hcitool Error: Set scan parameters failed: Operation not allowed
The reason behind this is due to the missing function of the Hictool tool and the lescan function needs to be supplemented
sudo apt-get install libcap2-bin sudo setcap 'cap_net_raw,cap_net_admin+eip' `which hcitool` getcap !$
Execute again at the time
hcitool -i hci1 lescan
It is found that it can be scanned normally.