RFID 125KHz T5577 EM4305 Reader Writer Module UART Antenna
RFID 125KHz T5577 EM4305 Reader Writer Module UART Antenna
RFID 125KHz T5577 / EM4305 Read & Write Module with UART Interface
The T5577-RW RFID Reader/Writer Module is a compact, easy-to-integrate solution for reading and writing data to T5577, EM4305, T5557, T5567, and ATA5577-compatible 125KHz RFID cards. Designed for makers, engineers, and embedded system developers, this module communicates via a standard UART/TTL-232 serial interface, making it straightforward to connect to any MCU, Arduino, Raspberry Pi, or similar platform.
⚠️ Important Note: This module is designed exclusively for reading and writing T5577 / EM4305 chip cards. It cannot be used to copy, read, or write standard ID cards.
Key Features
- Wide Voltage Range: Operates on DC 2.7V–5V, compatible with 3.3V and 5V systems
- Low Power Consumption: Working current of only 30mA
- 125KHz Working Frequency: Industry-standard LF RFID frequency
- Read & Write Capable: Read distance up to 7cm; write distance up to 6cm
- Manchester Encoding RF/32: Reliable, widely-supported data format
- UART TTL-232 Output: 9600 bps, No parity, 8 data bits, 1 stop bit (configurable on request)
- Compact Module Size: 26 × 26 × 11mm — easy to embed in enclosures or custom PCBs
- Included Antenna: 74 × 54 × 1.5mm flat antenna for optimal range
- Wide Temperature Range: -20°C to 85°C operating temperature
- Wide Humidity Range: 0%–95% RH operating humidity
Technical Specifications
| Parameter | Value |
|---|---|
| Model | T5577-RW |
| Supply Voltage | DC 2.7V – 5V |
| Working Current | 30mA |
| Frequency | 125KHz |
| Compatible Cards | ATA5577 / T5557 / T5567 / EM4305 and compatible |
| Encoding Format | Manchester RF/32 |
| Read Distance | < 7cm |
| Write Distance | < 6cm |
| Serial Interface | TTL-232 UART, 9600 bps, 8N1 |
| Module Size | 26 × 26 × 11mm |
| Antenna Size | 74 × 54 × 1.5mm |
| Operating Temperature | -20°C to 85°C |
| Operating Humidity | 0% – 95% RH |
Pin Definitions
- GND – Ground
- VCC – Supply Voltage (2.7V–5V)
- RXD – Receive Data (from MCU)
- TXD – Send Data (to MCU)
- NC – No Connection (reserved)
- NC – No Connection (reserved)
- L1 – Antenna Connection
- L2 – Antenna Connection
What's in the Box
- 1 × T5577-RW RFID Reader/Writer Module
- 1 × External Antenna (74 × 54mm)
Made in Mainland China.
For more information on RFID technology standards and best practices in embedded systems, visit the NIST Cybersecurity Resources.
Frequently Asked Questions
Q: What RFID card types are compatible with the T5577-RW module?
A: This module is compatible with ATA5577, T5577, T5557, T5567, and EM4305 chip cards operating at 125KHz. It uses Manchester encoding RF/32 format. Standard ID cards are not supported — the module cannot read, write, or emulate them.
Q: How do I connect the T5577 RFID module to my microcontroller or Arduino?
A: Connect VCC to your 3.3V or 5V power rail, GND to ground, RXD to your MCU's TX pin, and TXD to your MCU's RX pin. Configure your serial interface to 9600 bps, 8 data bits, no parity, and 1 stop bit (9600 8N1). Attach the included antenna to the L1 and L2 pins for full read/write range.
Q: What is the maximum read and write range of this module?
A: Under typical operating conditions, this module can read T5577/EM4305 cards at distances of up to 7cm and write data at distances of up to 6cm. Actual range may vary depending on card orientation, antenna placement, and environmental factors.
Q: Can I use this module with a Raspberry Pi or other single-board computer?
A: Yes. Since the module uses a standard TTL-232 UART interface at 9600 bps, it can be connected to any single-board computer with a UART/serial port, including Raspberry Pi (via GPIO serial pins) or similar platforms. Ensure voltage compatibility — the module supports 2.7V to 5V.