Start and stop a loop using a momentary switch

Projects Programming
1

Hello,
For school i need to make a kind of windshield wiper system using a servo. The servo needs to turn to 180 degrees and back continuisly when a button is pressed once. But when i press the button again it needs to stop. Right now the script starts fine. the servo starts turning when i press the button but it won't turn off.
I think i need something like a loop function but i can't find anything that will help me.

3

Please post your code in a code block.

You are calling loop() from loop()! You should NEVER do that. This is called a recursive call and will crash your code eventually.

4

How can you see that ?
I don’t see any code !

5

this is the code i got so far

#include <Servo.h> // servo library adding
Servo ruitenwisser; // naming the servo
int sw1 = 7; // name the switch needed
int sw1State = 1; // name variables

int pos = 0; // make a variable for the servo

void setup() {
Serial.begin(9600);
ruitenwisser.attach(3); // connect the servo to pin 3
pinMode (sw1, INPUT_PULLUP); // make switch 1 a pullup input
}

void loop() {

//this part is the part where the trouble is.
sw1State = digitalRead(sw1);
if (sw1State == LOW) {
loop();
for (pos = 0; pos <= 180; pos += 1){ // gaat van 0 naar 180 graden in stappen van 4.1 graad
ruitenwisser.write(pos); // vertelt de servo om naar de positie te gaan
delay(15); // wacht 15ms voordat de motor terug gaat
}
for (pos = 180; pos >= 0; pos -= 1) { // gaat van 180 naar 0 graden in stappen van 4.1 graad
ruitenwisser.write(pos); // vertelt de servo om naar de positie te gaan
delay(15); // wacht 15ms voordat de motor terug gaat
}
}
}

this is the code i got so far:

This is the code i got so far

#include <Servo.h> // servo library adding
Servo ruitenwisser; // naming the servo
int sw1 = 7; // name the switch needed
int sw1State = 1; // name variables

int pos = 0; // make a variable for the servo

void setup() {
Serial.begin(9600);
ruitenwisser.attach(3); // connect the servo to pin 3
pinMode (sw1, INPUT_PULLUP); // make switch 1 a pullup input
}

void loop() {

//this part is the part where the trouble is.
sw1State = digitalRead(sw1);
if (sw1State == LOW) {
loop();
for (pos = 0; pos <= 180; pos += 1){ // gaat van 0 naar 180 graden in stappen van 4.1 graad
ruitenwisser.write(pos); // vertelt de servo om naar de positie te gaan
delay(15); // wacht 15ms voordat de motor terug gaat
}
for (pos = 180; pos >= 0; pos -= 1) { // gaat van 180 naar 0 graden in stappen van 4.1 graad
ruitenwisser.write(pos); // vertelt de servo om naar de positie te gaan
delay(15); // wacht 15ms voordat de motor terug gaat
}
}
}

6

You can convert the switches action to act like a push ON push OFF switch.

On a change in state to pushed, set a Flag, on the next push to ON you reset that Flag etc.

Use the Fag to enable the motor sweeping action.

7

Goedenavond aan Nederland
Hello snagkuul

Your comment "wacht 15ms voordat de motor terug gaat" is misleading.
That is the time between old positie to new positie.

Delete

loop();

and test again.

Geniet van de avond en heb plezier