User`s guide

Chapter

BASIC

Commands

133

Remarks

Note that the function must be called before using any socket read/write commands.

"N%" is an integer variable in the range of 0 to 3, indicating the connection number.

"IP$" is a string variable, indicating the IP address of the remote port. If it is set to

"0.0.0.0", the connection will become server mode and the LP% must be defined.

"RP%" is an integer variable, indicating the port number of the remote port, which

is to be connected. If it is 0 (=none), any remote port is available. However, it has to

be set to 0 when in server mode.

"LP%" is an integer variable, indicating the port number of the local port. If it is 0

(=none), the port number will be defined by the system. However, it has to be set to

0 when in client mode.

Server mode Client mode

N% 0 ~ 3 0 ~ 3

IP$ “0.0.0.0” Required

RP% 0 Required

LP% Required 0

"Protocol%" is an integer variable, indicating the networking protocol in use. This

parameter is optional and it is set to 0 by default (using TCP/IP protocol). If it is set

to 1, the system will use UDP/IP protocol.

"Delimiter%" is an integer variable, indicating whether to transmit the delimiter or

not. This parameter is optional and it is set to 0x0d (Carriage Return) by default.

The valid values range from 0 to 255. If it is set to -1, the system will not transmit

any delimiter.

Example

TCP_OPEN (0, "0.0.0.0", 0, 23)

TCP_OPEN (1, "0.0.0.0", 0, 24)

TCP_OPEN (2, "0.0.0.0", 0, 25, 1)

TCP_OPEN (3, "0.0.0.0", 0, 26, 0, 59)