compiling error

Projects Programming
3

herr kai;
Das ist the code
/********************************************************

  • PID Basic Example
  • Reading analog input 0 to control analog PWM output 3
    ********************************************************/

#include <PID_v1.h>

//Define Variables we'll be connecting to
double Setpoint, Input, Output;

//Specify the links and initial tuning parameters
PID myPID(&Input, &Output, &Setpoint,2,5,1, DIRECT);

void setup()
{
//initialize the variables we're linked to
Input = analogRead(0);
Setpoint = 100;

//turn the PID on
myPID.SetMode(AUTOMATIC);
}

void loop()
{
Input = analogRead(0);
myPID.Compute();
analogWrite(3,Output);
}
Danke :~