# OpenRTX changelog

> Modular open-source firmware for handheld digital radios.

- Vendor: OpenRTX
- Category: Firmware
- Official site: https://openrtx.org
- Tracked by: What's New (https://whatsnew.fyi/product/openrtx)
- Harvested from: GitHub (OpenRTX/OpenRTX)
- Entries below: 10 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## Releases

### v0.4.4 — OpenRTX v0.4.4

- Date: 2026-05-01
- Version: v0.4.4
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.4.4
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.4.4
- Labels: Pre-release

- **added** — Support for on-screen QR code generation in graphics
- **added** — M17 metadata text transmission and reception
- **added** — M17 packet transmission and reception
- **added** — NVM driver for STM32 internal flash
- **added** — API for vibration motor control
- **added** — Noise reduction of microphone input via oversampling in codec2
- **added** — Use gcovr and catch2 for unit tests
- **added** — Increased power level granularity in UI
- **added** — AGENTS.md with project guidelines for AI agents
- **added** — CHANGELOG.rst
- **changed** — Optimized FIR filter implementation in core
- **changed** — Rename build_arm file to build_cm4
- **changed** — Reorganized NVM API and data structures
- **changed** — Optimized M17 CRC calculation routine
- **changed** — CS7000 Plus now uses VOX input for microphone input level
- **changed** — Adopt SPDX-compliant header
- **fixed** — Runtime bugs in Linux file_source module for audio
- **fixed** — Clipping in HR_Cx000 beep tone generator
- **fixed** — OPEN_DRAIN_PU setup mode in gpio_stm32
- **fixed** — Missing bound checking in repeater offset input in UI
- **fixed** — Wraparound on repeater offset entry in UI

Added
-----
- gfx: support for on-screen QR code generation
- M17: metadata text transmission and reception
- M17: packet transmission and reception
- NVM: driver for STM32 internal flash
- platform: API for vibration motor control
- codec2: noise reduction of mic input via oversampling
- test: use gcovr and catch2 for unit tests
- ui: increases power level granularity
- AGENTS.md with project guidelines for AI agents
- CHANGELOG.rst

Changed
-------
- core: optimized FIR filter implementation
- build: rename "build_arm" file to "build_cm4"
- NVM: reorganized API and data structures
- M17: optimized CRC calculation routine
- CS7000 Plus: use VOX input for microphone input level
- Adopt SPDX-compliant header

Fixed
-----
- audio: runtime bugs in Linux file_source module
- audio: clipping in HR_Cx000 "beep" tone generator
- gpio_stm32: fix OPEN_DRAIN_PU setup mode
- ui: missing bound checking in repeater offset input
- ui: wraparound on repeater offset entry

Thanks to
---------
- Jetse PA1JET
- Joshua VO1RFX
- Marco DM4RCO
- Morgan ON4MOD
- Ryan K0RET
- Ryan N2BP
- Roman VA1FOX
- Wojciech SP5WWP

### v0.4.3 — OpenRTX v0.4.3

- Date: 2025-12-15
- Version: v0.4.3
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.4.3
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.4.3
- Labels: Pre-release

- **fixed** — Fix long-standing issues in M17 demodulator code
- **added** — Add transmission of GNSS metadata in M17 voice streams
- **changed** — Update voice prompts

- Major improvements of M17 demodulator code, fixing long-standing issues
- Added transmission of GNSS metadata in M17 voice streams
- Updated voice prompts

Thanks to:

- Jim N1ADJ
- Ryan K0RET
- Rick KD0OSS
- Wojciech SP5WWP

### v0.4.2 — OpenRTX v0.4.2

- Date: 2025-10-05
- Version: v0.4.2
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.4.2
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.4.2
- Labels: Pre-release

- **changed** — Cleanup and update of platform tests
- **changed** — General refactoring of GPS drivers
- **added** — Enabled GPS on CS7000-M17 Plus
- **changed** — Started transitioning to new coding style
- **changed** — Replaced bin2sgl binary tool with a python script
- **added** — Added FM settings menu
- **changed** — Improved DC block filter implementation
- **changed** — Made settings entry for RTC sync with GPS persistent across reboots
- **changed** — Updated voice prompts data

- Cleanup and update of platform tests
- General refactoring of GPS drivers
- Enabled GPS on CS7000-M17 Plus
- Started transitioning to new coding style
- Replaced bin2sgl binary tool with a python script
- Added FM settings menu
- Improved DC block filter implementation
- Made settings entry for RTC sync with GPS persistent across reboots
- Updated voice prompts data

Thanks to:

- Grzegorz SP6HFE
- Imostlylurk
- JKI757
- Marco DM4RCO
- Peter OE5BPA
- Ryan K0RET
- Tarandeep VA1FOX

### v0.4.1 — OpenRTX v0.4.1

- Date: 2025-07-12
- Version: v0.4.1
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.4.1
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.4.1
- Labels: Pre-release

- **fixed** — Bug in MD-UV3x0 audio volume management
- **fixed** — Broken 1750Hz tone in MD-3x0
- **changed** — Improved computation of battery state of charge
- **added** — 1750Hz tone to CS7000-M17 and CS7000-M17 Plus
- **added** — Dockerfile, devcontainer and vscode tasks for all targets

Technical release solving display issues with new CS7000-M17 and CS7000-M17 Plus hardware.

