Bouffalo Lab will be shipping new versions of BL602 and BL604 with a different Embedded Flash...

https://gist.github.com/lupyuen/2cb2034a436dc75acc1aeb63ea3b9aa1

I think blflash will need to be updated. I shall study the changes to the new BLDevCube and figure out how to patch them into blflash. Will post my updates here thanks! 👍