Smart Office Automation

1// Includes
2#include <SPI.h>
3#include <Wire.h>
4#include <MFRC522.h>
5#include <LiquidCrystal_I2C.h>
6#include <ESP8266WiFi.h>
7#include <WiFiClient.h>
8
9// Pin Definitions
10#define RST_PIN D3
11#define SS_PIN D4
12#define LED D8
13
14// RFID, LCD, and Network Setup
15MFRC522 mfrc522(SS_PIN, RST_PIN);
16MFRC522::MIFARE_Key key;
17LiquidCrystal_I2C lcd(0x27, 16, 4);
18
19// WiFi Credentials
20const char* ssid = "Arpit's Galaxy M14 5G";
21const char* password = "whsshcp77";
22
23// Server Settings
24const char* serverIP = "192.168.36.152"; // Change to your local server's IP
25const int serverPort = 80;                // Standard HTTP port
26
27// Block and Buffer
28int blockNum = 2;
29byte bufferLen = 18;
30byte readBlockData[18];
31
32void setup() {
33  Serial.begin(9600);
34  
35  // Initialize LCD
36  Wire.begin(D2, D1);
37  lcd.init();
38  lcd.backlight();
39  lcd.clear();
40  lcd.setCursor(0, 0);
41  lcd.print("Initializing...");
42  delay(2000);
43
44  // Connect to WiFi
45  WiFi.begin(ssid, password);
46  while (WiFi.status() != WL_CONNECTED) {
47    Serial.print(".");
48    delay(500);
49  }
50  Serial.println("\nWiFi connected.");
51  lcd.clear();
52  lcd.setCursor(0, 0);
53  lcd.print("WiFi Connected!");
54
55  pinMode(LED, OUTPUT);
56  SPI.begin();
57  mfrc522.PCD_Init();
58}
59
60void loop() {
61  lcd.clear();
62  lcd.setCursor(0, 0);
63  lcd.print("Scan your Card");
64
65  if (!mfrc522.PICC_IsNewCardPresent()) return;
66  if (!mfrc522.PICC_ReadCardSerial()) return;
67
68  ReadDataFromBlock(blockNum, readBlockData);
69  
70  lcd.clear();
71  lcd.setCursor(0, 0);
72  String name = String((char*)readBlockData);
73  if (name=="2240135") {
74    lcd.print("Hello, Pallavi");
75  } else if (name=="2240153") {
76    lcd.print("Hello, Velan");
77  } else if (name=="2240155") {
78    lcd.print("Hello, Sahil");
79  } else if (name=="2240156") {
80    lcd.print("Hello, Arpit");
81  } else {
82    lcd.print("Invalid User");
83  }
84
85  digitalWrite(LED, HIGH);
86  delay(500);
87  digitalWrite(LED, LOW);
88
89  sendAttendanceData((char*)readBlockData);
90
91  // *Fix: Halt the RFID reader properly*
92  mfrc522.PICC_HaltA();       
93  mfrc522.PCD_StopCrypto1();  
94  Serial.println("RFID scan halted, ready for next card...");
95
96  delay(3000); // Allow time before scanning a new card
97}
98
99void sendAttendanceData(String cardName) {
100  WiFiClient client;
101
102  Serial.print("Connecting to server: ");
103  Serial.print(serverIP);
104  Serial.print(":");
105  Serial.println(serverPort);
106
107  if (client.connect(serverIP, serverPort)) {
108    Serial.println("Connected to server.");
109
110    // HTTP Request
111    String url = "/Smart_office/rfid_login.php?user_id=" + cardName;
112    
113    client.print("GET " + url + " HTTP/1.1\r\n");
114    client.print("Host: " + String(serverIP) + "\r\n");
115    client.print("Connection: close\r\n\r\n");
116
117    delay(500); // Give server time to respond
118
119    // Read response
120    while (client.available()) {
121      String line = client.readStringUntil('\r');
122      Serial.print(line);
123    }
124
125    Serial.println("\nRequest complete.");
126    client.stop();
127  } else {
