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ACEBOTT Wholesale With 13.56mhz IC Key Chain RFID Induction Module Wireless RC522 Proximity Reader Writer for Arduino Electronic
Product Description
Products Description
System Overview
Radio-Frequency Identification (RFID) is a technology used to wirelessly identify and track objects, which is based on the principle of wireless communication through the use of RFID tags and RFID readers.
RFID Tag
An RFID tag is a small chip that contains a unique identifier UID (usually a numeric code) along with some memory for storing additional information. These tags usually consist of an RFID chip and an antenna.
RFID Reader
An RFID reader is an electronic device that generates a radio frequency signal and sends it to a nearby RFID tag. The reader is also responsible for receiving the response signal from the tag and decoding the tag’s information.
RF Communication
When an RFID reader sends an RF signal, it activates nearby RFID tags. Passive RFID tags get energy from the reader’s signal as well as operational commands and use it to send their own response signals. Active RFID tags have their own electricity supply, so they can actively send signals.
Application Reference
Scenarios requiring object recognition such as management systems and security systems.
Technical Specifications
| Operating voltage | 3.3V~5V |
| Operating temperature | -40°C~+80°C |
| Protocol standard | ISO 14443A, ISO 14443B |
| Support card type | mifare S50, mifare S70 |
| Frequency | 13.56MHz |
| Communication mode | IIC |
| Size | 4.72cm*2.38cm |
Pin Assignment & Wiring (ESP32)
| RFID RC522 I2C Module | ESP32 |
|---|---|
| VCC | 5V |
| GND | GND |
| SCL | SCL |
| SDA | SDA |
Note: Expansion board is attached to esp32 controller board.
Frequently Asked Questions (FAQ)
1. What communication interface does this RFID module use?
The RFID RC522 module operates using the IIC (I2C) communication interface, requiring only SCL and SDA connections for data exchange.
2. What operating voltage does the module require?
The module supports a wide working voltage range of 3.3V to 5V DC, making it directly compatible with 3.3V microcontrollers like the ESP32 as well as 5V systems.
3. What RFID protocols and card types are supported?
It operates at a 13.56MHz frequency and complies with ISO 14443A and ISO 14443B protocol standards. It is compatible with Mifare S50 and Mifare S70 card types.
4. How is the module connected to an ESP32 board?
The pinout pairs VCC to 5V, GND to GND, SCL to SCL, and SDA to SDA. Note that an expansion board is attached to the ESP32 controller board for straightforward wiring.
5. What are the operating temperature limits and module dimensions?
The unit has an operational temperature range from -40°C to +80°C and compact physical dimensions of 4.72cm by 2.38cm.
6. What applications is this RFID setup suitable for?
It is primarily designed for automated object recognition scenarios, including access control, security systems, asset tracking, and management systems.
