Problem with Tone function with buzzer

Projects Programming
1

I am doing a project for measuring the water amount in a tub, whenever the water amount gets too low the buzzer will turn on and change tones to warn the user about the low water level, if the user wants to turn off the buzzer, he will use the remote control, there is also a LCD that displays the water value if it is "CRITICAL", "OK", or "excellent".

#include <IRremote.h>
#include <LiquidCrystal.h>

int waterP = A4; 
int waterV = 0;   // water sensor pin and value
int readT = 500;

int rs=9;
int en=7;
int d4=11;
int d5=10;   //LCD vars
int d6=8;
int d7=12;

int irP = 2;   


int buzP = 3;
int buzzsL = 255; //buzz vars
int buzzsS = 230;
LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

void setup() {
  // put your setup code here, to run once:
pinMode(waterP,INPUT); //water sensor config

Serial.begin(9600); //Serial config

lcd.begin(16,2); //LCD config

pinMode(buzP,OUTPUT); // buzzer config

IRrecv IR(irP);
decode_results cmd;   //IR pins & vars
String cmnd;
IR.enableIRIn(); // IR start

}

void loop() {
  // put your main code here, to run repeatedly:

waterV = analogRead(waterP);
Serial.print(waterV);   // water sensor value reading + print value

Serial.print("\n");
lcd.setCursor(0,0);
lcd.print("water level:");
if(waterV < 100){
	  tone(buzP,450); // Turn on buzzer
  	delay(200);
  	noTone(buzP); // Turn of buzzer
  	delay(300);
    lcd.clear();            // if water sensor reads less than 100, buzzer tunrs on
    lcd.setCursor(0,0);
    lcd.print("water level:");
    lcd.setCursor(0,2);
    lcd.print("CRITICAL!");
    waterV = analogRead(waterP);
    delay(readT);
}



if(waterV > 200){
    digitalWrite(buzP,0);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("water level:");
    lcd.setCursor(0,2);
    lcd.print("excellent!");
    waterV = analogRead(waterP);
    delay(readT);
}



}

But for some reason whenever I upload the code I get this error message

Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `__vector_7'
C:"my file place" (symbol from plugin):(.text+0x0): first defined here
collect2.exe: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1
2

something uses the same timer as the tone function

3

Such as what?

4

Most of my Arduino pins are hooked up, what should I do??

5

Look in your C:"my file place" folder. You might have two .INO files, and the compiler is trying to use both, causing the "multiple definition" error.

6

For me your code compiles just fine.
So easiest way would be to open a new sketch.
Save the sketch with a new name
delete all code from the fresh baremiminum code
copy paste your complete code into the editor-window and compile new

best regards Stefan

7

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