Before using this sketch
This code uses Arduino's Keyboard.h library to send key presses from a compatible USB board. It generates keyboard events, not MIDI notes, so use it with an app or device that accepts keyboard input. The board must support native USB HID, such as an Arduino Leonardo or Micro; a standard Uno cannot run this keyboard path through its normal USB connection. See the Leonardo documentation and Arduino’s USB Keyboard reference.
The sketch reads several analog pins for pad triggers. Match the pin list to your board, and protect each microcontroller input from piezo voltage spikes with a suitable trigger circuit. A bleed resistor alone does not guarantee input protection. Test the hardware one pad at a time before connecting the full kit.
The original project video and sketch follow.
Arduino Mobile Octapad With Code
Arduino Code:
#include <Keyboard.h>
void setup(){
Keyboard.begin();
pinMode (10, INPUT_PULLUP);
pinMode (11, INPUT_PULLUP);
}
void loop() {
int c = analogRead(A0);
int d = analogRead(A1);
int e = analogRead(A2);
int f = analogRead(A3);
int g = analogRead(A4);
int h = analogRead(A5);
int i = analogRead(A6);
int j = analogRead(A7);
//8 pad selections------------------------------------------------------------
if(c>100){
Keyboard.print("q");
delay(10);
}
if(d>100){
Keyboard.print("w");
delay(10);
}
if(e>100){
Keyboard.print("e");
delay(10);
}
if(f>100){
Keyboard.print("r");
delay(10);
}
if(g>100){
Keyboard.print("s");
delay(10);
}
if(h>100){
Keyboard.print("d");
delay(10);
}
if(i>100){
Keyboard.print("u");
delay(10);
}
if(j>100){
Keyboard.print("x");
delay(10);
}
//Tone Selection Keys---------------------------------------------------------------------
if(!digitalRead(10)){
Keyboard.press(KEY_UP_ARROW);
delay(200);
} else if(!digitalRead(11)){
Keyboard.press(KEY_DOWN_ARROW);
delay(200);
}
Keyboard.releaseAll();
}
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void setup(){
Keyboard.begin();
pinMode (10, INPUT_PULLUP);
pinMode (11, INPUT_PULLUP);
}
void loop() {
int c = analogRead(A0);
int d = analogRead(A1);
int e = analogRead(A2);
int f = analogRead(A3);
int g = analogRead(A6);
int h = analogRead(A7);
int i = analogRead(A8);
int j = analogRead(A9);
//8 pad selections------------------------------------------------------------
if(c>800){
Keyboard.print("3");
delay(10);
}
if(d>800){
Keyboard.print("7");
delay(10);
}
if(e>800){
Keyboard.print("8");
delay(10);
}
if(f>800){
Keyboard.print("4");
delay(10);
}
if(g>800){
Keyboard.print("6");
delay(10);
}
if(h>800){
Keyboard.print("5");
delay(10);
}
if(i>800){
Keyboard.print("1");
delay(10);
}
if(j>800){
Keyboard.print("2");
delay(10);
}
//Tone Selection Keys--------------------------------------------------------------------
if(!digitalRead(10)){
Keyboard.press(KEY_UP_ARROW);
delay(200);
} else if(!digitalRead(11)){
Keyboard.press(KEY_DOWN_ARROW);
delay(200);
}
Keyboard.releaseAll();
}
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