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  • Closing the port after a read or write operation
  • Using an external library: RXTX
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Stored procedures
Closes the specified serial port, parallel port or infrared port.
WEBDEV - Server code This function affects the server.
Reminder: A port must be closed as soon as it is no longer used.
Versions 16 and later
WINDEVJava This function is now available for the Java applications.
Java The management of infrared ports is not available in Java.
New in version 16
WINDEVJava This function is now available for the Java applications.
Java The management of infrared ports is not available in Java.
WINDEVJava This function is now available for the Java applications.
Java The management of infrared ports is not available in Java.
Example
Result1 is boolean
Result1 = sOpen(1, 2000, 2000) // Open COM1
IF Result1 = True THEN
// Configure COM1: Rate 9600, even parity,
// 8 data bits, 1 stop bit
sParameter(1, 9600, 1, 8, 0)
// Rest of process...
sClose(1) // Close COM1
ELSE
Error("Error while opening COM1")
END
Syntax
sClose(<Port Number>)
<Port Number>: Integer
Relevant port number:
  • Number of serial port: 1, 2, 3, ... 32 for COM1, COM2, COM3, ... COM32.
  • Number of parallel port: -1, -2, -3 or -4 for LPT1, LPT2, LPT3 or LPT4.
  • Number of infrared port: 1, 2, 3, ... 32 for IR1, IR2, IR3, ... IR32.
    Versions 16 and later
    Java The management of infrared ports is not available in Java.
    New in version 16
    Java The management of infrared ports is not available in Java.
    Java The management of infrared ports is not available in Java.
  • Port number returned by sOpen (if this function was called with a port name).
Remarks

Closing the port after a read or write operation

If sClose is run just after sWrite ou sRead, some characters may not be written or read. Indeed, sClose can close the port before all the characters are written or read. To avoid this behavior, use Multitask.
Res = sOpen(2, 2000, 2000)
IF Res THEN
        sParameter(2, 9600, 0, 8, 0)
        sWrite(2, Str)
        Multitask()
        sClose(2))
END
Versions 16 and later
Java

Using an external library: RXTX

In Java, the use of functions for handling the serial and parallel ports (sOpen, sWrite, sRead, ...) requires the presence of an external library: RXTX.
This library includes a Jar archive and one or more native libraries that depend on the operating system on which the application is run. To use these functions:
  • the Jar archive (RXTXComm.jar) must:
    • be found in the same directory as the Java application generated by WINDEV,
    • be found in the execution classpath of the application,
    • be directly included in the generated application (from the wizard for Java generation).
  • the native libraries corresponding to the operating system on which the application is run must be found:
    • in the same directory as the Java application generated by WINDEV,
    • in the path of the application libraries (librarypath).
The RXTX library and its documentation can be downloaded from: http://users.frii.com/jarvi/rxtx/index.html (link valid at the time this documentation was published).
Caution: The management of infrared ports is not available in Java.
New in version 16
Java

Using an external library: RXTX

In Java, the use of functions for handling the serial and parallel ports (sOpen, sWrite, sRead, ...) requires the presence of an external library: RXTX.
This library includes a Jar archive and one or more native libraries that depend on the operating system on which the application is run. To use these functions:
  • the Jar archive (RXTXComm.jar) must:
    • be found in the same directory as the Java application generated by WINDEV,
    • be found in the execution classpath of the application,
    • be directly included in the generated application (from the wizard for Java generation).
  • the native libraries corresponding to the operating system on which the application is run must be found:
    • in the same directory as the Java application generated by WINDEV,
    • in the path of the application libraries (librarypath).
The RXTX library and its documentation can be downloaded from: http://users.frii.com/jarvi/rxtx/index.html (link valid at the time this documentation was published).
Caution: The management of infrared ports is not available in Java.
Java

Using an external library: RXTX

In Java, the use of functions for handling the serial and parallel ports (sOpen, sWrite, sRead, ...) requires the presence of an external library: RXTX.
This library includes a Jar archive and one or more native libraries that depend on the operating system on which the application is run. To use these functions:
  • the Jar archive (RXTXComm.jar) must:
    • be found in the same directory as the Java application generated by WINDEV,
    • be found in the execution classpath of the application,
    • be directly included in the generated application (from the wizard for Java generation).
  • the native libraries corresponding to the operating system on which the application is run must be found:
    • in the same directory as the Java application generated by WINDEV,
    • in the path of the application libraries (librarypath).
The RXTX library and its documentation can be downloaded from: http://users.frii.com/jarvi/rxtx/index.html (link valid at the time this documentation was published).
Caution: The management of infrared ports is not available in Java.
Components
WINDEVWEBDEV - Server codeReports and Queries wd230com.dll
Windows Mobile wp230com.dll
Java wd230java.jar
Minimum required version
  • Version 9
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