Access Control System with RFID

This project uses two ESP32s to implement an access control system with RFID.

Functionality:

ESP32_2 waits for an RFID card to be read. When the card is detected, it triggers the buzzer for authorized or unauthorized access and sends a message to an MQTT broker. ESP32_1 subscribes to the same MQTT channel and waits to receive the access status to activate the RGB LED and provide feedback on the OLED display.

ESP32_2 also sends temperature and humidity data to another MQTT channel, allowing data visualization on ThingsBoard.

• esp_1:
  Contains the OLED display, RGB LED, WiFi, and MQTT configurations.
• esp_2:
  Contains the RFID reader, DHT11 temperature and humidity sensor, buzzer, WiFi, and MQTT configurations.

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Technologies Used

• C Language: Firmware development for ESP32.
• ESP-IDF: Espressif's development framework for ESP32.
• MQTT: Communication protocol between ESP32s and ThingsBoard.
• ThingsBoard: IoT platform for monitoring and remote control.

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Components Used

• RFID Module MFRC522: RFID reading and writing module for access control.
• ESP32: Microcontrollers for control and communication.
• Temperature and Humidity Sensor (DHT11): Measures environmental conditions for possible system adjustments.
• LEDs: Simulate controlled lighting.
• OLED Display: Shows the current operating mode.
• Internal Button: For switching operating modes.
• Buzzer: Indicates changes in operating mode.

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Communication and Integration

• The communication between ESP32s and ThingsBoard is done using the MQTT protocol, allowing telemetry data transmission and receiving commands to adjust operating modes.

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ESP32 Environment Setup

This guide provides instructions to set up the ESP32 development environment, clone the ESP-IDF repository, install dependencies, and build the project.

1. Create the ESP Directory

mkdir ~/esp

2. Clone the ESP-IDF Repository

git clone --recursive https://github.com/espressif/esp-idf.git ~/esp/esp-idf

3. Install Dependencies

cd ~/esp/esp-idf
./install.sh

4. Activate the ESP Environment

. ~/esp/esp-idf/export.sh

5. Configure Environment Variables

Navigate to each ESP directory and run the menuconfig command:

idf.py menuconfig

How to Run

1. Export the ESP-IDF environment:

Locate the ESP-IDF installation directory:

source ~/esp/esp-idf/export.sh

2. Compile and run for each ESP32:

Navigate to the ESP directory (esp_1 or esp_2):

cd esp_1  # or cd esp_2

Compile the project:

idf.py build

Upload the firmware (replace /dev/ttyUSB0 with the correct port):

idf.py -p /dev/ttyUSB0 flash

Monitor the output:

idf.py -p /dev/ttyUSB0 monitor

3. Check the USB port:

Use the following command to identify the correct port where the ESP32 is connected:

ls /dev/tty*

External Libraries Used (Submodules)

The project uses external libraries for RFID and the DHT11 sensor, included as Git submodules:

[submodule "esp_2/components/rc522"]
    path = esp_2/components/rc522
    url = https://github.com/abobija/esp-idf-rc522.git

[submodule "esp_2/components/DHT11"]
    path = esp_2/components/DHT11
    url = https://github.com/Anacron-sec/esp32-DHT11

[submodule "esp_1/components/components/u8g2-hal-esp-idf"]
    path = esp_1/components/components/u8g2-hal-esp-idf
    url = https://github.com/mkfrey/u8g2-hal-esp-idf.git
    
[submodule "esp_1/components/components/u8g2"]
    path = esp_1/components/components/u8g2
    url = https://github.com/olikraus/u8g2.git