Hi community:

when i try to flash firmware images from https://ftp.osmocom.org/binaries/simtrace2/firmware/latest/simtrace-dfu-flash-latest.bin

simtrace2-sniff doesn't work.

sudo bossac --port=/dev/ttyACM0 --usb-port=1 --erase --verify --boot=1 --write simtrace-dfu-flash-latest.bin
Erase flash

Done in 0.013 seconds
Write 15880 bytes to flash (63 pages)
[==============================] 100% (63/63 pages)
Done in 0.604 seconds
Verify 15880 bytes of flash
[==============================] 100% (63/63 pages)
Verify successful
Done in 0.474 seconds
Set boot flash true

$ lsusb

Bus 003 Device 030: ID 1d50:60e3 OpenMoko, Inc.

$sudo ./simtrace2-list
USB matches: 1
1d50:60e3 Addr=30, Path=3-2, Cfg=2, Intf=0, Alt=0: 255/255/0 (0.7.0.60-859f)

$ sudo ./simtrace2-sniff
simtrace2-sniff - Phone-SIM card communication sniffer
(C) 2010-2017 by Harald Welte <laforge@gnumonks.org>
(C) 2018 by Kevin Redon <kredon@sysmocom.de>

No compatible USB devices found: Resource temporarily unavailable

sudo dfu-util --list
dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org

Found DFU: [1d50:60e3] ver=0000, devnum=30, cfg=1, intf=0, alt=2, name="not available", serial="51203120395134503230333139303033"
Found DFU: [1d50:60e3] ver=0000, devnum=30, cfg=1, intf=0, alt=1, name="Flash (Application Partition)", serial="51203120395134503230333139303033"
Found DFU: [1d50:60e3] ver=0000, devnum=30, cfg=1, intf=0, alt=0, name="RAM", serial="51203120395134503230333139303033"

What should I do?