AML KDT750 Price Verification System - Manual (Page 40)

KDT750 User’s Guide
5 - 4
Some advanced features are not configurable with the utility and manual configuration of
the settings may be necessary by editing the wifi.conf configuration file. This file is a stan-
dard ASCII encoded text file that is readable and writable by any text editor. Empty lines
and lines starting with a # character will be ignored. The file begins with two mandatory
definition parameters that MUST be included in all wireless configuration files for the KDT750:
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1
This tells the wireless security supplicant how to set up the radio interface. The file then
includes a network block header that will be followed by all wireless network parameters
and security settings that should be used by the connection. A close brace '}' will follow the
parameters:
network={
<<>>
}
Multiple valid network blocks can be defined in the configuration file. The unit will try all
valid network blocks until the device is associated with an AP.
NOTE: Care should be taken when defining multiple network blocks because in some
configurations it is possible to associate with an AP but not be able to transmit or receive
data. In these cases, the unit will not know to move on to the next network block because
the radio sees a valid association with the AP.
Wireless Configuration Parameters
Inside a network block of the configuration file will be all the necessary parameters to con-
figure the interface.