Home assistant HUSBZB-1 fw update cheatsheet. SSH into your HA machine and then:
ha core stop
git clone https://github.com/walthowd/husbzb-firmware.git && cd husbzb-firmware
pip install pyserial
pip install xmodem
python3 ncp.py scan
python3 ncp.py flash -p /dev/ttyUSB1 -f ncp-uart-sw-6.7.8.ebl
python3 ncp.py scan
ha core start
ncp.py
scan hangs, so you'll need to ctrl-c. Once you do, it should tell you the current version running.