Could not convert from void to bool

Projects Programming
1

I am getting this mistake: could not convert 'ServoRechts()' from 'void' to 'bool'

Can someone Help me?

This is my programm:

#include <HCSR04.h>


#include<Servo.h> //Bibliothek Sensor

Servo S1;

int a;

 

float distanceH;

 

const byte triggerPin = 13; //Trigger Pin - Sensor Front

const byte echoPin = 12; //Echo Pin - Sensor Front

UltraSonicDistanceSensor distanceSensor(triggerPin, echoPin); // Sensor vorne

 

const byte triggerPin2 = 44; //Trigger Pin - Sensor hinten

const byte echoPin2 = 42; //Echo Pin - Sensor hinten

UltraSonicDistanceSensor distanceSensor2(triggerPin2, echoPin2); // Sensor hinten

 

 

 

void setup() {

/*pinMode (11, INPUT_PULLOUT); // Taster Servo rechtskurve

pinMode (10, INPUT_PULLOUT); // Taster Servo linkskurve

pinMode (6, INPUT_PULLOUT); // Taster Servo gradeaus*/

pinMode(3, OUTPUT); //motor

pinMode(4, OUTPUT); //motor

pinMode(31, OUTPUT);//Lautsprecher 

pinMode(30, OUTPUT); //LED links

pinMode(32, OUTPUT); //LED rechts 

pinMode(9, OUTPUT); //Servo lenkung

S1.attach(9); //Servo

Serial.begin (9600);}

 

 

 

void loop() {

 

 

}

 

 

 

void ServoRechts(){

S1.write(15);}

 

void ServoLinks(){

S1.write(155);}

 

void Servogerade(){

S1.write(88);}

 

 

 

 

void Abstandsttone(){


}

 



/*void Bremslicht(){

  if()}*/

 

 

void SensorVorne(){ //Ultraschallsensor 1 vorne

float distance = distanceSensor.measureDistanceCm();

    Serial.println(distance);

    delay(500);}

 

void SensorHinten(){//Ultraschallsensor 2 hinten

float distanceH = distanceSensor2.measureDistanceCm();

    Serial.println(distanceH);

    delay(500);}


 




void vorfahren(){

digitalWrite (3,HIGH); //motor

digitalWrite (4,LOW);

delay (100);

digitalWrite (3,LOW);

digitalWrite (4,HIGH);

delay(5000);

digitalWrite (3,HIGH);

digitalWrite (4,HIGH);

delay(5000);}          //motor

 

void rueckfahren(){

digitalWrite (3,LOW); //motor

digitalWrite (4,HIGH);

delay(100);

digitalWrite (3,HIGH);

digitalWrite (4,LOW);

delay(5000);

digitalWrite (3,HIGH);

digitalWrite (4,HIGH);

delay(5000);}          //motor

 

 

 

 

void blinkenR(){

if(ServoRechts()){

  digitalWrite(32,HIGH);

  delay(100);

  digitalWrite(32,LOW);

  delay(100);

  digitalWrite(32,HIGH);

  delay(100);

  digitalWrite(32,LOW);}}


void blinkenL(){

  if(ServoLinks()){

  digitalWrite(30,HIGH);

  delay(100);

  digitalWrite(30,LOW);

  delay(100);

  digitalWrite(30,HIGH);

  delay(100);

  digitalWrite(30,LOW);}}


 

 



void StopV(){

Serial.println(distance);

if(distance<6){

  digitalWrite (3,LOW); //motor wird ausgemacht 

  digitalWrite (4,LOW);}}

 

void StopH(){

Serial.println(distance);

if(distance<6){

  digitalWrite (3,LOW); //motor wird ausgemacht 

  digitalWrite (4,LOW);}}
2

You can't test the return value a void function doesn't return.

(It would have been polite for you to post the actual error message, and its location)

3

it does nothing what can be used to determine what to return so it just returns true

bool ServoRechts() {
  S1.write(15);
  return true;
}
4

It writes to a servo.
That's not nothing.
It returns nothing

If you know it's going to return true, what's the point in testing?

5

it does nothing what can be used to determine what to return

6

your loop is empty, so not sure anything will happen...

what do you really want to test with

  if (ServoRechts()) {

or

  if (ServoLinks()) {

the function call (ServoRechts or ServoLinks) just asks the servo to go to a given position. What do you want to test?

7

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