Metrologic IS1000 Series Guia do Utilizador descarregar pdf (Página 141)

Chapter

BASIC

Commands

135

5. Other useful functions

There are other routines for obtaining additional information or setting control for a

connection.

(1) SOCKET_OPEN, SOCKET_HAS_DATA

To check the connection status by polling method.

(2) SOCKET_IP$

To get the networking configuration and the remote site IP address.

(3) TCPIP_ERR_CODE

To get the operation result after calling any TCPIP routines.

(4) TCPIP event trigger:

ON TCPIP GOSUB… and OFF TCPIP are used to get higher working performance.

Once the TCPIP event occurs, it is necessary for the application program to check

the trigger type by getting the value of the GET_TCPIP_MESSAGE routine.

6. Close a Connection

The NCLOSE routine is used to terminate a particular connection when the application

program does not use it any more.

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Metrologic IS1000 Series Guia do Utilizador Página 141