Firmware Sunmi V2 -

Firmware version 2.1.4. Primary author: Priya K. Debug note left 2021-03-11: "If you’re reading this, the POS crashed. Run nand_rebuild -force. Then buy better flash memory."

Joko pulled up his own QR code on his phone. Rico scanned it. firmware sunmi v2

So, if you have a Sunmi V2 acting sluggish, the moral of the story holds true: Firmware version 2