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arduino_key_pad.ino
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arduino_key_pad.ino
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//# Created by: Westley K
//# email: westley@sylabs.io
//# Date: Jul 10, 2018
//# Version-1.0
//# https://github.com/WestleyK/arduino-key-pad
/*
keypad conection diagram
1______2______3____row_0 to pin_5
| | |
| | |
4______5______6____row_1 to pin_6
| | |
| | |
7______8______9____row_2 to pin_7
| | |
| | |
*______0______#____row_3 to pin_8
| | |
| | |
col_0 col_1 col_2
pin_2 pin_3 pin_4
to arduino:
*/
float start1 = 0;
float end1 = 0;
float time1 = 0;
String pass_code1 = "";
String pass_code2 = "";
int pass_up = 0;
float start10 = 0;
int col_0 = 2;
int col_1 = 3;
int col_2 = 4;
int row_0 = 5;
int row_1 = 6;
int row_2 = 7;
int row_3 = 8;
void setup() {
Serial.begin(9600);
pinMode(col_0, OUTPUT);
pinMode(col_1, OUTPUT);
pinMode(col_2, OUTPUT);
digitalWrite(col_0, LOW);
digitalWrite(col_1, LOW);
digitalWrite(col_2, LOW);
pinMode(row_0, INPUT_PULLUP);
pinMode(row_1, INPUT_PULLUP);
pinMode(row_2, INPUT_PULLUP);
pinMode(row_3, INPUT_PULLUP);
}
char check_number() {
digitalWrite(col_0, LOW);
digitalWrite(col_1, HIGH);
digitalWrite(col_2, HIGH);
if (digitalRead(row_0) == LOW) {
delay(150);
while (digitalRead(row_0) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '1';
} else if (digitalRead(row_1) == LOW) {
delay(150);
while (digitalRead(row_1) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '4';
} else if (digitalRead(row_2) == LOW) {
delay(150);
while (digitalRead(row_2) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '7';
} else if (digitalRead(row_3) == LOW) {
delay(150);
while (digitalRead(row_3) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return 's'; // "s" stands for "*"
}
digitalWrite(col_0, HIGH);
digitalWrite(col_1, LOW);
digitalWrite(col_2, HIGH);
if (digitalRead(row_0) == LOW) {
delay(150);
while (digitalRead(row_0) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '2';
} else if (digitalRead(row_1) == LOW) {
delay(150);
while (digitalRead(row_1) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '5';
} else if (digitalRead(row_2) == LOW) {
delay(150);
while (digitalRead(row_2) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '8';
} else if (digitalRead(row_3) == LOW) {
delay(150);
while (digitalRead(row_3) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '0';
}
digitalWrite(col_0, HIGH);
digitalWrite(col_1, HIGH);
digitalWrite(col_2, LOW);
if (digitalRead(row_0) == LOW) {
delay(150);
while (digitalRead(row_0) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '3';
} else if (digitalRead(row_1) == LOW) {
delay(150);
while (digitalRead(row_1) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '6';
} else if (digitalRead(row_2) == LOW) {
delay(150);
while (digitalRead(row_2) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return '9';
} else if (digitalRead(row_3) == LOW) {
delay(150);
while (digitalRead(row_3) == LOW) {
if ((millis() - start10) >= 1000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
break;
}
}
pass_up = 1;
return 'n'; // "n" stands for "#"
}
digitalWrite(col_2, HIGH);
}
void key_pad_read() {
pass_code1 = check_number();
if (pass_up == 1) {
start10 = millis();
pass_code2 += pass_code1;
pass_up = 0;
}
Serial.println(pass_code2);
delay(100);
if (pass_code2 == "1234") {
//# when correct code is entered
code_true();
Serial.println("correct code inputed");
pass_code1 = "";
pass_code2 = "";
}
//# if code is more the 4 character, reset
if (pass_code2.length() >= 4) {
pass_code1 = "";
pass_code2 = "";
}
//# if there more than a 3 second wait between press, reset
if ((millis() - start10) >= 3000) {
pass_code1 = "";
pass_code2 = "";
pass_up = 0;
Serial.println("Your too slow");
}
}
//# do somthing when correct code is inputed
void code_true() {
Serial.println("correct input");
}
void loop() {
key_pad_read();
}