Serial Communication between CC13xx device

#include "contiki.h"
#include "dev/serial-line.h"
#include "dev/leds.h"
#include "dev/cc26xx-uart.h"
#include <stdio.h>
#include <stdint.h>

PROCESS(test_serial, "Serial line test process");
AUTOSTART_PROCESSES(&test_serial);
/*-------------------------------------------------------*/
PROCESS_THREAD(test_serial, ev, data){ 
PROCESS_BEGIN();
 
 printf("Wait\n");
 leds_on(LEDS_YELLOW);
 
 while(1){
	 PROCESS_WAIT_EVENT_UNTIL((ev==serial_line_input_byte));
     printf("Insert the character! \n");
 if(ev == 0) {
   printf("Led off!\n");
   leds_off(LEDS_YELLOW);
   ev=1;
   } else if(ev == 1) {
	   printf("Led on!\n");
	   leds_toggle(LEDS_YELLOW);
	   ev=0;
 }}
   PROCESS_END();
   }
 /*--------------------------------------------------------------------------*/