Thanks for the info. I have other questions. in relation to the bootloader update, in the firmware folder that the seller gave me (0.31) there is only firmware.bin. When I tried 0.7.2 hwfly-nx also had the bootloader.bin file. Can I mix bootloader from 0.7.2 with firmware 0.31? And in relation to the reset of chip, is necessary to perform the reset (for data training?) ? And how to proceed to reset this specific hwfly lite 4.2? Thanks in advance.It can work with only sp1, but not on every switch. The special firmware was for hwflyV5. I don't know if it also works on another version. But it was slow. So better check your solder and use the standard firmware from your seller or hwfly-nx.