This is the Ham Radio All-in-one-Cable. It is currently in beta testing phase - Be wary! Please read this README carefully before ordering anything.

AIOC with Wouxun and Direwolf

What does it do?

The AIOC is a small adapter with a USB-C connector that enumerates itself as a sound-card (e.g. for APRS purposes), a virtual tty (“COM Port”) for programming and asserting the PTT (Push-To-Talk) as well as a CM108 compatible HID endpoint for CM108-style PTT (new in firmware version 1.2.0).

You can watch the videos of the Temporarily Offline and HAM RADIO DUDE YouTube channels below.

All In One Cable AIOC - Ham Nuggets Season 4 Episode 8 S04E08 Your BAOFENG Programming Cable Sucks! - Get This! - AIOC All in One Cable




Tested Radios (so far)

Future Work

Top side of PCB

How To Fab

This gives you 5 (or more) SMD assembled AIOC. The only thing left to do is soldering on the TRS connectors (see here). The total bill should be around 60$ US for 5 pieces plus tax and shipping from China.

How To Assemble

This is the process I use for building. See photographs in images folder.

How To Build

For building the firmware, clone the repository and initialize the submodules. Create an empty workspace with the STM32CubeIDE and import the project.

How To Program

Initial programming

The following steps are required for initial programming of the AIOC:

Firmware updating

Once the AIOC has firmware loaded onto it, it can be re-programmed without the above BOOT sequence by following these steps.

Note This requires firmware version >= 1.2.0. For older firmwares, the initial programming sequence above is required for updating the firmware.

This will reboot the AIOC into the bootloader automatically and perform the programming. After that, it automatically reboots the AIOC into the newly programmed firmware.

Note Should you find yourself with a bricked AIOC, use the initial programming sequence above

How To Use

The serial interface of the AIOC enumerates as a regular COM (Windows) or ttyACM port (Linux) and can be used as such for programming the radio as well as PTT (Asserted on DTR=1 and RTS=0).

Note before firmware version 1.2.0, PTT was asserted by DTR=1 (ignoring RTS) which caused problems with certain radios when using the serial port for programming the radio e.g. using CHIRP.

The soundcard interface of the AIOC gives access to the audio data channels. It has one mono microphone channel and one mono speaker channel and currently supports the following baudrates:

Since firmware version 1.2.0, a CM108 style PTT interface is available for public testing. This interface works in parallel to the COM-port PTT. Direwolf on Linux is confirmed working, please report any issues. Note that currently, Direwolf reports some warnings when using the CM108 PTT interface on the AIOC. While they are annoying, they are safe to ignore and require changes in the upstream direwolf sourcecode. See for more details.

Notes on Direwolf

Notes on APRSdroid

APRSdroid support has been added by AIOC by implementing support for the fixed 22050 Hz sample rate that APRSdroid requires. It is important to notice, that the exact sample rate can not be achieved by the hardware, due to the 8 MHz crystal. The actual sample rate used is 22052 Hz (which represents around 90 ppm of error). From my testing this does not seem to be a problem for APRS at all.

However, since APRSdroid does not have any PTT control, sending data is currently not possible using the AIOC except using the radio VOX function. See My previous experience is, that the Android kernel brings support for ttyACM devices (which is perfect for the AIOC) so implementing this feature for APRSdroid should theoretically be no problem.

Ideas such as implementing a digital-modes-spefic VOX-emulation to workaround this problem and let the AIOC activate the PTT automatically are currently being considered. Voice your opinion and ideas in the GitHub issues if this seems interesting to you.

Notes on CHIRP

CHIRP is a very popuplar open-source programming software that supports a very wide array of HT radios. You can use CHIRP just as you would like with a regular programming cable.