Change:
[reader]
label = canaldigital
description = SERIAL READER
protocol = smargo
device = /dev/ttyUSB0
smargopatch = 1
caid = 0B00
detect = cd
mhz = 500
ident = 0B00:000000
group = 1
emmcache = 1,3,2
to
[reader]
label = canaldigital
description = SERIAL READER
protocol = smartreader
device = 011:011 for example, in console lsusb: Bus 001 Device 011: Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
smargopatch = 1
caid = 0B00
detect = cd
mhz = 500
ident = 0B00:000000
group = 1
emmcache = 1,3,2