Help! Keyboard library keeps getting errors

Using Arduino Interfacing w/ Software on the Computer
1

Hello all, I recently bought my first Arduino pro micro to make a make a macro pad for fusion360 shortcuts. But before that I tried to use the keyboard library and HID project library with a rotary encoder. In that code I tried to shift applications with moving rotary encoder right and left, but i seem to have gotten an error. How to correct this

#include "Keyboard.h"
#include "HID-Project.h"

// Rotary Encoder Inputs
#define inputCLK 1
#define inputDT 2
#define inputSW 3

int currentStateCLK;
int previousStateCLK; 
int mode = 1;
int maxMode = 4;

void changeMode() {
    mode = (mode % maxMode) + 1;
}

void setup() { 
  // Set encoder pins as inputs  
  pinMode (inputCLK,INPUT);
  pinMode (inputDT,INPUT);
  pinMode(inputSW, INPUT_PULLUP);

  // Setup Serial Monitor
  Serial.begin (9600);
  Consumer.begin();
  Keyboard.begin();

  // Read the initial state of inputCLK
  // Assign to previousStateCLK variable
  previousStateCLK = digitalRead(inputCLK);
} 

void loop() { 
  // Read the current state of inputCLK
  currentStateCLK = digitalRead(inputCLK);

  // If the previous and the current state of the inputCLK are different then a pulse has occured
  if (currentStateCLK != previousStateCLK){ 
    // If the inputDT state is different than the inputCLK state then 
    // the encoder is rotating counterclockwise
    if (digitalRead(inputDT) != currentStateCLK) { 
      rotateRight();
    } 
    else {
      rotateLeft();
    }
  } 
  // Update previousStateCLK with the current state
  previousStateCLK = currentStateCLK; 

        if(!digitalRead(inputSW)) {
            changeMode();
            delay(300);
        }
}
void rotateLeft() {
  switch(mode) {
    case 1:
      // Increase the volume.
      Consumer.write(MEDIA_VOLUME_UP);
      delay(500);
      break;
    case 2: 
      //Cltr + TAB
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press(KEY_TAB);
      Keyboard.releaseAll();
      delay(500);
      break;
      }
}
void rotateRight() {
  switch(mode) {
    case 1:
      // Decrease the volume.
      Consumer.write(MEDIA_VOLUME_DOWN);
      delay(500);
      break;
    case 2: 
      //Cltr + SHIFT + TAB
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press(KEY_LEFT_SHIFT);
      Keyboard.press(KEY_TAB);
      Keyboard.releaseAll();
      delay(500);
      break;
    }
}

After trying to compile the above code , I get the following error:-

In file included from C:\Users\Lenovo\Documents\Arduino\Rotary_Encoder_Multiplex\Rotary_Encoder_Multiplex.ino:1:0:
C:\Users\Lenovo\Documents\Arduino\libraries\Keyboard\src/Keyboard.h:54:27: error: expected identifier before numeric constant
 #define KEY_RETURN        0xB0
                           ^
e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\keyboardlayouts\improvedkeylayouts.h:103:5: note: in expansion of macro 'KEY_RETURN'
     KEY_RETURN          = 40, // Alias
     ^~~~~~~~~~
C:\Users\Lenovo\Documents\Arduino\libraries\Keyboard\src/Keyboard.h:54:27: error: expected '}' before numeric constant
 #define KEY_RETURN        0xB0
                           ^
e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\keyboardlayouts\improvedkeylayouts.h:103:5: note: in expansion of macro 'KEY_RETURN'
     KEY_RETURN          = 40, // Alias
     ^~~~~~~~~~
C:\Users\Lenovo\Documents\Arduino\libraries\Keyboard\src/Keyboard.h:54:27: error: expected unqualified-id before numeric constant
 #define KEY_RETURN        0xB0
                           ^
e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\keyboardlayouts\improvedkeylayouts.h:103:5: note: in expansion of macro 'KEY_RETURN'
     KEY_RETURN          = 40, // Alias
     ^~~~~~~~~~
In file included from e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\hid-apis\KeyboardAPI.h:29:0,
Multiple libraries were found for "Keyboard.h"
                 from e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\hid-apis\defaultkeyboardapi.h:27,
 Used: C:\Users\Lenovo\Documents\Arduino\libraries\Keyboard
 Not used: E:\Arduino IDE\arduino-1.8.19-windows\arduino-1.8.19\libraries\Keyboard
                 from E:\Arduino IDE\arduino-1.8.19-windows\arduino-1.8.19\libraries\HID_Project-2.8.4\src/SingleReport/BootKeyboard.h:30,
                 from E:\Arduino IDE\arduino-1.8.19-windows\arduino-1.8.19\libraries\HID_Project-2.8.4\src/HID-Project.h:50,
                 from C:\Users\Lenovo\Documents\Arduino\Rotary_Encoder_Multiplex\Rotary_Encoder_Multiplex.ino:2:
e:\arduino ide\arduino-1.8.19-windows\arduino-1.8.19\libraries\hid_project-2.8.4\src\keyboardlayouts\improvedkeylayouts.h:521:1: error: expected declaration before '}' token
 };
 ^
exit status 1

How can I correct this??

2

It appears that you've included two different libraries that both want to provide keyboard support. And the compiler is complaining because they both want to define the same constants.

I would imagine the solution will begin with getting rid of the #include "Keyboard.h" line and figuring out how to do keyboard input with the HID library. But that's just a guess.

1 Like
3

Thanks for the advice, will check it out

4

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