Hi all,
I'm using this keypad library:
http://playground.arduino.cc/Main/KeypadTutorial
It is used in a keycode alarm system:
- pressed keys are to be placed in an array
- input array is compared to passcode array
This library gives me the ascii value of the pressed key but what I want is the character to be placed into the input array.
For example:
- pressing button 1 returns 49
- pressing button 2 returns 50
- pressing button # returns 35
(complete program code at the end)
My arrays
//PASSCODE AND INPUT================================================
//Array that holds the correct passcode and array that holds input
int arrCode[] = {3, 3, 3, 1, 5};
int arrInput[] = {0, 0, 0, 0, 0};
From this library you can use:
//get key input
char key = keypad.getKey();
So then I want to put the pressed key into the array arrInput for comparison
//place the pressed key into arrInput at index indArray
arrInput[indArray] = key;
indArray++;
Now when I trace the contents of the array I see that instead of numbers, the ascii values are stored:
//TRACE:
int i;
for (i = 0; i < 5; i++) {
Serial.print(arrInput[i]);
}
Serial.println(" ");
//END TRACE
How do I handle this nicely ?
Yeah I could change my passcode array to:
//PASSCODE AND INPUT================================================
//Array that holds the correct passcode and array that holds input
//code is 55536
int arrCode[] = {53, 53, 53, 51, 54};
int arrInput[] = {0, 0, 0, 0, 0};
And this works. But it's not very convenient in programming
My complete code is this:
//include libraries
#include <Key.h>
#include <Keypad.h>
//Setup keypad
const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
byte rowPins[ROWS] = {12, 11, 10, 9}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {8, 7, 6}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
//PIN SETUP ==========================================
//PIR sensor
//#define pinPir 52 //the digital pin connected to the PIR sensor's output
////piezo buzzer
//#define piezoPin 48
//
#define ledGreen 4
#define ledRed 5
//PIR SENSOR VARS ===================================================
//the time we give the sensor to calibrate (30-60 secs for ADA-189)
int calibrationTime = 3;
//ARMED VAR =========================================================
//to indicate if system is armed or not : 0= not armed 1= armed
boolean blnArmed = true;
//PASSCODE AND INPUT================================================
//Array that holds the correct passcode and array that holds input
//code is 55536
int arrCode[] = {53, 53, 53, 51, 54};
int arrInput[] = {0, 0, 0, 0, 0};
// Index to determine where the input from the button should go into the array
int indArray = 0;
/////////////////////////////
//SETUP
void setup() {
Serial.begin(9600);
//setup pir sensor
// pinMode(pinPir, INPUT);
// digitalWrite(pinPir, LOW);
//setup leds
pinMode(ledGreen, OUTPUT);
pinMode(ledRed, OUTPUT);
digitalWrite(ledRed, HIGH);
digitalWrite(ledGreen, HIGH);
//setup armed mode
fncArm();
//give the sensor some time to calibrate
// Serial.print("calibrating sensor ");
// for (int i = 0; i < calibrationTime; i++) {
// Serial.println(calibrationTime - i);
// delay(1000);
// }
// Serial.println(" done");
// Serial.println("SENSOR ACTIVE");
// delay(50);
}
////////////////////////////
//LOOP
void loop() {
//get key input
char key = keypad.getKey();
//if "*" key is pressed the system wil be armed
if ( key == '*' && key != NO_KEY) {
fncArm();
}
//if the system is armed it should place the input into the array arrInput
//so that the input can be compared to the passcode
if (blnArmed && key != NO_KEY) {
//when the array index reaches 5 arrinput is set to 0,0,0,0,0
if ( indArray >= 5) {
fncClearArrInput();
}
//place the pressed key into arrInput at index indArray
arrInput[indArray] = key;
indArray++;
//TRACE:
int i;
for (i = 0; i < 5; i++) {
Serial.print(arrInput[i]);
}
Serial.println(" ");
//END TRACE
//compare arrInput to arrCode. If arrInput matches arrCode the system will be disarmed
if ( arrCode[0] == arrInput[0] && arrCode[1] == arrInput[1] && arrCode[2] == arrInput[2] && arrCode[3] == arrInput[3] && arrCode[4] == arrInput[4] ) {
fncDisarm();
}
}
if (blnArmed) {
digitalWrite(ledRed, HIGH);
digitalWrite(ledGreen, LOW);
} else {
digitalWrite(ledRed, LOW);
digitalWrite(ledGreen, HIGH);
}
// if (digitalRead(pinPir) == HIGH) {
// tone(piezoPin, 1000);
// }
//
// if (digitalRead(pinPir) == LOW) {
// noTone(piezoPin);
// }
} //END LOOP
//FUNCTIONS
//function to arm system
void fncArm() {
//when the system is armed arrInput should bet set to 0,0,0,0,0
fncClearArrInput();
//set bArmed to true
blnArmed = true;
//turn on red led
blnArmed = true;
}
//function to disarm system
void fncDisarm() {
//set bArmed to true
blnArmed = false;
}
//function to clear the arrInput
void fncClearArrInput() {
indArray = 0;
int i;
for (i = 0; i < 5; i = i + 1) {
arrInput[i] = 0;
}
}
