Another message from the NanoVNA newsgroup. Hello Pluto, I have it converted under windows 10 with the DFUFileMgr.exe and added USB Device ID DF11. program with (MacOS or Linux): $ cd to file folder # place jumper on boot0 pins - REBOOT $ dfu-util -v -d 0483:df11 --alt 0 -D nanoVNA_0.1.0_ch.dfu # remove jumper - REBOOT 73, Rudi DL5FA ----------- Hello Andy, When you look what is online on USB you will see (nanoVNA): $ dfu-util -l ... Found DFU: [0483:df11] ver=2200, devnum=16, cfg=1, intf=0, path="20-1", alt=1, name="@Option Bytes /0x1FFFF800/01*016 e", serial="FFFFFFFEFFFF" Found DFU: [0483:df11] ver=2200, devnum=16, cfg=1, intf=0, path="20-1", alt=0, name="@Internal Flash /0x08000000/064*0002Kg", serial="FFFFFFFEFFFF" When flashing, you have to select alt=0, and USB ID 0483:df11. e.g. $ dfu-util -v -d 0483:df11 --alt 0 -D NanoVNA_with_scan_and_1500MHz_tinhead.dfu This worked on MacOS, but I am shure it will also work on Linux. 73, Rudi DL5FA