This is great news and the device looks promising. I wonder if rockbox[1] could be ported to it, but since Rockbox does not natively support Bluetooth or Wifi,

This is great news and the device looks promising. I wonder if rockbox[1] could be ported to it, but since Rockbox does not natively support Bluetooth or Wifi, it might be not the right firmware for this device. One thing I really miss on all NON iPod / NON Android devices is the ability to control playback via headphone remote[2]. I did a lot of research how to build such a thing myself and found out that it would be too much work to design a PCB that fits my needs and build a custom firmware for it with my skills. My personal approach would be much smaller, something about the size of the iPod Nano 7g. However, my conclusion also was, that an ESP32 is NOT the perfect chip for this[3] - more the Allwinner T113-S3 (discontinued) on the X-Boy-Plus[5] or the new ArtinChip D21x/D13x in the CyberPad 1[4]. My personal opinion is, that it is hard to build a custom device that has decent battery life, supports Wifi+Bluetooth, is still powerful enough to play all audio codecs and does not have a completely custom firmware that cannot be used in anything else but this device... Recently I found a promising article, where Flutter has been ported to run on a small RISC-V device[6], which would make at least the software development part a decent experience. For now, I'll stick with my iPod Nano 7g, as an alternative my Fiio M6 (discontinued, Android 7 with Custom App support). For more modern Apps I use the Unihertz Jelly 2e (Android 12), that has a custom media button, has an Audio Jack and is still available in shops today. Repair process is also ok and I think there also might be LineageOS Support. The apps I use are Substreamer[7] with Navidrome[8] and Audiobookshelf[9]. [1]: https://www.rockbox.org/ https://www.rockbox.org/ [2]: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/3640 https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/36... [3]: https://forums.rockbox.org/index.php/topic,54269.msg252243.html#msg252243 https://forums.rockbox.org/index.php/topic,54269.msg252243.h... [4]: https://mangopi.org/cp1m https://mangopi.org/cp1m [5]: https://github.com/hsinyuwang/X-Boyhttps://github.com/advplyr/audiobookshelf https://github.com/hsinyuwang/X-Boyhttps://github.com/advply... [6]: https://systemsdigest.com/videos/tiny-flutter-future-dart-flutter-small-devices https://systemsdigest.com/videos/tiny-flutter-future-dart-fl... [7]: https://substreamerapp.com/ https://substreamerapp.com/ [8]: https://www.navidrome.org/ https://www.navidrome.org/ [9]: https://github.com/advplyr/audiobookshelf https://github.com/advplyr/audiobookshelf