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Full Discussion: Writing to a Serial Port
Top Forums Web Development Writing to a Serial Port Post 302921713 by neutronscott on Sunday 19th of October 2014 09:08:19 PM
Old 10-19-2014
Is that a yes?

I looked at some weight protocols and you may need to send \r:

Code:
$ printf '\rW\n' >/dev/ttyS0
$ cat /dev/ttyS0

You should see a weight then. If so, and your permissions are correct, your PHP may work using \rW\n
 

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MP_SetPathWeight(3MPAPI)			   Common Multipath Management Library Functions			  MP_SetPathWeight(3MPAPI)

NAME
MP_SetPathWeight - set the weight of a path SYNOPSIS
cc [ flag... ] file... -lMPAPI [ library... ] #include <mpapi.h> MP_STATUS MP_SetPathWeight(MP_OID pathOid, MP_UINT32 weight); PARAMETERS
pathOid The object ID of the path logical unit. weight A weight that will be assigned to the path logical unit. DESCRIPTION
The MP_SetPathWeight() function sets the weight to be assigned to a particular path. RETURN VALUES
MP_STATUS_INVALID_OBJECT_TYPE The pathOid does not specify any valid object type. This is most likely to happen if an uninitialized object ID is passed to the API. MP_STATUS_OBJECT_NOT_FOUND The pathOid ownerID or object sequence number is invalid. MP_STATUS_INVALID_PARAMETER The pathOid has a type subfield other than MP_OBJECT_TYPE_PATH_LU, or when the weight parameter is greater than the plugin's maximum weight property. MP_STATUS_SUCCESS The operation is successful. MP_STATUS_FAILED The operation failed. MP_STATUS_UNSUPPORTED The driver does not support setting path weight. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard: ANSI INCITS 412 | | |Multipath Management API | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
libMPAPI(3LIB), attributes(5) Multipath Management API Version 1.0 SunOS 5.11 15 Feb 2006 MP_SetPathWeight(3MPAPI)
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