ComRead()

Retrieves information from a serial device.

Syntax

ComRead([<cName>], [<nReceive>], [<cTerminator>], [<nTimeout>]) --> cReceiveString

Arguments

<cName> --> The optional name of the communications device to configure.

If you intend to open more than one serial communications device then you must specify a communications device name, e.g, "Weight Scale", "Cash Register", "Modem", "Serial Port 4", etc., in order to allow CAPITAL to distinguish between them.

<nReceive> --> An optional number of characters to receive.

<cTerminator> --> The character code to optionally wait for, which will terminate the read process.

<nTimeOut> --> An optional number of seconds to wait before the reading process is considered complete. If not specified the default wait period is 5 seconds.

Returns

The result of the read process returned as a character string value.

Description

Reads information from a serial communications device.

You must first set-up and open a communications device before you may write information to it, using the ComOpen() or ComSetup() functions.

Example

If ComOpen("My Device 1")

   If ComWrite("My Device1 ", "Hello")

      cResponse := ComRead("My Device")

   Endif

   ComClose("My Device")

Endif

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Related Topics

Business Function List

ComError()

ComOpen()

ComWrite()

ComSetup()

Weight Scale Interfacing Example: Digi D770