发的话目前CEC固件似乎已经实现了，不过接收似乎还没有....？查了一下设备使用的BK4819的文档，发现是可以支持afsk调制解调的，而且已经被实现的mdc1200本质上也和aprs一样是1200bps的afsk，只不过音调和数据内容不一样.... 或许通过适当的固件，真能把k5k6变成aprs机器...？如果不行的话，障碍有哪些呢？

CEC固件接收APRS也是可以的。硬件我用的是 BG7ZT 的外置款，来看图，我收到的消息： [upl-image-preview uuid=6abb34c4-7900-4083-a3d9-b4f09a4e5847 url=https://storage.hamcq.cn/2025-05-24/1748099154-303390-aprs.jpg alt={TEXT?}] 话说，上面的 @"BG5HHP"#6156 也是DIY达人呢。记录了一条PKT模式的通联log上传LoTW，不知是否正确。

@"Ken"#p66969 唔 cec固件的这个其实只是外置的解码器虽然他似乎还能支持ft8的解码....？因为cec固件是闭源的所以很难知道他具体是怎么实现的包括cec固件的ft8发射究竟是怎么实现用bk4819发射8fsk的...（按照公开资料理论上应该是只能发射2fsk....？所以不知道用bk4819内置的afsk调制解调器做aprs解码会遇到什么障碍quq 也许可以试试不过我不很会写代码所以可能要折腾很久....

@"BG5JFI"#p66986 [upl-image-preview uuid=3ea7787d-4b18-4cf6-9749-bb1c87c90287 url=https://storage.hamcq.cn/2025-05-25/1748153715-159033-img-8774.jpg alt={TEXT?}] 以上为BG7ZT的回复。

cec是闭源嘛？https://github.com/phdlee/uvk5cec 我记得之前是作者更新到0.2版本就停止更新了

@"5Breeze"#p67043 是的quq 原本说是等更到1.0就放出源码，结果跑路了）

求问最新的cec固件还是在GitHub上发布吗

不如直接一个nano pi接direwolf了

@"Felix"#p67051 已经不更新很久了。。。最新的是0.32

@"BI7KGD"#p67053 谢谢我看到https://github.com/phdlee/uvk5cec上最新tag是v0.3q，发布在2024年1月。还以为新版本换到其他地方发布了

Theoretically, can UVK5/K6 be used for APRS transmission and reception?

BG5JFI

The message I sent seems to be working with the current CEC firmware, but receiving it doesn't seem to be... ? I checked the documentation for the BK4819 device I'm using, and it supports AFSK modulation/demodulation. Also, the MDC1200 is essentially 1200bps AFSK, just like APRS, but with different frequencies and data content....

Perhaps with the right firmware, the K5K6 could actually be turned into an APRS device… If not, what are the obstacles?

Ken

Receiving CEC firmware via APRS is also possible. For the hardware, I'm using an external version of the BG7ZT. Here are the messages I received:

By the way, the above... @BG5HHP I'm also a DIY enthusiast. I recorded a PKT mode communication log using LoTW, but I'm not sure if it's correct.

BG5JFI

Ken This external decoder for the CEC firmware seems to only support decoding, although it might also be able to decode FT8... ?

Because the CEC firmware is closed-source, it's difficult to know exactly how it works. This includes understanding how the CEC firmware implements FT8 transmission, specifically how it achieves 8FSK transmission using the BK4819... (According to publicly available information, theoretically, it should only be able to transmit 2FSK...?

So, I'm not sure what obstacles I might encounter when using the AFSK demodulator built into the BK4819 to decode APRS data. Perhaps I could try it, but I'm not very good at coding, so it might take a while.

BA8AMF

Ken I'm new to APRS and I'm quite confused. Why doesn't the phone directly convert GPS location data into an audio digital signal for transmission, since there are no relevant software applications on the phone? Also, why is firmware installation required? It seems like it could be done in a similar way to FT8CN. Please explain.

BA8AMF

Ken I also checked the IGate2, and it seems that after enabling audio, you can achieve a similar communication mode to FT8CN. However, it's said that the effect might not be very good, so you might still need to buy a K-connector with a 3.5mm cable.

Ken

BG5JFI
The above is BG7ZT's reply.

5Breeze

Is CEC a closed-source project?https://github.com/phdlee/uvk5cec I remember that the author stopped updating after releasing version 0.2.

BG5JFI

5Breeze Yes, quq originally said they would release the source code once version 1.0 was released, but then disappeared.

Felix

Could you please tell me if the latest CEC firmware is released on GitHub?

BI7KGD

Felix It hasn't been updated for a long time... The latest version is 0.32.

BI7KGD

Instead, it would be better to directly connect a nano Pi to Direwolf.

Felix

BI7KGD

Thank you.

I saw that the latest tag on https://github.com/phdlee/uvk5cec is v0.3q, which was released in January 2024. I thought it had been released somewhere else instead.

BG7LJH

The latest version is 0.3V, with no major changes.
https://github.com/phdlee/uvk5cec/releases

------------ Version 0.3 Update Notes ------------
0.3V.zip

Optimizing WSJT-X transmission performance
Improved communication performance based on user feedback from testing.

Expandable FT8 frequency range
Compatible with mainstream FT8 bands:
▫ 28.000 MHz ~ 28.100 MHz
▫ 50.000 MHz ~ 50.330 MHz
▫ 144.100 MHz to 144.180 MHz
▫ 144.400 MHz ~ 144.500 MHz
▫ 432.000 MHz ~ 432.070 MHz

UV-K5 DigiManager upgraded to version 1.0

WSJT-X with UV-K5 frequency synchronization feature
⚠ IMPORTANT NOTE: You must manually select the communication mode (long press the menu button) before entering digital mode.
Due to the fact that WSJT-X does not automatically switch between device modes.

Instructions for Use
▶ Please download the 0.3V.zip file
▶ Using UK5DigManager allows you to run WSJT-X for FT8.

Upgrade recommendations
If you are currently using version 0.3 and do not require the FT8 functionality, you can choose not to update.

BloodBlade

BA8AMF

There are。
The firmware is easy to install.
There's no need for any reason to play.

BG5VLI

APRS Android can use aprsdroid, which supports both encoding and decoding. Flashing the firmware is done so that the decoded APRS information can be seen on the radio end, because no one wants to constantly hold their phone up to the microphone or plug in an audio cable to receive and decode the sound...

BA8AMF

BG5VLI To clarify, can I flash the firmware to install two different operating systems and switch between them at will? I've heard that some UVK6 devices have dual-system capabilities, but they seem to differ. Having a single firmware would be very convenient. If it could also support an external GPS module for transmitting data, that would be even better.

BA8AMF

BG5VLI https://forum.hamcq.cn/d/2107
I found a post; I'll check it out later.

BH2XIY

BA8AMF Isn't it enough for the K6 to support multiple systems?

BA8AMF

BA8AMF It seems unresolved; I'm confused.💀

BA8AMF

BH2XIY Yes, but I'm hesitant to disassemble and reflash it.

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