servo motor working incorrectly

Question

I am making a car that is to be controlled by Android app through bluetooth. The problem that I am facing with servo motors is that before bluetooth module hc-05 gets connected to any bluetooth device, the servo motors rotate irrespective of whether it is connected or not.
Here's my arduino code for servo motors:

#include<Servo.h>
Servo servo1;
Servo servo2;
char val;
void setup()
{
  Serial.begin(9600);
  servo1.attach(5);
  servo2.attach(9);
}

void loop()
{
  if(Serial.available())
  {
    switch(Serial.read())
    {
      case 'F':
        servo1.write(180);
        servo2.write(180);
      break;
      case 'B':
        servo1.write(90);
        servo2.write(90);
      break;
    }
  }
}

I don't know why it' rotating. It's very frustating. Plz help. By the way the servo motors that I bought rotates only 180 degree.But I made it 360 degree by removing some part from inside. Plz help and correct me if my code is wrong.

Your code looks fine (tested here with one servo). Your modification to the motor is probably the issue. I think you want a continuous rotation servo. But I'm not an engineer. You might get a better answer at Arduino. — Johnny Mopp
Thank you very much Johnny Mopp for your advice. I'll try to test it with continuous rotation servo — Irfan Ansari

Lowder Lowder · Accepted Answer · 2017-03-01T15:24:06

0

votes

Try to add here:

switch(Serial.read())
- '0'`

Like here:

switch(Serial.read() - '0')

servo motor working incorrectly

1 Answers