Getting useful Data from an web4robot i2c LCD into an Arduino.
I got the coolest Christmas present ever, and I am finally starting to do something with it!!!
#include < WString.h >
#include < Wire.h >
#include < LCDi2cW.h >
// Doing something slightly useful with the Aduino and my web4robot i2c LCD and 4×4 keypad
// Ken Terrell
#define VERSION “1.0b”
#define KEYPAD_BUTTON_1 1
#define KEYPAD_BUTTON_4 2
#define KEYPAD_BUTTON_7 3
#define KEYPAD_BUTTON_STAR 4
#define KEYPAD_BUTTON_2 5
#define KEYPAD_BUTTON_5 6
#define KEYPAD_BUTTON_8 7
#define KEYPAD_BUTTON_0 8
#define KEYPAD_BUTTON_3 9
#define KEYPAD_BUTTON_6 10
#define KEYPAD_BUTTON_9 11
#define KEYPAD_BUTTON_POUND 12
#define KEYPAD_BUTTON_A 13
#define KEYPAD_BUTTON_B 14
#define KEYPAD_BUTTON_C 15
#define KEYPAD_BUTTON_D 16
#define maxLength 8
LCDi2cW lcd = LCDi2cW(4,20,0×4C,0); // Number of lines and i2c address of the display
int lcdBacklight = 60;
char SecretCode[] = “1234″;
String Guess = String(maxLength);
char charGuess;
int keyInput = 0;
int ledPin = 12;
void setup()
{
Serial.begin(9600);
Serial.print(”Secret Code Box v”);
Serial.println(VERSION);
Serial.println(”");
Serial.println(”Written by Ken Terrell”);
Serial.println(”");
lcd.init(); // Init the display, clears the display
pinMode(ledPin, OUTPUT);
resetAll();
splashscreen();
mainscreen();
}
void loop()
{
charGuess = processKey(); //Get a keypress from the keypad if one is available.
if (charGuess) // We got one.
{
if (charGuess == ‘A’)
{ // End of Input, Check Results. Celebrate. Reset. and Redraw main screen.
if(checkResults()) //checkResults is TRUE if you guessed the secret.
{
celebrate();
}
resetAll();
mainscreen();
}
else if (Guess.length() < maxLength){
Guess.append(charGuess);
lcd.setCursor(2,Guess.length());
lcd.print('*');
}
while(processKey()) //Now we need to spin our wheels while until the user releases the key.
{ // do nothing in here just waiting on the user.
// delay(20); // if we need to throttle back the i2c bus usage.
}
}
}
int checkResults() //return a 1 if correct, a 0 if incorrect.
{
lcd.cursor_off();
lcd.blink_off();
lcd.clear();
lcd.print("Your Guess was :");
lcd.setCursor(1,0);
lcd.print(Guess);
lcd.setCursor(2,0);
if (Guess.equals(SecretCode)){
lcd.print("Congrats!");
return(1);
}
else {
lcd.print("Bummer....");
delay(3000);
return(0);
}
}
void celebrate()
{
for (int i=0; i<10; i++)
{
digitalWrite(ledPin, LOW);
lcd.setBacklight(255);
digitalWrite(ledPin, HIGH);
lcd.setBacklight(0);
}
}
void resetAll() //clear all strings and reset settings back to normal.
{
Guess = NULL;
digitalWrite(ledPin, LOW);
lcd.setBacklight(lcdBacklight);
lcd.cursor_off();
lcd.blink_off();
}
char processKey() // read character from keypad translate to correct letter and return it.
{
char pressed;
int localkey;
localkey=lcd.keypad();
switch(localkey){
case KEYPAD_BUTTON_1:
pressed = '1';
break;
case KEYPAD_BUTTON_2:
pressed = '2';
break;
case KEYPAD_BUTTON_3:
pressed = '3';
break;
case KEYPAD_BUTTON_4:
pressed = '4';
break;
case KEYPAD_BUTTON_5:
pressed = '5';
break;
case KEYPAD_BUTTON_6:
pressed = '6';
break;
case KEYPAD_BUTTON_7:
pressed = '7';
break;
case KEYPAD_BUTTON_8:
pressed = '8';
break;
case KEYPAD_BUTTON_9:
pressed = '9';
break;
case KEYPAD_BUTTON_0:
pressed = '0';
break;
case KEYPAD_BUTTON_A:
pressed = 'A';
break;
case KEYPAD_BUTTON_B:
pressed = 'B';
break;
case KEYPAD_BUTTON_C:
pressed = 'C';
break;
case KEYPAD_BUTTON_D:
pressed = 'D';
break;
case KEYPAD_BUTTON_STAR:
pressed = '*';
break;
case KEYPAD_BUTTON_POUND:
pressed = '#';
break;
}
return(pressed);
}
void splashscreen() {
lcd.setCursor(0,2);
lcd.print("Keypad Ver "); // Show Version
lcd.print(VERSION);
lcd.setCursor(3,0);
lcd.print("www.bloomingfool.net");
lcd.setCursor(1,4);
lcd.print("Ken Terrell");
delay(3000);
lcd.clear();
}
void mainscreen() {
beeper();
lcd.clear();
lcd.print("Enter the Secret!");
lcd.setCursor(1,0);
lcd.print("Then press 'A'.");
lcd.setCursor(2,0);
lcd.print("> “);
lcd.cursor_on();
lcd.blink_on();
lcd.setCursor(2,1);
}
void beeper()
{
digitalWrite(ledPin, HIGH);
delay(50);
digitalWrite(ledPin, LOW);
delay(50);
}
