URGENT assignment help! Using Servo and Tone libraries.

I am creating a sensor device that utilises libraries (Servo, NewTone, NewPing, SoftwareSerial). I have researched everywhere on the internet, but nothing refers to my problem. I would like to use the Servo and NewTone libraries, though they get an error when I use them both. When I remove one of them the code works and vice versa with the other library.

The error code I get is:

"C:\Users\LeTran\AppData\Local\Temp\arduino_build_906327/..\arduino_cache_902643\core\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a" "-LC:\Users\LeTran\AppData\Local\Temp\arduino_build_906327" -lm
C:\Users\LeTran\AppData\Local\Temp\arduino_build_906327\libraries\NewTone\NewTone.cpp.o (symbol from plugin): In function `NewTone(unsigned char, unsigned long, unsigned long)':

(.text+0x0): multiple definition of `__vector_17'

C:\Users\LeTran\AppData\Local\Temp\arduino_build_906327\libraries\Servo\avr\Servo.cpp.o (symbol from plugin):(.text+0x0): first defined here

c:/program files (x86)/arduino/hardware/tools/avr/bin/../lib/gcc/avr/4.9.2/../../../../avr/bin/ld.exe: Disabling relaxation: it will not work with multiple definitions

collect2.exe: error: ld returned 1 exit status

Using library Servo at version 1.1.2 in folder: C:\Program Files (x86)\Arduino\libraries\Servo 
Using library NewTone in folder: C:\Users\LeTran\Documents\Arduino\libraries\NewTone (legacy)
Using library NewPing in folder: C:\Users\LeTran\Documents\Arduino\libraries\NewPing (legacy)
Using library SoftwareSerial at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SoftwareSerial 
exit status 1
Error compiling for board Arduino/Genuino Mega or Mega 2560.

The code I am using is:

#include <Servo.h>
#include <NewTone.h>
#include "NewPing.h"
#include "SoftwareSerial.h"

#define BT_SERIAL_TX 19
#define BT_SERIAL_RX 18

#define TRIGGER_PIN  10
#define ECHO_PIN     11
#define MAX_DISTANCE 400

SoftwareSerial BluetoothSerial(BT_SERIAL_TX, BT_SERIAL_RX);

char blueToothVal;           //value sent over via bluetooth
char lastValue;              //stores last state of device (on/off)

float duration, distance;

const int inputPin = 7;
const int ledPin = 4;
const int buzzerPin = 3;
const int buttonPin = 1;
const int buttonPinn = 0;

int pirState = LOW;
int lastpirState = 0;
int pirCounter = 0;
int iterations = 5;
int state = LOW;
int buttonState = HIGH;
int lastButtonState = HIGH;
int reading;
int btval = LOW;

int staten = LOW;
int buttonStaten = HIGH;
int lastButtonStaten = HIGH;
int readingn;

Servo My_servo;
int trig = 6;
int vcc = 7;
int gnd = 4;
int echo = 5;
float min_val = 0;
float ultra_distance[90] = {0};
int angle[91] = {0};

long lastDebounceTime = 0;  // the last time the output pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers

void setup() {
  My_servo.attach(9  , 600, 2300);
  pinMode(trig, OUTPUT);
  pinMode(gnd, OUTPUT);
  pinMode(vcc, OUTPUT);
  pinMode(echo, INPUT);
  digitalWrite(trig, LOW);
  digitalWrite(gnd, LOW);
  digitalWrite(vcc, HIGH);
  digitalWrite(echo, LOW);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(buttonPin, INPUT);
  pinMode(buttonPinn, INPUT);

void loop() {
  pirState = digitalRead(inputPin);

  {//if there is data being recieved
    blueToothVal=BluetoothSerial.read(); //read it
  if (blueToothVal=='n')
  {//if value from bluetooth serial is n
    btval == !btval;
    if (lastValue!='n'){
      BluetoothSerial.println("the min value ="); //print LED is on
  else if (blueToothVal=='f')
  {//if value from bluetooth serial is n
    btval == LOW;    
    if (lastValue!='f'){
      BluetoothSerial.println(F("Sweep is LOW"));}

  if (pirState != lastpirState) {
    if (pirState == HIGH) {
      BluetoothSerial.print("number of passes: ");
      if(state == HIGH){
        digitalWrite(ledPin, HIGH);
        BluetoothSerial.println("    LED on");
        if(state == LOW){
        digitalWrite(ledPin, LOW);
        BluetoothSerial.println("    LED off");
        if(staten == HIGH){
        NewTone(buzzerPin, 1000);
        BluetoothSerial.println("    Buzzer on");
        if(staten == LOW){
        NewTone(buzzerPin, 0);
        BluetoothSerial.println("    Buzzer off");
      while (digitalRead(inputPin) == HIGH) {
    } else {
      digitalWrite(ledPin, LOW);
      NewTone(buzzerPin, 0);
  lastpirState = pirState;


