Connected via wifi.
Have installed drivers from Brother website.
sudo apt install sane-utils sane
- MFC-L3750CDW [ 192.168.15.3] MFC-L3750CDW
MFC-L5755DW [ 192.168.15.25] Brother_MFC-L5755DW_series
Scanner is recognised by "Document Scanner", starts to scan, preview appears, then gives popup with "Failed to scan. Unable to scan."
Repeated attempt to scan has Document Scanner giving "Failed to scan. Unable to connect to scanner."
EDIT: Further: Document Scanner, on opening searches for scanners.
ESCL Brother MFC-L3750CDW
ESCL Brother MFC-L5755DW
I can successfully scan with "Brother MFC-L3750CDW" but neither of the ESCL scanners.
And now "Document Scanner" is asking/demanding that I reply "Yes" to popup "There is an autosaved book available. Do you want to open it?"