* First step to epirb-tx app * Next step to epirb_tx app * Fixed merge * EPIRB TX app progress - Fixed UI - Added automatic frame resend after delay - Added load of beacons from EPIRB/BEACONS.TXT file * First step to adding 121.5 MHz signal * Refactored 121.5 signal generation code * Added frequency change when switching from BPSK to AM * Added checkbox for AM signal. Added START/STOP button Added AM frequency First step to editor mode. * Next step to frame editor * Fixed location bits. * Refactored code + fixed location * Added location fields * UI fixes + settings backup Fixed lat/long display Added send on change checkbox Added settings backup Fixed locator edition Fixed BEACONS.TXT to move to Self test beacons. * Update ui_epirb_tx.cpp Fixed timeout reset * Added national location protocol. Added national location protocol. Fixed send on change. * UI fixes Added country selection Separated beacon protocol and beacon type selectors * Standard protocol Added standard protocol Added internal checkbox * Fixed fomratting * Code cleanup * Comments / doc * More comments / doc * More comments / doc Fixed pre count duration. Added frequency restore after leaving * Prepare merge * Prepare merge * Finished merge * More comments and doc * Update ui_epirb_tx.cpp Fixed out of memory error when using AlphanumView * Update proc_epirb_tx.hpp Fixed comment * Fixed copilot PR comments. * Update proc_epirb_tx.hpp Fixed formatting * Update external.ld Merge with kiss_tnc app
PortaPack Mayhem
This is a fork of the Havoc firmware, which itself was a fork of the PortaPack firmware, an add-on for the HackRF. A fork is a derivate, in this case one that has extra features and fixes when compared to the older versions.
What is this?
If you are new to HackRF+PortaPack+Mayhem, check these:
Frequently Asked Questions
This repository expands upon the previous work by many people and aims to constantly add new features, bugfixes and generate documentation to make further development easier. Collaboration is always welcomed and appreciated.
What to buy?
✔️ The fabulous H4M complete or upgrade, featuring numerous improvements and accessories. Sold by our friends at OpenSourceSDRLab. Join their giveaways on discord (check the badge on top). EU customers can purchase via Lab401.
✔️ A recommended one is this PortaPack H2, that includes everything you need with the plastic case "inspired" on this.
✔️ Some individuals lean towards the H2 with a metal enclosure, but its advantages remain debated. Share your insights on our wiki.
⚠️ Be cautious , ask the seller about compatibility with the latest releases. Look out for the description of the item, if they provide the firmware files for an older version or they have custom setup instructions, this means it might be NOT compatible, for example:
⚠️ If it looks too different, this might mean that they are using their own recipe, check the different models in our wiki. For example all the H3 and clones of that version use their own version of the firmware. They do not contribute the changes back and eventually you will be left with a device that nobody maintains:
Where is the latest version?
The current stable release is on the page. Follow the instructions you can find in the release description. The latest (nightly) release can be found here.
How can I collaborate
You can write documentation, fix bugs and answer issues or add new functionality. Please check the following guide with details.
Consider that the hardware and firmware has been created and maintain by a lot of people, so always try collaborating your time and effort first. For coding related questions, if something does not fit as an issue, please join our Discord by clicking the chat badge on top.
To support the people behind the hardware, please buy a genuine HackRF and PortaPack.
What if I really want something specific?
If what you need can be relevant in general, you can request a feature. Alternatively, go to our Discord by clicking the chat badge on top and discuss there.
What if I need help?
First, check the documentation. If you find a bug or you think the problem is related to the current repository, please open an issue.
You can reach the official community in Facebook, and our Discord by clicking the chat badge on top.







