Simulating keyboard keypresses for a foot controlled keyboard extension.

Projects Programming
1

Here's the code that I found relevant for my project. When I verify this I get the error "'KEY_LEFT_CTRL' was not declared in this scope". I want to start testing out the code on my new arduino feather. Thanks for the help.

// use this option for OSX:
// char ctrlKey = KEY_LEFT_GUI;
// use this option for Windows and Linux:
char ctrlKey = KEY_LEFT_CTRL;  

void setup() {
  // make pin 2 an input and turn on the 
  // pullup resistor so it goes high unless
  // connected to ground:
  pinMode(2, INPUT_PULLUP);
  // initialize control over the keyboard:
  Keyboard.begin();
}

void loop() {
  while (digitalRead(2) == HIGH) {
    // do nothing until pin 2 goes low
    delay(500);
  }
  delay(1000);
  // new document:
  Keyboard.press(ctrlKey);
  Keyboard.press('n');
  delay(100);
  Keyboard.releaseAll();
  // wait for new window to open:
  delay(1000);
}
2

You're probably missing an include at the beginning of your code.

#include <somefile.h>

// other code here
...
...

where somefile.h is the file that contains the missing definitions; possibly Keyboard.h

Please edit your post and change the quote tags to code tags so your post looks like

your code here

Easier to read and easier to copy.

Question: which board are you using?

3

I added

#include <Keyboard.h>

Still get the same error.

I appreciate your response and fixed the formatting on my code as per your suggestion.

4

Thanks for editing the opening post..

Your compiles (after adding the include) if you select the correct board in the tools menu. I don't have boards that support HID but just picked a Leonardo and it compiled. Hence the question in my previous post which board you are using.

IDE 1.6.6 in case it is relevant.

5

Forgot that, I'm using the Feather. I have it set as an arduino uno.

And yeah, I'm using ide 1.6.11

6

Solved now? I only have Unos and it indeed did not compile :wink:

7

Still unsolved. here's the code I'm working with currently:

#include <Keyboard.h>
char ctrlKey = KEY_LEFT_CTRL;  

void setup() {
  // make pin 2 an input and turn on the 
  // pullup resistor so it goes high unless
  // connected to ground:
  pinMode(2, INPUT_PULLUP);
  // initialize control over the keyboard:
  Keyboard.begin();
}

void loop() {
  while (digitalRead(2) == HIGH) {
    // do nothing until pin 2 goes low
    delay(500);
  }
  delay(1000);
  // new document:
  Keyboard.press(ctrlKey);
  Keyboard.press('n');
  delay(100);
  Keyboard.releaseAll();
  // wait for new window to open:
  delay(1000);
}
8

No experience with Feathers; only thing I can say is to make sure that you pick the correct board from the toold menu (and as said, compiling for Uno will not work).

9

Thanks so much for your patience. After googling around a bit more, I found this:

I thought the board was covered under the uno, but I needed to install the feather. Solved!