Aml KDT750 Price Verification System Instrukcja Użytkownika Pobierz pdf (Strona 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.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 40 41

Brak uwag

Aml KDT750 Price Verification System Instrukcja Użytkownika Strona 24