128    Serial.println("Connection to server failed.");
129  }
130}
131
132void ReadDataFromBlock(int blockNum, byte readBlockData[]) {
133  for (byte i = 0; i < 6; i++) {
134    key.keyByte[i] = 0xFF;
135  }
136
137  MFRC522::StatusCode status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, blockNum, &key, &(mfrc522.uid));
138  if (status != MFRC522::STATUS_OK) {
139    Serial.println("Authentication failed.");
140    return;
141  }
142
143  status = mfrc522.MIFARE_Read(blockNum, readBlockData, &bufferLen);
144  if (status != MFRC522::STATUS_OK) {
145    Serial.println("Read failed.");
146  } else {
147    Serial.println("Data read successfully.");
148  }
149}

1#define PIN1 4  // FAN
2#define PIN2 5  
3#define PIN3 6  
4#define PIN4 7  // BULB (Controlled by PIR and Manual)
5#define PIR_PIN 8  // PIR Sensor Input Pin
6
7#include <SoftwareSerial.h>
8
9bool pirActivated = false;  
10bool manualOverride = false; // Track if manual override is ON
11
12SoftwareSerial espSerial(9, 10); 
13
14void setup() {
15    pinMode(PIN1, OUTPUT);
16    pinMode(PIN2, OUTPUT);
17    pinMode(PIN3, OUTPUT);
18    pinMode(PIN4, OUTPUT);
19    pinMode(PIR_PIN, INPUT);
20    
21    espSerial.begin(9600);
22    Serial.begin(9600);
23
24    // Initialize all devices OFF (for Active LOW relay, HIGH = OFF)
25    digitalWrite(PIN1, HIGH);
26    digitalWrite(PIN2, HIGH);
27    digitalWrite(PIN3, HIGH);
28    digitalWrite(PIN4, HIGH);
29}
30
31void loop() {
32    int motion = digitalRead(PIR_PIN);
33
34    // PIR should only control PIN4 if not manually overridden
35    if (motion == HIGH && !manualOverride) {  
36        Serial.println("Motion detected - Turning ON Bulb");
37        digitalWrite(PIN4, LOW);  // ON
38        pirActivated = true;
39        delay(5000);  // Keep it ON for 5 seconds
40        digitalWrite(PIN4, HIGH); // OFF
41    }
42
43    if (espSerial.available()) {
44        String command = espSerial.readStringUntil('\n');
45        command.trim();
46        Serial.println("Received: " + command);
47
48        if (command == "ON1") {
49            digitalWrite(PIN1, LOW); // ON
50            Serial.println("Fan ON");
51        } else if (command == "OFF1") {
52            digitalWrite(PIN1, HIGH); // OFF
53            Serial.println("Fan OFF");
54        } else if (command == "ON2") {
55            digitalWrite(PIN2, LOW); // ON
56            Serial.println("Device 2 ON");
57        } else if (command == "OFF2") {
58            digitalWrite(PIN2, HIGH); // OFF
59            Serial.println("Device 2 OFF");
60        } else if (command == "ON3") {
61            digitalWrite(PIN3, LOW); // ON
62            Serial.println("Device 3 ON");
63        } else if (command == "OFF3") {
64            digitalWrite(PIN3, HIGH); // OFF
65            Serial.println("Device 3 OFF");
66        } else if (command == "ON4") {
67            manualOverride = true;  // Manual ON overrides PIR
68            digitalWrite(PIN4, LOW);
69            Serial.println("Bulb ON (Manual Override)");
70        } else if (command == "OFF4") {
71            manualOverride = false;  // Allow PIR to control it again
72            digitalWrite(PIN4, HIGH);
73            Serial.println("Bulb OFF (Manual Control Disabled)");
74        }
75    }
76}