BIGTREETECH CB1 – A Raspberry Pi CM4 compatible Allwinner H616 system-on-module
When PI4B is used with the CB1, the CPU performance will be close to that of the Raspberry Pi 3B, but with compatibility with many of the accessories for the Raspberry Pi 4. If you wish to do so, you could also connect a Raspberry Pi CM4 to the PI4B adapter board. BIGTREETECH provides a Debian Linux for the CB1, and other operating systems are also in the works, but the company has not released public documentation for the board nor any OS images just yet. [Update: The OS image and Linux kernel source code can be found on GitHub]
The BIGTREETECH CB1 system-on-module can be purchased on Taobao in mainland China for about $19.9, and the complete package with the PI4B adapter goes for about $29.9. The company also has an Aliexpress store, but the CB1 is not listed yet. Let’s hope it will show up on Aliexpress in the near future. [Update: it can be purchased on the BQ store, see comments section]