- Fixed bug in MD-UV3x0 audio volume management
- Fixed broken 1750Hz tone in MD-3x0
- Improved computation of battery state of charge
- Added 1750Hz tone to CS7000-M17 and CS7000-M17 Plus
- Added Dockerfile, devcontainer and vscode tasks for all targets

Thanks to:
- Marco DM4RCO
- Morgan ON4MOD
- Peter OE5BPA

### v0.4.0 — OpenRTX v0.4.0

- Date: 2025-04-05
- Version: v0.4.0
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.4.0
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.4.0
- Labels: Pre-release

- **changed** — Refactored and reorganized MCU peripheral drivers
- **changed** — Refactored and reorganized NVM drivers
- **changed** — Use HR_C6000 as audio DAC on MD-UV3x0 devices
- **added** — Support for Connect Systems CS7000-M17
- **added** — Support for Connect Systems CS7000-M17 Plus
- **added** — Support for Baofeng DM-1701

- Refactored and reorganized MCU peripheral drivers
- Refactored and reorganized NVM drivers
- Using HR_C6000 as audio DAC on MD-UV3x0 devices
- Added support for Connect Systems CS7000-M17
- Added support for Connect Systems CS7000-M17 Plus
- Added support for Baofeng DM-1701

Thanks to:

- Alain
- Grzegorz SP6HFE
- Jim Ancona
- Lemielek
- Marco DM4RCO
- Marc HB9SSB
- Morgan ON4MOD
- Trriss
- Wojciech SP5WWP

### v0.3.7 — OpenRTX v0.3.7

- Date: 2024-07-14
- Version: v0.3.7
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.3.7
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.3.7
- Labels: Pre-release

- Fixed bug in AT1846S driver causing the output frequency to have an effective resolution of 1kHz instead of 62.5Hz.
- Made M17 destination callsign persistent across reboots
- Reorganized the nonvolatile memory interface
- Fixed missing transmission of the 1750Hz tone when keypad is locked
- M17: added callsign-based squelch for incoming transmissions
- Deeply restructured the M17 modulator, fixing the lock stability issues
- General code refactoring to reduce the size of the final binary images
- Removed usage of `float` from core sources
- Added string table for spanish language
- Added support for Module17 hardware revision 1.0

Thanks to:

- Derecho
- Edgetriggered
- Juan LW7EMN 
- Marco DM4RCO
- Morgan ON4MOD
- Ryan Turner

**Update 18/07/2024:** re-uploaded the binaries for MD-380 and MD-UV380 to fix a bug in the gpio driver causing the transmission to be out of frequency by ~2kHz.

### v0.3.6 — OpenRTX v0.3.6

- Date: 2023-10-20
- Version: v0.3.6
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.3.6
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.3.6
- Labels: Pre-release

- M17: implemented transmission of the EOT frame before closing a transmission.
- M17: showing stream info on screen during reception.
- M17: implemented check for CAN match in RX.
- Set up a dedicated UI for Module17.
- Added support for Module17 hardware revision 0.1e.
- Reorganized the audio path and audio stream subsystem.
- Corrected the conversion law for volume level in MDx devices.
- Added transmission of 1750Hz squelch tone to MDx and GDx.
- Added icons to UI.
- Added screen lock to radio UI.
- Support for a new target: Lilygo TTWR-plus.
- Bugfix and improvements.

Thanks to:
- Antonio Vasquez Blanco
- Edgetriggered
- Jason K5JAE
- Joshua DC7IA
- Marco DM4RCO
- Mathis DB9MAT
- Mike "tarxvf" W2FBI
- Ryan Turner
- Wojciech SP5WWP

### v0.3.5 — OpenRTX v0.3.5

- Date: 2022-11-11
- Version: v0.3.5
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.3.5
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.3.5
- Labels: Pre-release

Intermediate release bringing voice prompts for vision impaired hams on MD-3x0, MD-UV3x0 and Linux targets.
Thanks to Joe Stephen VK7JS for the development.

### v0.3.4 — OpenRTX v0.3.4

- Date: 2022-09-02
- Version: v0.3.4
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.3.4
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.3.4
- Labels: Pre-release

Intermediate technical release carrying bugfixes and improvements.

- Implemented the new OpenRTX CPS data format.
- Reorganized and reduced the firmware threads.
- Improved squelch mechanism for M17 mode to avoid random speaker activations in absence of an RF carrier.
- Fixed the oscillation of RF carrier at the first transmission after boot, thanks to Jacob KI5VMF.
- Fixed RX tone squelch bug on MD-UV380.
- Changed UI font from Free Sans to Ubuntu Regular, thanks to edgetriggered.
- Fixed various memory leaks.
- Reorganized linux emulator code.
- Moved to statically allocated framebuffer.
- Implemented linux input stream driver, thanks to Alain.

### v0.3.3 — OpenRTX v0.3.3

- Date: 2022-05-31
- Version: v0.3.3
- Original notes: https://github.com/OpenRTX/OpenRTX/releases/tag/v0.3.3
- Permalink: https://whatsnew.fyi/product/openrtx/releases/v0.3.3
- Labels: Pre-release

* Experimental support for M17 digital radio protocol, with thanks to Wojciech Kaczmarski SP5WWP and all the community.
    * Functional TX and RX of audio on MD-3x0 UHF devices.
    * Functional RX of audio on MD-3x0 VHF devices.
    * Functional TX and RX of audio on MD-UV3x0 devices.

* Support for a new target, Module 17, thanks to Mathis Schmieder DB9MAT.

* Persistence of user settings at power-off on MD-3x0 and MD-UV3x0.

* Build file and code adaptations to allow compilation and running of the emulator under Mac OS X, thanks to Alessio Caiazza IU5BON.

 * Automatic screen power-off with user-configurable timeout, thanks to Alessio Caiazza IU5BON.

* Menu entry allowing to reset user settings to their default state, thanks to Mike McGinty W2FBI.

* Experimental backup and restore of external flash via xmodem on MD-3x0 and MD-UV3x0.

* Various bug fixes and improvements.