Button brick example

I just recieved this brick from seeedstudio.com

And here is how you easily can get started using it…

//Define the values for your button brick, values can be found on the LCD after A:

#define btn1 176
#define btn2 402
#define btn3 766
#define btn4 950
#define btn5 1022

void setup()
{
  Serial.begin(9600); //Start serial communication for the LCD

  Serial.print("$CLEAR\r\n"); //Clear LCD
}

int pBtn(int input)
{
  int tolerance = 10; //This is to make up for changing resistance or voltage, this will allow ex. 176 to be down to 166 or up to 186, and still trigger as button 1

  int button = 0;

  if (input <= btn1 + tolerance && input >= btn1 - tolerance) button = 1;
  else if (input <= btn2 + tolerance && input >= btn2 - tolerance) button = 2;
  else if (input <= btn3 + tolerance && input >= btn3 - tolerance) button = 3;
  else if (input <= btn4 + tolerance && input >= btn4 - tolerance) button = 4;
  else if (input <= btn5 + tolerance && input >= btn5 - tolerance) button = 5;

  return button;
}

void loop()
{
  int btnIn = analogRead(1);

  Serial.print("$GO 1 1\r\n"); //Go to the top left corner
  Serial.print("$PRINT B: "); //Print a B:

  Serial.print(pBtn(btnIn)); //Ask the funciton for what button is pressed, based on the btnIn value from analog 1

  Serial.print("       \r\n"); //Make sure no old characters are left

  Serial.print("$GO 2 1\r\n"); //Go to line two
  Serial.print("$PRINT A: "); //Print an A:

  Serial.print(btnIn); //Print the btnIn value

  Serial.print("       \r\n"); //Make sure no old characters are left
}

Another test without the LCD, and just using Serial Monitor

//Define the values for your button brick, values can be found with the serial monitor Button: x (value)

#define btn1 176
#define btn2 402
#define btn3 766
#define btn4 950
#define btn5 1022

void setup()
{
  Serial.begin(9600);

  Serial.print("ADKey module example");
}

int pBtn(int input)
{
  int tolerance = 10; //This is to make up for changing resistance or voltage, this will allow ex. 176 to be down to 166 or up to 186, and still trigger as button 1

  int button = 0;

  if (input <= btn1 + tolerance && input >= btn1 - tolerance) button = 1;
  else if (input <= btn2 + tolerance && input >= btn2 - tolerance) button = 2;
  else if (input <= btn3 + tolerance && input >= btn3 - tolerance) button = 3;
  else if (input <= btn4 + tolerance && input >= btn4 - tolerance) button = 4;
  else if (input <= btn5 + tolerance && input >= btn5 - tolerance) button = 5;

  return button;
}

void loop()
{
  int btnIn = analogRead(1);

  Serial.print("Button: ");

  Serial.print(pBtn(btnIn)); //Ask the funciton for what button is pressed, based on the btnIn value from analog 1

  Serial.print(" ("); Serial.print(btnIn); Serial.println(")");

  delay(500);
}