void ultrasonic () {
  duration = sonar.ping_median(iterations);
  // Determine distance from duration
  // Use 343 metres per second as speed of sound
  distance = (duration / 2) * 0.0343;
  // Send results to Serial Monitor
  BluetoothSerial.print("Distance = ");
  if (distance >= 400 || distance <= 2) {
    BluetoothSerial.println("Out of range");
  else {
    BluetoothSerial.println(" cm");

void button (){
    reading = digitalRead(buttonPin);
   if (reading != lastButtonState) {
      lastDebounceTime = millis();
      lastButtonState = reading;

   if ((millis() - lastDebounceTime) > debounceDelay) {
       if (buttonState != lastButtonState) {
           buttonState = lastButtonState;
           if (buttonState == HIGH) {
                 state = !state;

void buttonn (){
    readingn = digitalRead(buttonPinn);
   if (readingn != lastButtonStaten) {
      lastDebounceTime = millis();
      lastButtonStaten = readingn;

   if ((millis() - lastDebounceTime) > debounceDelay) {
       if (buttonStaten != lastButtonStaten) {
           buttonStaten = lastButtonStaten;
           if (buttonStaten == HIGH) {
                 staten = !staten;

void sweep(){
{ My_servo.write(0);
  int j = 0;
  int index = -2; // check index value

  for (int i = 0; i <= 100; i += 1)
    angle[j] = i;
    ultra_distance[j] = measure_distance_cm();
    j += 1;
    if (i == 90) {
  for (j = 0; j <= 90; j += 1)
  { min_val = max(min_val, ultra_distance[j]);


  for (j = 0; j <= 90; j += 1)
  { if (min_val > ultra_distance[j])
      min_val = ultra_distance[j];
      index = j;

  while (true)
    float new_val = 0;

    new_val = measure_distance_cm();
    if (abs(ultra_distance[index] - new_val) >= 2.0)
    { break;


  float measure_distance_cm(){
  float distance = 0;
  long time_value = 0;
  digitalWrite(trig, HIGH);
  digitalWrite(trig, LOW);
  time_value = pulseIn(echo, HIGH);
  distance = .034 * time_value / 2;
  return distance;

Servo and Tone libraries are probably both trying to use the same hardware timer of the chip.

What board are you using?

I am using the Arduino Mega 2560.

but nothing refers to my problem.

Baloney. This issue comes up at least once every couple of weeks on this forum alone. There are timer conflicts. You need to look at all the alternatives you have for tone, ping, and servo libraries and see what timers they use and pick two that use different timers. You get a bunch of timers on a Mega, it shouldn't be hard to find them.

Why in the world are you using SoftwareSerial on a Mega? It has 4 hardware serial ports. How many things are you talking to?

Oh, youre right, the software serial probably isnt needed. But, how do i check for the timers. Do I go into the each of the library's ___.h files? Do timers refer to pins on the board? How do I know which pins to use?

Oh, youre right, the software serial probably isnt needed.

So why would you be using it? There's one timer you just freed up.

But, how do i check for the timers. Do I go into the each of the library's ___.h files?

That would be one way. Some of them even have a few #defines at the beginning where you can choose a timer. Another way would be to read the documentation for the libraries and see if they mention which hardware resources like timers they use.

Do timers refer to pins on the board?

No, timers refer to the hardware timers in the chip. Each is connected to a couple of pins where it can be used to control PWM, but that's not what you're trying to use them for.

It sounds like you need to do a little studying on the Arduino and learn about the timers. Start here.

How do I know which pins to use?

Depends on the libraries you use. I would read the documentation for them. You really can't do anything in this hobby if you're not reading the instructions.

Thank you very much for the swift replies. I'l try to follow your instructions and then report back :p.

I've tried to understand the timers, and pins. Though, how do you make the servo or the NewTone library to use a different timer?

There is a servo library called ServoTimer2.h. Is that giving you any hints?


Is this assignment urgent because you left it too late to start your homework?


It was a group project and I had to cover for another person. I guess you could say I left it too late.

Assignment is over, but I'm still curious about how to do this.

I've tried to look into the .h and .cpp files. But j have had no luck. Tomorrow I'll look into comparing the servo and servo timer 2.

Though, the servo should be timer 5 since I'm using the arduino mega 2560. Which leads me to think it might not be the timer??

Literacy. If you don't know a term in a program then look it up until it makes logical sense or you have found a bug.

Do not skip over unknowns when troubleshooting.
Own the code or you can be trying to fix a problem by changing the wrong lines of code, write more bugs than you fix.

Google is your friend.