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--- pm:prj2022:cstan:3 [2022/05/26 00:20]
david.botoghina [Hardware Design]
+++ pm:prj2022:cstan:3 [2022/06/02 13:17] (current)
david.botoghina [Hardware Design]
@@ Line 21: / Line 21: @@
   * 2x LEDs
   * 4x4 keypad
   * 1x LCD I2C
+  * Relay 5V
   * Some Wires
   * A fan
 __//**Electrical Schematic:**//__
-[[pm:prj2022:cstan:3|]]
+{{:pm:prj2022:cstan:captura_de_ecran_2022-06-01_201842.png?200|}}
 </note>
 ===== Software Design =====
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+#include <Keypad.h>
+#define Password_Length 8
+int signalPin = 12;
+int relay_pin = 10;
+char Data[Password_Length];
+char Master[Password_Length] = "123A456";
+byte data_count = 0, master_count = 0;
+bool Pass_is_good;
+char customKey;
+const byte ROWS = 4;
+const byte COLS = 4;
+char hexaKeys[ROWS][COLS] = {
+  {'1', '2', '3', 'A'},
+  {'4', '5', '6', 'B'},
+  {'7', '8', '9', 'C'},
+  {'*', '0', '#', 'D'}
+};
+byte rowPins[ROWS] = {9, 8, 7, 6};
+byte colPins[COLS] = {5, 4, 3, 2};
+Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+void setup(){
+  lcd.init();
+  lcd.backlight();
+  pinMode(signalPin, OUTPUT);
+  pinMode(13, OUTPUT);
+  pinMode(relay_pin, OUTPUT);
+}
+void loop(){
+  lcd.setCursor(0,0);
+  lcd.print("Enter Password:");
+  customKey = customKeypad.getKey();
+  if (customKey){
+    Data[data_count] = customKey;
+    lcd.setCursor(data_count,1);
+    lcd.print(Data[data_count]);
+    data_count++;
+    }
+  if(data_count == Password_Length-1){
+    lcd.clear();
+    if(!strcmp(Data, Master)){
+      lcd.print("Correct");
+      digitalWrite(signalPin, HIGH);
+      digitalWrite(13, HIGH);
+      delay(3000);
+      digitalWrite(signalPin, LOW);
+      digitalWrite(13, HIGH);
+      delay(3000);
+      digitalWrite(13, LOW);
+      }
+    else{
+      lcd.print("Incorrect");
+      digitalWrite(10, HIGH);
+      delay(1000);
+      digitalWrite(10, LOW);
+      }
+      lcd.clear();
+    clearData();
+  }
+}
+void clearData(){
+  while(data_count !=0){
+    Data[data_count--] = 0;
+  }
+  return;
+}
+How it works:
+The user needs to introduce a code, using the keyboard (the password). In the beginnig, on LCD is displayed the message "Enter Password", the password being composed by seven characters.
+If the introduced password is incorrect, then the message "Incorrect" is displayed on LCD and the green LED from the relay will turn off for one second.
+If the introduced password is correct, then on the display is displayed the message "Correct", and the fan will turn on.
 ===== Rezultate Obţinute =====
+{{:pm:prj2022:cstan:20220601_151524.jpg?200|}}
+{{:pm:prj2022:cstan:20220601_152150.jpg?200|}}
+{{:pm:prj2022:cstan:20220601_152655.jpg?200|}}
+{{:pm:prj2022:cstan:20220601_191234.jpg?200|}}
 ===== Concluzii =====
+It was an interesting project, that required several days. It also can be easily upgraded, for example, by adding something like a lamp or a lock at the output of the relay.
 ===== Download =====
+{{:pm:prj2022:cstan:pm_project.rar|}}
 ===== Jurnal =====
+/05/2022 - Hardware Assembly
+/05/2022 - Software
 ===== Bibliografie/Resurse =====
+github.com
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