受到 @"arwoon"#5947 和 @"SuperBart"#7001 的启发，编写了 DroidCP16 计划用来在 Android 上收发 CP16 报文。 Demo 支持的功能： - 发射 CP16 编码的文字（横向） TODO（a.k.a. 咕咕咕）： - 支持旋转文字方向； - 支持应用多种滤波器； - 支持 FFT 瀑布图； - 支持流式生成（不需要在发射前缓冲）； - 支持 AM32 调制。源代码（GPLv3）：https://codeberg.org/goodspeed/DroidCP16 Demo apk: https://codeberg.org/goodspeed/DroidCP16/releases/download/demo/app-release.apk [upl-image-preview uuid=45e88636-79a5-484c-a117-62b370cba89a url=https://storage.hamcq.cn/2025-11-20/1763653875-451860-img-20251120-234949.jpg alt={TEXT?}] [upl-image-preview uuid=8deff362-16d4-4a72-95e9-232778820d51 url=https://storage.hamcq.cn/2025-11-20/1763653875-726251-screenshot-20251120-233049-droidcp16.png alt={TEXT?}]

今天更新： - 修复了 @"arwoon"#p87725 提到的，字体渲染不正确的问题； - 支持字体旋转（以当前的横向为 0 度基准）。今天构建的安装包：https://codeberg.org/goodspeed/DroidCP16/releases/download/Nightly251122/app-release.apk [upl-image-preview uuid=fa817929-fdbf-4a00-8650-b74a5a103e7a url=https://storage.hamcq.cn/2025-11-22/1763820596-530554-img-20251122-220925.jpg alt={TEXT?}]

CP16：我居然还有第二春

这个是通过声卡输出音频的吗，如果是的话，是否可以直接用音频线接手台之类的发射？

@"BG5JKZ"#p87407 这个是通过手机音频输出的，可以接到手台或短波电台上发射。不过因为目前还没有瀑布图，所以建议找个带瀑布图的短波电台或者用外接 SDR 来接受。

刚刚下载到手机里打开试了一下界面。可以输入一段文字。请问这个可发送的文字是不是没有字数限制？

@"arwoon"#p87422 没有字数限制但有点性能问题，字多的话得等它生成一会，这块还得再优化优化。

汉字能转个90度就更好了，就不用旋转手机来看了。

@"[未知用户]"#p87631 咋感觉这个图里面的效果还差一些，字看不大清。。

DroidCP16 — CP16 Encoding Application for Android (Demo)

BI1XJT

Affected by @arwoon And @SuperBart Inspired by this, I developed the DroidCP16 project to handle CP16 messages on Android.

Features supported in the demo:

Transmit text encoded with CP16 (horizontally)

TODO (also known as "Gugu Gugu"):

Supports rotating the text direction.
Supports using multiple filters.
Supports waterfall charts based on FFT.
Supports streaming generation (without requiring buffering before transmission);
Supports AM32 modulation.

Source code (GPLv3):https://codeberg.org/goodspeed/DroidCP16
Demo APK: https://codeberg.org/goodspeed/DroidCP16/releases/download/demo/app-release.apk

BI3TTR

CP16: I still have a second spring ahead of me.

BG5JKZ

Is this using the sound card to output audio? If so, can I directly connect it to a transceiver with an audio cable?

BI1XJT

BG5JKZ This is achieved through audio output from a mobile phone, and can be connected to a radio or shortwave transmitter. However, since there is currently no waterfall display, it is recommended to find a shortwave radio with a waterfall display, or use an external SDR (Software Defined Radio) receiver.

arwoon

I just downloaded it and tried opening it on my phone. I can enter some text. Is there a character limit for the text that can be sent?

BI1XJT

arwoon There's no word limit, but there are some performance issues. If you use a lot of words, it might take a while for it to generate the text. This also needs further optimization.

BI1XJT

I wrote some more code today:

Improved sample generation speed;
The sample generation logic has been refactored, now allowing control of grayscale using amplitude for anti-aliasing.
A simple waterfall chart has been added.

Currently, the code supports both receiving and transmitting data. However, the current implementation of the waterfall chart is quite basic, and the coloring isn't very appealing. It still needs optimization. I tested it with an AIOC interface and a data cable, and after installing the software, I was able to successfully receive and transmit data. Thank you. @BD3ROR Sponsored by AIOC~ https://forum.hamcq.cn/d/6864

Installation package built today:https://codeberg.org/goodspeed/DroidCP16/releases/download/Nightly251121/app-release.apk

arwoon

It would be even better if the characters could rotate by 90 degrees, so I wouldn't have to turn my phone anymore.

YofoaStudio

Keep it up!

BI3TTR

[未知用户] I think the effect in this image is still not very good; the text is also difficult to read.

SuperBart

That's great! Let's publish it on F-Droid :)
I also plan to quickly build one using Flutter and Rust.

BI1XJT

SuperBart Once the first release is available, upload it to F-Droid. 😈

arwoon

The portion that was circled, both "在" and "里", are missing the final stroke. I'm not sure if other HAMs have also noticed this issue. I've tried setting various carrier intervals and line times, but it still doesn't work.

BI1XJT

今天更新：

修复了 arwoon 提到的，字体渲染不正确的问题；
支持字体旋转（以当前的横向为 0 度基准）。

今天构建的安装包：https://codeberg.org/goodspeed/DroidCP16/releases/download/Nightly251122/app-release.apk

BI4JJK

Upvote.

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