Weird behaviour after deleting/commenting code

Question

I've run into some weird behaviour and looks like I can't find an answer. I've written some simple code to control a servo motor via bluetooth using my phone.

#include <Servo.h>
#include "SoftwareSerial.h";

int servoPin = 2;

int bluetoothTx = 11;
int bluetoothRx = 10;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

Servo myservo;
char unChar;
String readString;

void setup() {

    Serial.begin(9600);
    bluetooth.begin(115200);
    delay(100);
    bluetooth.begin(9600);

    myservo.attach(servoPin, 800, 2200);

}

void loop() {

    if (bluetooth.available()) {
        unChar = bluetooth.read();
        Serial.println(unChar);

        if (unChar == 'A') {
            motor();
        }
    }
}

void motor() {
    delay(15);
    while (bluetooth.available()) {
        char c = bluetooth.read();
        readString += c;
    }
    if (readString.length() > 0) {
        Serial.println(readString.toInt());
        myservo.write(readString.toInt());
        readString = "";
    }
}

For android, I used the MIT App Inventor to make a basic slider.

I'm using an Arduino Mega 2560, Power HD High-Torque High-Voltage Digital Servo 1218TH and a Bluetooth Mate Silver RN-41.

Everything works fine with the exception of the servo stuttering while dragging the slider on the phone. That is one small problem. The weird behaviour appears when I comment or delete my code in the arduino loop. The servo still stutters on its place when I play with the slider. What causes this behaviour?

score 0 · Answer 1 · edited Jun 29 '16 at 12:04

0

Try to re-adjust the delay time after delete comment, it happens because add debug log inside the loop needs time to show up. In other words, that comment inside the loop has an impact on delay time.

edited Jun 29 '16 at 12:04

jdrake

333
4
17

answered Jun 25 '16 at 14:39

AFin

61
2

To what delay time are you referring? – mrklr Jun 26 '16 at 14:38
i mean you need to add the delay time inside loop method. – AFin Jun 27 '16 at 12:44

Weird behaviour after deleting/commenting code

1 Answers1