Dual RFID Access Control System with Wemos D1 Mini and Buzzer Notification
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Circuit Documentation
Summary
This circuit integrates two RFID-RC522 modules with two Wemos D1 Mini microcontroller boards. Additionally, a buzzer is connected to one of the Wemos D1 Mini boards. The RFID-RC522 modules are used for RFID communication, likely for scanning RFID tags or cards. The Wemos D1 Mini boards are Wi-Fi capable microcontrollers based on the ESP8266 chip, which can be programmed to control the RFID modules and the buzzer. The buzzer is typically used for audible feedback, such as signaling a successful read of an RFID tag.
Component List
RFID-RC522
- Description: An RFID reader/writer module for 13.56 MHz cards.
- Pins: SDA, SCK, MOSI, MISO, IRQ, GND, RST, 3.3V
Wemos D1 Mini
- Description: A compact Wi-Fi capable microcontroller board based on the ESP8266 chip.
- Pins: RST, A0, D0, D5, D6, D7, D8, 3V3, 5V, G, D4, D3, D2, D1, RX, TX
Buzzer
- Description: An electromechanical component that produces sound.
- Pins: PIN, GND
Comment
- Description: A placeholder for comments within the circuit design. This component does not have physical pins or connections.
Wiring Details
RFID-RC522
- SDA connected to Wemos D1 Mini D2
- SCK connected to Wemos D1 Mini D5
- MOSI connected to Wemos D1 Mini D7
- MISO connected to Wemos D1 Mini D6
- GND connected to Wemos D1 Mini G (Ground)
- RST connected to Wemos D1 Mini D1
- 3.3V connected to Wemos D1 Mini 3V3
Wemos D1 Mini
- D2 connected to RFID-RC522 SDA
- D5 connected to RFID-RC522 SCK
- D7 connected to RFID-RC522 MOSI
- D6 connected to RFID-RC522 MISO
- G (Ground) connected to RFID-RC522 GND and Buzzer GND
- D1 connected to RFID-RC522 RST
- 3V3 connected to RFID-RC522 3.3V
- D3 connected to Buzzer PIN
Buzzer
- PIN connected to Wemos D1 Mini D3
- GND connected to Wemos D1 Mini G (Ground)
Documented Code
There is no code provided for the microcontrollers in this circuit. The Wemos D1 Mini boards would typically be programmed using the Arduino IDE or a similar development environment. The code would handle the initialization and communication with the RFID-RC522 modules, as well as controlling the buzzer based on the RFID scan results. Without the code, the specific functionality of the circuit cannot be documented.