AML KDT750 Price Verification System - Manual (Page 24)

KDT750 APL Guide
4 - 2
Packet Format
To use APL over a TCP socket, the following general packet format is used:
NOTE: All wireless SECURITY settings are configured in the wifi.conf file described in Chapter 5.
General Payload Format
The payload of an APL TCP packet consists of 'ITEM=VALUE' pairs in readable ASCII format.
Multiple pairs can be in any given payload with each pair being separated by an ASCII
0x00 (NULL) character. For example, in a server response where the ITEM element
corresponds to a text field name and the VALUE element gives the text to display, a pay-
load containing two fields, one named “PRC” with the data “9.99” and one named “DES”
with the data “Flower Pot”, would look like the following:
Note that this example is of a payload only and does not contain the packet start and stop
characters.