serial monitor issues

[CharlieJ]

This is a two part question, i have verified a motor shield code and it works in the arduino but when I try to look at the serial momitor its blank and this error code shows; stk500_get sync(): not in sync;resp=0x30. do I have two problems or are they related ? it shows com3 on the monitor screen and in the setup , a possible cable issue? Serial port is com 3. Thanks Charlie J

[Edit - moderator - Please use the 'code' button when submitting code]

Code: Select all

  #include <AFMotor.h>

AF_DCMotor motor1(3, MOTOR12_64KHZ);// create motor #2, 64KHz pwm
AF_DCMotor motor2(4,MOTOR12_64KHZ);
void setup() {
  Serial.begin(9600);           // set up Serial library at 9600 bps
  Serial.println("Motor test!");
 
  motor1.setSpeed(200);     // set the speed to 200/255
  motor2.setSpeed(200);
}

void loop() {
  Serial.print("Ahead");
 
  motor1.run(FORWARD);      // turn it on going forward
  motor2.run(FORWARD);
  delay(5000);
 
  Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(1000);
 
Serial.print("Turn");
  motor1.run(FORWARD);
  motor2.run(BACKWARD);
  delay(1500);
 
   Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(1000);
 
 
  motor1.run(FORWARD);      // turn it on going forward
  motor2.run(FORWARD);
  delay(5000);
 
   Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(1000);
 
  Serial.print("astern");
  motor1.run(BACKWARD);     // the other way
  motor2.run(BACKWARD);
  delay(4000);
 
  Serial.print("Stop");
  motor1.run(RELEASE);      // stopped
  motor2.run(RELEASE);
  delay(1000);
 
  Serial.print("Turn");
  motor1.run(FORWARD);
  motor2.run(BACKWARD);
  delay(1500);
 
  Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(2000);
 
   motor1.run(FORWARD);      // turn it on going forward
  motor2.run(FORWARD);
  delay(5000);
 
  Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(1000);
 
  Serial.print("TurnOpp");
  motor1.run(BACKWARD);
  motor2.run(FORWARD);
  delay(1500);
 
  Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(1000);
 
  motor1.run(FORWARD);      // turn it on going forward
  motor2.run(FORWARD);
  delay(5000);
 
  Serial.print("Stop");
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  delay(3000);
}

[adafruit_support_bill]

when I try to look at the serial momitor its blank and this error code shows; stk500_get sync(): not in sync;resp=0x30.

Where are you seeing that error code? In the serial monitor, or the diagnostic window at the bottom of the IDE? And does it show up only when you open the serial monitor?

A common cause of the serial monitor window showing garbage or nothing at all is if the baud-rate set differently than in your sketch. You sketch sets it to 9600 in "Serial.begin(9600);". Make sure that it is also set to 9600 in the serial monitor.

The error message you mention is typically seen when attempting to upload. But you are saying that the sketch is working, so your upload must have succeeded. Please clarify when and where you are seeing this message.

[CharlieJ]

The error code shows up after the upload in the bottom error screen after the line that says it compiled ok, while I am trying to see the monitor screen. Charlie J

[adafruit_support_bill]

The error code shows up after the upload in the bottom error screen after the line that says it compiled ok

So it compiled, but it did not upload. Double check that you have the correct COM port and Board type selected in the "Tools" menu. Verify that the COM port has not changed (sometimes this happens on Windows machines).

[franklin97355]

You caqn't have the serial monitor and the IDE trying to use the same com port at the same time, it just does not work in windows.

[CharlieJ]

In my previous post I did not know that the code did not uploadas it was a small change to the code. I was working with a bump switch and I have problems. So I tried the basic blink code and it did not load, and the error code" avrdude; stk500_getsync(); not in sync;reap=0x30"
This is in the error box at the bottom of page. I have rechecked the baub rate set 9600 as the baud rate of the serial monitor. Like I found out the basic blink did not load. I do not see both transmit and receive led's flashing. What did I do wrong Charlie J

[CharlieJ]

I think I just solved my problem the com port was incorrect. I had a little success. Thanks any way charlie J