RTOS: Packet Len on my CC1310

It's not clear from you code extract:

Do you change the

/* Packet TX Configuration */
#define PAYLOAD_LENGTH      30

In the rfPacketTx example?

Hi TER, I can't send you the code, because it is of my company. I attached here the capture of my port serial. In this moment the my communication accept 30 byte(15 characters), but if I send 20 byte (20 characters) I see two packet (see photo)

This is a part of communication: 

void Read_From_RF(char RFRead[MAX_LENGTH + NUM_APPENDED_BYTES - 4])
{
    uint8_t i;

    if (RFRead != NULL)								
	{
		for (i = 0; i < 4; i++) Addr_da_RF[i] = RFRead[i];					
   		for (i = 0; i < 4; i++)
   		{
   			if (Addr_da_RF[i] != MyAddr[i])
   	   		{
   	   			PIN_setOutputValue(pinHandle, S_ON,Out_Low);
   	   			for (i = 0; i < MAX_LENGTH; i++) From_RS232[i] = NULL;			
   	   			PIN_setOutputValue(pinHandle, S_ON,Out_High);
   	   			return;
   	   		}
   		}
		for (i = 4; i < MAX_LENGTH; i++) Dato_da_RF[i-4] = RFRead[i];	
   		Istruzioni(Dato_da_RF);								
		if (comando != 0) return;
		UART_write(uart, &Dato_da_RF, MAX_LENGTH);						
	}
}

void TX_To_RF(char To_Send[MAX_LENGTH])
{
	uint8_t i;
    rfcmdHandle = RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);
	if (PIN_getInputValue(Sel_Mod_Unmod) && To_Send[0] != 0)					
	{
		for (i = 0; i <4; i++) packet[i] = RemoteAddr[i];					
																		   
		for (i = 0; i <strlen(To_Send); i++) packet[i+4] = To_Send[i];
		RF_cmdPropTx.pPkt = packet;
		RF_cmdPropTx.pktLen = strlen(To_Send)+4;
		RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropTx, RF_PriorityNormal, NULL, 0);
	}
	if (!PIN_getInputValue(Sel_Mod_Unmod) && To_Send[0] != 0)					
	{
		RF_runCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);		
		RF_cmdTxTest.endTime = RF_getCurrentTime();								
		RF_cmdPropTx.pktLen = strlen(To_Send);
		RF_cmdTxTest.endTime = RF_getCurrentTime()+5000000;						
		RF_runCmd(rfHandle, (RF_Op*)&RF_cmdTxTest, RF_PriorityNormal, NULL, 0);	
	}
	RF_cancelCmd(rfHandle, rfcmdHandle, 0);
}

    if( RFQueue_defineQueue(&dataQueue,
                            rxDataEntryBuffer,
                            sizeof(rxDataEntryBuffer),
                            NUM_DATA_ENTRIES,
                            MAX_LENGTH + NUM_APPENDED_BYTES))
    {
        /* Failed to allocate space for all data entries */
        while(1);
    }

    /* Modify CMD_PROP_TX command for application needs */
    RF_cmdPropTx.pktLen = MAX_LENGTH;
    RF_cmdPropTx.pPkt = 0;
    RF_cmdPropTx.startTime = 0;


    /* Modify CMD_PROP_RX command for application needs */
    RF_cmdPropRx.pQueue = &dataQueue;           /* Set the Data Entity queue for received data */
    RF_cmdPropRx.rxConf.bAutoFlushIgnored = 1;  /* Discard ignored packets from Rx queue */
    RF_cmdPropRx.rxConf.bAutoFlushCrcErr = 1;   /* Discard packets with CRC error from Rx queue */
    RF_cmdPropRx.maxPktLen = MAX_LENGTH;        /* Implement packet length filtering to avoid PROP_ERROR_RXBUF */
    RF_cmdPropRx.pktConf.bRepeatOk = 1;
    RF_cmdPropRx.pktConf.bRepeatNok = 1;
    RF_cmdPropRx.startTrigger.triggerType = TRIG_ABSTIME;
    RF_cmdPropRx.endTrigger.triggerType = TRIG_ABSTIME;

Yes, I receive two packet on the serial output.

This is the RX packet on my code: 

    		UART_read(uart, &From_RS232, sizeof(From_RS232));			/* Read max 30 byte */
    		if (From_RS232[0] == 0) Read_Button_State();
    		else
    		{
    			PIN_setOutputValue(pinHandle, CTS,Out_High);
				Analyze_RS232_String(From_RS232);
				if (RS232_To_Local == 0) TX_To_RF(From_RS232);
				
				if (From_RS232[0] != 0)
				{
					for (i = 0; i < MAX_LENGTH; i++) From_RS232[i] = NULL;	
					for (i = 0; i < MAX_LENGTH+4; i++) packet[i] = NULL;	
					RF_cmdPropTx.pPkt = 0;
				}