Serial Monitor

Projects Programming
1

I am trying to control an led which uses arduino and the serial. How should I alter this code to make it so that when I enter a character the led goes on and when i enter a character again the led goes off?

int led = 13;
int led_state = 0;

void setup()
{

  pinMode(led,OUTPUT);
   Serial.begin(9600);

  digitalWrite(led,LOW);
}

void loop()
{


if (Serial.available()>0)    
  {

    if (digitalRead(led))

    {digitalWrite(led,!digitalRead(led));}

    digitalWrite(led,HIGH);


    Serial.flush();
   }
 }
2

I'd use a proper terminal emulator, like puTTY instead.
That way, you don't need to hit "send" every time you hit a key; it's sent automatically as soon as you press the key-

3

my issues are how do I code the arduino to do what I want. I am having an issue programming it to do what I want. that is why i provided the code.

4

So, you've already done one comparison to see if there's anything there to read.
So now read it into a variable and then compare what you read with a value .
Depending on which version of the IDE you have, the flush may not be doing what you think it is.