vscphlp_getRemoteVariableDouble

int vscphlp_getRemoteVariableDouble( long handle, const 
                                    char *pName, 
                                    double *value )

Parameters

handle

Handle for the communication channel obtained from a call to vscphlp_newsession.

pName

Pointer to a string containing the name of the variable. This name should have a character a-z as its first character and is not case sensitive.

value

Pointer to double variable that get the value of the string variable.

Return Value

Return VSCP_ERROR_SUCCESS on success, VSCP_ERROR_ERROR on failure. If the connection is closed VSCP_ERROR_CONNECTION is returned. VSCP_ERROR_PARAMETER is returned if called while in a receive loop.

Description

Get variable value from double variable.

Example

// Read a value from a float variable
double floatValue;
if ( VSCP_ERROR_SUCCESS == 
        ( rv = vscphlp_getRemoteVariableDouble( handle1, "test_float_variable", &floatValue ) ) ) {
    printf( "Command success: vscphlp_getRemoteVariableDouble on channel 1\n" );
    printf(" Value = %f\n", floatValue );
}
else {
    printf("\aCommand error: vscphlp_getRemoteVariableDouble on channel 1  Error code=%d\n", rv);
}

See Also

vscphlp_setRemoteVariableDouble


Very Simple Control Protocol
Wed Jul 04 2018 19:49:59 GMT+0000 (UTC)
This document is licensed under Creative Commons BY 4.0 and can be freely copied, redistributed, remixed, transformed, built upon as long as you give credits to the author((s).

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