A
Arduino•4w ago
Patrick

Keyboard using keypad and keyboard libraries together

I am trying to make a keyboard script for an stm32 based development board using the keypad and keyboard libraries. I used a default script from the keypad library then added a keyboard function from the keyboard library to send keystrokes to the connected computer. My problem is that the script below does not send any keystrokes. I am able to send a key when I have a keyboard.write function alone, but not when it is inside that if statement. I can also send the pressed letter through serial (using an UNO, not the stm32 board as It doesn't connect to the serial monitor) so I know that the keypad script works alone. 
#include <Keyboard.h>
#include <Keypad.h>

const byte ROWS = 4; 
const byte COLS = 3; 

char hexaKeys[ROWS][COLS] = {
  {'A', 'B', 'C'},
  {'D', 'E', 'F'},
  {'G', 'H', 'I'},
  {'J', 'K', 'L'}
};

byte rowPins[ROWS] = {PA2, PA3, PA6, PB1}; 
byte colPins[COLS] = {PB11, PB14, A9};

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

void setup(){
  Serial.begin(9600);
  Keyboard.begin();
}
  
void loop(){
  char customKey = customKeypad.getKey();

  if (customKey){
    //Serial.println(customKey);
    Keyboard.write(customKey);
  }
}
#include <Keyboard.h>
#include <Keypad.h>

const byte ROWS = 4; 
const byte COLS = 3; 

char hexaKeys[ROWS][COLS] = {
  {'A', 'B', 'C'},
  {'D', 'E', 'F'},
  {'G', 'H', 'I'},
  {'J', 'K', 'L'}
};

byte rowPins[ROWS] = {PA2, PA3, PA6, PB1}; 
byte colPins[COLS] = {PB11, PB14, A9};

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

void setup(){
  Serial.begin(9600);
  Keyboard.begin();
}
  
void loop(){
  char customKey = customKeypad.getKey();

  if (customKey){
    //Serial.println(customKey);
    Keyboard.write(customKey);
  }
}
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