Question

I am using Arduino and I need to integrate a servo motor and a relay together so that when the relay is on the servo motor goes to a 90 degree then when its closed it goes to 0 degrees. I am confused on the coding and need help with creating it. Thanks

Answer 1

#include <Servo.h>

Servo myservo;

const uint8_t servoPin = 9;
const uint8_t pumpPin = 2;

uint8_t pos = 0;
bool clockwise = true;

boolean pumpState = false;

unsigned long previousServoTime = 0;
unsigned long previousPumpTime = 0;
const unsigned long tick = 3000;
const unsigned long tack = 5000;
unsigned long pumpDelay = tick;

void setup()
{
myservo.attach( servoPin);
pinMode ( pumpPin, OUTPUT);
digitalWrite ( pumpPin, pumpState);
}

void loop()
{
unsigned long timeNow = millis();
if ( timeNow - previousServoTime >= 15)
{
myservo.write( pos);
( clockwise) ? pos++ : pos--;
if ( pos == 180 || pos == 0) clockwise != clockwise;
previousServoTime = timeNow;
}
if ( timeNow - previousPumpTime >= pumpDelay)
{
previousPumpTime = timeNow;
pumpState != pumpState;
pumpDelay = ( pumpDelay == tack) ? tick : tack;
digitalWrite ( pumpPin, pumpState);
}

}