Arduino Micro keyboard input not as expected

Using Arduino Project Guidance
#1

Hi

I've got a very simple sketch that sends a character to my PC.

The code is very simple -

#include "Keyboard.h"

void setup() {
Keyboard.begin();
}

void loop() {
delay(10000);
Keyboard.print("1");
}

I can see it appear in Notepad as expected.

However, I'd like it to work with a game so that I can control one action with a foot switch. It doesn't do what I want it to do, with occasional random inputs being seen in the game.

I still need to use the keyboard and mouse as well.

Any ideas where I'm going wrong ?

Thanks

#2

However, I'd like it to work with a game so that I can control one action with a foot switch. It doesn't do what I want it to do, with occasional random inputs being seen in the game.

Did you use the same code to test the game? Does react the game to a "1" input?

Any ideas where I'm going wrong ?

No, the information you supplied isn't sufficient.

#3

There's not a lot of information to go on but I suspect the the game will need the control to be held down, and Keyboard.print() doesn't do that - It sends a 'press' event and then immediately follows that with a 'release'

Have a look at using Keyboard.press() and Keyboard.release() instead.

Pseudo-code might be something like:

loop() {
   Check the physical state of the control (pressed/released)
   If the state now is different to the last time around then send press or release as required
   Record the new state
}

e2a: To test it you could do this:

#include "Keyboard.h"

void setup() {
  Keyboard.begin();
}

void loop() {
  Keyboard.press("1");
  delay(5000);
  Keyboard.release("1");
  delay(5000);
}

That will repeatedly hold down and then release the key for five seconds (each).

#4

pylon:
Did you use the same code to test the game? Does react the game to a "1" input?

No, the information you supplied isn't sufficient.

Yes, exactly the same code.

#5

Yes, exactly the same code.

So the problem is in your computer and not in the Arduino. It acts as a USB keyboard and sends a keycode for the 1 key (on standard keyboards, note not the 1 from the numeric block!) to the computer. If your game doesn't react to that it probably expects something else. We don't know what it expects.

#6

I had similar problems with my own project. The timing of the keypress seems to be important - not too short or too long.
Otherwise the character can get ignored or misinterpreted.
Also try adding a delay after Keyboard.begin();

#7