&s=f3c4bc35fa8643cca6e43ff2ecc5210a2e24a419