Clone working eMMC buildroot to 30 copies

I have one working buildroot rock pi 4. I have 30 or 40 new rock pi’s in a box and I need to make clones from the working unit. Anybody know how to do this? I lost my programmer and would be willing to pay for help.

This depends on Rock4 variant You have as well as requirements for Your project.
You may need to update:

  • SPI to same thing (if You need it and have it)
  • sd card/eMMC/M.2 drive with same system
  • system itself with new keys and identifiers (like ssh keys)

If it’s one time setup then just grab images from working unit and burn them to devices in box. If You plan to do that often You may consider devices like