RFID Cloud Attendance System (ESP32 Wi-Fi Version)

Description

⚙️ Project Concept & Working Principle:

The RFID Cloud Attendance System is a complete IoT solution designed using ESP32 (30 Pin Type-C), allowing you to record attendance and verify users seamlessly.

When a user scans their RFID card, the system checks if the card is registered or not.

• ✅ If Valid: The Green LED turns ON, the buzzer beeps once, and the LCD shows the user’s name, ID, and Wi-Fi signal strength. The data is instantly sent to Google Sheet & also as a message to a Telegram account.

• ❌ If Invalid: Red LED turns on, buzzer sounds an alert, and a notification is sent to Telegram stating “User not verified.”

💬 Note: The system can also work with WhatsApp API, but it’s not included since WhatsApp’s API is not free. For this project, we use Telegram as the message-sending platform.

This project combines RFID authentication, Wi-Fi connectivity, and IoT-based cloud logging into one compact, ready-to-build kit — perfect for students, institutions, or enthusiasts.

🧠 Key Features:

✅ ESP32 Wi-Fi-based attendance logging system
✅ RFID authentication with LED and buzzer indicators
✅ Real-time user details sent to Google Sheet
✅ Instant Telegram notification for valid/invalid users
✅ LCD display with name, UID, and Wi-Fi signal strength
✅ Supports both battery-powered and adapter-powered versions
✅ Fully DIY-ready and also available as a fully assembled coded project

🎓 Learning Outcomes (For Students):

• Understand IoT communication between ESP32 and Google Sheet via HTTP requests.

• Learn how RFID systems work with microcontrollers.

• Get experience with LCD (I2C) interfacing and Wi-Fi-based cloud automation.

• Learn how to send messages from ESP32 to Telegram Bot API.

• Know how to handle real-time validation and feedback using LEDs and buzzers.

🎥 Project Making Video (From Electri Trend YouTube Channel):

Want to see how this project is made step-by-step?
Watch the full tutorial video below 👇

▶️ Watch on YouTube (Electri Trend)

This video explains the complete connection setup, how to upload the code, and how to connect your project with Google Sheet & Telegram.
Even if you buy only the Project Kit, you’ll be able to follow this video and assemble your project easily.

💡 Note: The project shown in the video is for demonstration — our Dream RC version includes upgraded components and verified connections for reliable performance.

🚀 Why Choose This Project? (Value Proposition)

• 🔰 Ready-to-use Project Kit (just assemble and power).

• ☁️ Cloud-based – view attendance anywhere.

• 📱 Telegram alerts for real-time updates.

• 🔋 Two power options (Battery / Adapter).

• 🧠 Educational & Practical – ideal for school, college, & IoT beginners.

• 💻 Expandable – future updates can include WhatsApp or Google Sheets integration.

⚙️ Variants Available:

1️⃣ RFID Cloud Attendance System Kit (Battery Power)
2️⃣ RFID Cloud Attendance System Kit (Adapter Power)
3️⃣ RFID Cloud Attendance System Full Build Coded (Battery Power)
4️⃣ RFID Cloud Attendance System Full Build Coded (Adapter Power)

📦 Components Used:

🔋 Power Options:

🔹 Battery Version Includes:

• 2 × 18650 Li-ion Battery

• 2S Battery Case Holder

• LM2596 DC-DC Step Down Module (with display)

• 2 × Male-to-Male Jumper Wires

⚠️ Note: ESP32 operates safely between 3.3V to 5V (recommended). Do not exceed voltage limits to avoid damage.

🔹 Adapter Version Includes:

• 3–24V 5A Power Adapter (for reliable supply)

• DC Jack Female Barrel Connector with Cable

🧭 Working Principle (Overview):

1️⃣ User taps RFID card → ESP32 reads UID.
2️⃣ If valid:

• Green LED + single buzzer beep

• LCD shows name, UID, Wi-Fi strength

• Sends data (UID, name, timestamp) to Google Sheet

• Sends Telegram message confirmation.

3️⃣ If invalid:

• Red LED + buzzer alert

• “User Not Verified” message on LCD

• Telegram alert for unauthorized access

📸 [Diagram Placeholder – RFID + ESP32 + LCD + LED + Buzzer Wiring]

📸 [Photo Placeholder – Assembled prototype  layout]

🧰 Package Includes (Based on Variant):

💬 FAQ Section:

Q1: Does this project need internet to work?
✅ Yes, it requires a Wi-Fi connection for logging data to Google Sheet & sending Telegram alerts.

Q2: Can I use this project without Telegram?
✅ Yes, it will still work locally (LED, LCD, buzzer), but cloud logging and alerts won’t be sent.

Q3: Can I modify the code to use WhatsApp?
⚠️ Technically yes, but WhatsApp API is paid. That’s why we used Telegram — it’s free and stable.

Q4: Will I get the complete source code?
✅ The “Full Build Coded” version includes pre-programmed code, but the code is not shared publicly to protect development work.

Q5: Can I customize the Google Sheet?
✅ Yes, we can assist you in linking your own Google Form or Sheet during setup.

Q6. Can I modify or expand the project later?
Yes, the ESP32 allows further upgrades like fingerprint modules, OLED screens, or mobile app control.

Q7: What if I enter wrong voltage or polarity?
⚠️ ESP32 is sensitive. Always use regulated 5V input or LM2596 for voltage control.

🧩 Use Cases:

• Smart Attendance System for Schools/Colleges 🏫

• Office Entry/Exit Monitoring 🏢

• IoT Access Control Projects 🔐

• Engineering Project Demonstrations 🎓

• RFID & Cloud Communication Learning Kit 💻

Important Notes:

• ESP32 operates safely between 3.3V – 5V input range.

• Do not exceed this voltage when using batteries.

• For long use, adapter-based setup is recommended.

• Telegram API is free; WhatsApp API requires a paid business account.

• Cloud integration supports up to unlimited users via Google Sheet (depends on your form setup).

🚚 Dream RC is giving you the best deal in Bangladesh – high quality at the lowest price!

💬What is the RFID Cloud Attendance System price in BD (Bangladesh) & why buy from us?

The RFID Cloud Attendance System project kit current price in Bangladesh is 1750 BDT ( Battery Option ).
From us – Dream RC, you can get the RFID Cloud Attendance System at the most affordable price with the lowest delivery charges & fast shipment all over Bangladesh.