Unlike the primary MCU image (typically denoted by .mcusw or .core ), which contains the kernel and essential system executables, the RPKG image functions as a container for the Read-Only Drive Z: resources—specifically pre-installed applications, multimedia assets, and system libraries that are not integral to the boot process but essential for the user interface.

Tiny Size: One square inch, easy to embed to devices.
OpenWrt: Easy to code; super stable, three years no reboot.
Low Cost: low cost, less than 1watt, unmatched performance.
Interfaces: Hardware support USB, Ethernet, SD, I2C, SPI etc.
OpenSource: Both software and hardware, totally FREE
Long Life: Keep production over 10 years, fast email support.
Unlike the primary MCU image (typically denoted by .mcusw or .core ), which contains the kernel and essential system executables, the RPKG image functions as a container for the Read-Only Drive Z: resources—specifically pre-installed applications, multimedia assets, and system libraries that are not integral to the boot process but essential for the user interface.