Clash between Servo.h library and VirtualWire.h library

Projects Programming
1

I am making a project which controls a servo based on the data from the rf input.When I compile it (the program uses both the servo and virtual wire library) it shows the error:

Arduino: 1.6.4 (Windows 7), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"

Servo\avr\Servo.cpp.o: In function __vector_17': F:\Program Files\Arduino\libraries\Servo\src\avr/Servo.cpp:81: multiple definition of __vector_17'
VirtualWire\VirtualWire.cpp.o:C:\Users\Customer\Documents\Arduino\libraries\VirtualWire/VirtualWire.cpp:571: first defined here
f:/program files/arduino/hardware/tools/avr/bin/../lib/gcc/avr/4.8.1/../../../../avr/bin/ld.exe: Disabling relaxation: it will not work with multiple definitions
collect2.exe: error: ld returned 1 exit status
Error compiling.

Without the virtual wire library included, it does not show any error.What could have happened?

2

Try the ServoTimer2 library.

It is not unusual for Arduino libraries to fight with each other.

...R

3

Are all the functions and commands same?I took that they are same for both the servo and servotimer2 library and got the following errors while compiling:

Arduino: 1.6.4 (Windows 7), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"

In file included from rx.ino:3:0:
F:\Program Files\Arduino\libraries\ServoTimer2/ServoTimer2.h:41:17: error: conflicting declaration 'typedef uint8_t boolean'
typedef uint8_t boolean;
^
In file included from C:\Users\Customer\Documents\Arduino\libraries\VirtualWire/VirtualWire.h:146:0,
from rx.ino:1:
F:\Program Files\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:117:14: error: 'boolean' has a previous declaration as 'typedef bool boolean'
typedef bool boolean;
^
rx:10: error: 'Servo' does not name a type
rx:11: error: 'Servo' does not name a type
rx:12: error: 'Servo' does not name a type
rx:13: error: 'Servo' does not name a type
rx.ino: In function 'void setup()':
rx:27: error: 'servo1' was not declared in this scope
rx:28: error: 'servo2' was not declared in this scope
rx:29: error: 'servo3' was not declared in this scope
rx:30: error: 'servo4' was not declared in this scope
rx.ino: In function 'void loop()':
rx:62: error: 'servo1' was not declared in this scope
rx:67: error: 'servo2' was not declared in this scope
rx:72: error: 'servo3' was not declared in this scope
rx:77: error: 'servo4' was not declared in this scope
'Servo' does not name a type

This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.

4

Here is the code that I used:

#include <VirtualWire.h>

#include <ServoTimer2.h>

char input = A0;
int motorpin1 = 13;
int motorpin2 = 12;
Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4;
int x;
int reverse = 7;
int reverse2 = 6;

void setup() {
// put your setup code here, to run once:
pinMode(input,INPUT);
pinMode(motorpin1,OUTPUT);
pinMode(motorpin2,OUTPUT);
pinMode(reverse,OUTPUT);
servo1.attach(11);
servo2.attach(10);
servo3.attach(9);
servo4.attach(8);
pinMode(reverse2,OUTPUT);
Serial.begin(9600);

}

void loop() {
// put your main code here, to run repeatedly:
int final = analogRead(input);
if(final == 721)
{
digitalWrite(motorpin1,1);
digitalWrite(motorpin2,1);
}
else if(final == 722)
{
digitalWrite(motorpin1,1);
digitalWrite(reverse,1);
}
else if(final = 723)
{
digitalWrite(reverse2,1);
digitalWrite(motorpin2,1);
}
else if(final = 724)
{
digitalWrite(reverse2,HIGH);
digitalWrite(reverse,HIGH);
}
else if(final >= 0 && final <= 180)
{
servo1.write(final);
}
else if(final >= 181 && final <= 360)
{
x = map(final,181,360,0,180);
servo2.write(final);
}
else if(final >= 361 && final <= 540)
{
x = map(final,361,540,0,180);
servo3.write(x);
}
else if(final >= 541 && final <= 720)
{
x = map(final,541,720,0,180);
servo4.write(x);
}
else{}

}

5

If the libraries(servo and servo timer2) do not have the same functions,could you give me an example code?

6

There's an example folder in the library.

Looks to me as if these lines:

Servo servo1;
Servo servo2;
//etc

.... just need to become:

ServoTimer2 servo1;
ServoTimer2 servo2;
//etc

But I've never used it, so don't take my word for it without looking further.

Please use code tags: your code is so difficult to read... didn't you see the 8) in the middle that's supposed to be 8)?

7

Sorry.I am a beginner.I do not know how the emoticon came there.I tried what you told me,but it did not work.No offence intended.

8

Here is the error message that I get after doing what you told me.The number of error messages has decreased,but there is still one more.

Arduino: 1.6.4 (Windows 7), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"

In file included from rx.ino:3:0:
F:\Program Files\Arduino\libraries\ServoTimer2/ServoTimer2.h:41:17: error: conflicting declaration 'typedef uint8_t boolean'
typedef uint8_t boolean;
^
In file included from C:\Users\Customer\Documents\Arduino\libraries\VirtualWire/VirtualWire.h:146:0,
from rx.ino:1:
F:\Program Files\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:117:14: error: 'boolean' has a previous declaration as 'typedef bool boolean'
typedef bool boolean;
^
Error compiling.

This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.

9

Did you look at the example in the library folder?

The emoticon comes from there being this line in the code:

servo4.attach(8);

.... and the browser takes the 8) to be the 8). So you should select your code and hit the </> icon above the :slight_smile: to wrap it in [code][/code] tags so then your

code will
{
look
}
like this
10

KarthickAshwath:
F:\Program Files\Arduino\libraries\ServoTimer2/ServoTimer2.h:41:17: error: conflicting declaration 'typedef uint8_t boolean'
typedef uint8_t boolean;
^

I think this problem is due to your use of Arduino IDE 1.6.4. Unfortunately the Arduino folks are not good at backwards compatibility. There is probably a fix, but I don't know what it is.

A simple solution is to use Arduino IDE 1.5.6 - you can easily have a few different versions of the IDE on your PC.

...R

11

when i use ServoTimer2 header file without using VirtualWire it does not show any error but when i upload on board motor is not work so give me solution

12

maheshjsmr:
when i use ServoTimer2 header file without using VirtualWire it does not show any error but when i upload on board motor is not work so give me solution

Post your program so that we can see what you can see.
And please use the code button </> so your code looks like this and is easy to copy to a text editor

...R