Error for compiling for board Arduino Uno

Question

I am new to Arduino and just got this error after writing this code:The error message is pasted after the code. I am kindly requesting for assistance so that someone can help me understand why it isn't compiling. I even changed the board to mega at the tools section but still get the same error

 #include <Tone.h>
int ledred1 = 2;
int ledgreen1 = 3;
int ledorange1 = 4;
int ledred2 = 5;
int ledgreen2 = 6;
int ledorange2 = 7;
int ledred3 = 8;
int ledgreen3 = 9;
int ledorange3 = 10;
int sound = 250;
int trigPin1 = 11;
int echoPin1 = 12;
int trigPin2 = 13;
int echoPin2 = 14;
int trigPin3 = 15;
int echoPin3 = 16;
#define buzzer1 17
#define buzzer2 18
#define buzzer3 19
Tone tone1;
Tone tone2;
Tone tone3;
long distance1=0; 
long distance2=0;
long distance3=0; 
long t1=-10000;
long t2=-10000;
long t3=-10000;
void checkDistance(long distance, Tone toneobj, int frequency, long *timer);
long measure(int trigger, int echo);
void setup() {
 Serial.begin (9600);
 pinMode(trigPin1, OUTPUT);
 pinMode(echoPin1, INPUT);
 
 pinMode(trigPin2, OUTPUT);
 pinMode(echoPin2, INPUT);
 
 pinMode(trigPin3, OUTPUT);
 pinMode(echoPin3, INPUT);
 tone1.begin(buzzer1);
 tone2.begin(buzzer2);
 tone3.begin(buzzer3);
 
 pinMode(ledred1, OUTPUT);
 pinMode(ledred2, OUTPUT);
 pinMode(ledgreen1, OUTPUT);
 pinMode(ledgreen2, OUTPUT);
 pinMode(ledred3, OUTPUT);
 pinMode(ledgreen3, OUTPUT);
}
void firstsensor(){ // This function is for first sensor. 
 int duration1, distance1;
 digitalWrite (trigPin1, HIGH);
 delayMicroseconds (10);
 digitalWrite (trigPin1, LOW);
 duration1 = pulseIn (echoPin1, HIGH);
 distance1 = (duration1/2) / 29.1;
 Serial.print("1st Sensor: ");
 Serial.print(distance1); 
 Serial.print("cm ");
 if (distance1 <=200&& distance1>=100) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,HIGH);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=250;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance1 <100&& distance1>=50) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,HIGH);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=275;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance1 <50&& distance1>=0) { // Change the number for long or short distances.
 digitalWrite (ledred1, HIGH);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=300;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if(distance1>200 || distance1<0){
 Serial.println("Out of Range");
 noTone(buzzer1);
 }
 else{
 Serial.print(distance1);
 Serial.println("cm");
 tone(buzzer1,sound);
 } 
}
void secondsensor(){ // This function is for second sensor.
 int duration2, distance2;
 digitalWrite (trigPin2, HIGH);
 delayMicroseconds (10);
 digitalWrite (trigPin2, LOW);
 duration2 = pulseIn (echoPin2, HIGH);
 distance2 = (duration2/2) / 29.1;
 
 Serial.print("2nd Sensor: ");
 Serial.print(distance2); 
 Serial.print("cm ");
 
 if (distance2 <=200&& distance2>=100) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, HIGH);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=250;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance2 <100&& distance2>=50) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,HIGH);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=275;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance2 <50&& distance2>=0) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, HIGH);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=300;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if(distance2>200 || distance2<0){
 Serial.println("Out of Range");
 noTone(buzzer2);
 }
 else{
 Serial.print(distance2);
 Serial.println("cm");
 tone(buzzer2,sound);
 } 
}
void thirdsensor(){ // This function is for third sensor.
 int duration3, distance3;
 digitalWrite (trigPin3, HIGH);
 delayMicroseconds (10);
 digitalWrite (trigPin3, LOW);
 duration3 = pulseIn (echoPin3, HIGH);
 distance3 = (duration3/2) / 29.1;
 Serial.print("3rd Sensor: "); 
 Serial.print(distance3); 
 Serial.print("cm");
 
 if (distance3 <=200&& distance3>=100) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, HIGH);
 
 sound=250;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance3 <100&& distance3>=50) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,HIGH);
 digitalWrite (ledgreen3, LOW);
 
 sound=275;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if (distance1 <50&& distance1>=0) { // Change the number for long or short distances.
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 
 sound=300;
 } else {
 digitalWrite (ledred1, LOW);
 digitalWrite (ledgreen1,LOW);
 digitalWrite (ledorange1,LOW);
 digitalWrite (ledred2, LOW);
 digitalWrite (ledorange2,LOW);
 digitalWrite (ledgreen2, LOW);
 digitalWrite (ledred3, LOW);
 digitalWrite (ledorange3,LOW);
 digitalWrite (ledgreen3, LOW);
 } 
 if(distance3>200 || distance3<0){
 Serial.println("Out of Range");
 noTone(buzzer3);
 }
 else{
 Serial.print(distance3);
 Serial.println("cm");
 tone(buzzer3,sound);
 } 
}
void loop() {
Serial.println("\n");
firstsensor();
secondsensor();
thirdsensor();
delay(100);
}

This is the error message: Arduino: 1.8.13 (Linux), Board: "Arduino Uno"

Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer0_pin_port'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer0_pin_mask'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer1_pin_port'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer1_pin_mask'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer2_pin_port'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer2_pin_mask'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer0_toggle_count'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer1_toggle_count'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `timer2_toggle_count'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of `__vector_7'
libraries/Tone-1.0.0/Tone.cpp.o (symbol from plugin):(.text+0x0): first defined here
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Uno.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Answer 1

You include the Tone library and you use the tone() function from core. They are in conflict.

Use tone1.tone() or remove the Tone library and use the tone() function.

• Wayne 254: Thank you. I removed the tone library and used the tone () function by itself and it worked