Aduino to Raspberry Pi Troubleshoot

please me figure out why raspberry pi 3 not appear receiving signal aduino.

i have connected promicroto raspberry pi 3.  wiring schematic attached.

aduino sending code

code: [select]

#include <rh_ask.h>
#include <spi.h> // not used needed compile

rh_ask driver(2000, 2, 14, 5);;

void setup()
{

    serial.begin(9600);   // debugging only
    if (!driver.init())
         serial.println("init failed");
}

void loop()
{
    serial.write("on");
    const char *msg = "hey world!";
    driver.send((uint8_t *)msg, strlen(msg));
    driver.waitpacketsent();
    delay(1000);
}

i getting random alternating current of less 3 volts ground pin 14 of promicro.

here rf sniffer code in raspberry pi:

code: [select]

/*
  rfsniffer

  usage: ./rfsniffer [<pulselength>]
  [] = optional

  hacked http://code.google.com/p/rc-switch/
  by @justy provide handy rf code sniffer
*/

#include "../rc-switch/rcswitch.h"
#include <stdlib.h>
#include <stdio.h>
    
    
rcswitch myswitch;
 


int main(int argc, char *argv[]) {
  
     // pin not first pin on rpi gpio header!
     // consult https://projects.drogon.net/raspberry-pi/wiringpi/pins/
     // more information.
     int pin = 2;
    
     if(wiringpisetup() == -1) {
       printf("wiringpisetup failed, exiting...");
       return 0;
     }

     int pulselength = 0;
     if (argv[1] != null) pulselength = atoi(argv[1]);

     myswitch = rcswitch();
     if (pulselength != 0) myswitch.setpulselength(pulselength);
     myswitch.enablereceive(pin);  // receiver on interrupt 0 => pin #2
    
    
     while(1) {
  
      if (myswitch.available()) {
    
        int value = myswitch.getreceivedvalue();
    
        if (value == 0) {
          printf("unknown encoding\n");
        } else {    
  
          printf("received %i\n", myswitch.getreceivedvalue() );
        }
    
        myswitch.resetavailable();
    
      }
      
  
  }

  exit(0);


}

the output raspberry pi looks rfsnifferresult attachment.

please me understand if raspberry pi not receiving signal or if aduino not sending signal.

i read that, default serial pins in rpi configured terminal login. 1 need free pins before using them.

here 1 of tutorial explaining it http://www.hobbytronics.co.uk/raspberry-pi-serial-port

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