Awa LWM2M C API (0.2.5)  
server-write-example.c

Create, process and free a basic Write request on a single resource.

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/*
* This example demonstrates how to set the value of a resource on a registered
* client with a WRITE operation.
*/
#include <stdlib.h>
#include <stdio.h>
#include <awa/common.h>
#include <awa/server.h>
#define IPC_PORT (54321)
#define IPC_ADDRESS "127.0.0.2"
#define OPERATION_PERFORM_TIMEOUT 1000
#define CLIENT_ID "TestClient1"
int main(void)
{
/* Create and initialise server session */
AwaServerSession * session = AwaServerSession_New();
/* Use default IPC configuration */
/* Create WRITE operation */
AwaServerWriteOperation * operation = AwaServerWriteOperation_New(session, AwaWriteMode_Update);
/*
* This example uses resource /3/0/15 which is the Timezone
* resource in the standard Device object. It is a string.
*/
/* Add the resource path and value to the WRITE operation */
AwaServerWriteOperation_AddValueAsCString(operation, "/3/0/15", "Pacific/Auckland");
AwaServerWriteOperation_Perform(operation, CLIENT_ID, OPERATION_PERFORM_TIMEOUT);
/* Operations must be freed after use */
return 0;
}