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RFID Read Module 125khz
The RFID Read Module 125khz is a passive radio frequency identification reader designed to detect and decode 125kHz EM4100 compatible RFID cards and tags at distances up to 10cm. Professional security integrators, access control system designers, and embedded systems engineers use this module to build identification and authentication systems for personnel tracking, asset management, and facility access control. This module solves the critical challenge of implementing reliable, cost-effective proximity-based identification without requiring powered tags or complex wireless protocols.
Product Overview
The 125kHz RFID Read Module operates on the Low Frequency band, making it ideal for short-range identification applications where power consumption and tag cost are critical factors. The module uses electromagnetic induction to energize passive RFID tags, extracting their unique identification codes through modulated RF signals. The 125kHz frequency provides superior penetration through non-metallic materials compared to higher frequency alternatives, making it suitable for access cards embedded in wallets, badges, and protective enclosures. The module outputs decoded tag data via serial UART interface, enabling seamless integration with microcontrollers, Arduino boards, and embedded Linux systems.
This RFID reader module features a compact PCB design with integrated antenna coil and signal conditioning circuitry, eliminating the need for external RF tuning components. The module automatically handles modulation, demodulation, and error detection protocols, presenting clean digital output to your microcontroller. Its robust design withstands industrial environments with operating temperatures from -20°C to +60°C, making it suitable for both indoor access control systems and outdoor asset tracking applications. The low power consumption of approximately 50-80mA during active reading ensures compatibility with battery-powered portable readers and always-on installation systems.
Key Specifications
| Specification | Details |
| Product Type | 125kHz RFID Reader Module with Serial Output |
| Brand | Standard OEM Compatible |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Operating Frequency | 125kHz |
| Reading Distance | 8-12cm depending on tag type |
| Interface | Serial UART TTL (9600 baud default) |
| Power Supply | 5V DC, 50-80mA typical |
| Output Format | 10-byte ASCII hex string per tag read |
| Operating Temperature | -20°C to +60°C |
| PCB Dimensions | Approximately 35mm x 55mm |
Key Features
- 125kHz Low Frequency operation enables reading through plastic badges, wallets, and non-metallic enclosures without signal degradation
- Serial UART output with configurable baud rates (default 9600) provides direct microcontroller compatibility without additional signal conditioning
- Integrated antenna coil eliminates external tuning requirements and reduces PCB real estate, simplifying system integration
- Automatic tag detection with configurable read intervals prevents duplicate reads and reduces processor overhead
- Wide operating temperature range from -20°C to +60°C ensures reliable performance in climate-controlled offices and harsh industrial environments
- Low power consumption of 50-80mA enables battery-powered portable reader designs with extended operational duration
Applications and Use Cases
- Access Control Systems: Integrate into door lock controllers and turnstile systems for personnel authentication using proximity cards at office entrances and secure facilities
- Asset Tracking and Inventory Management: Embed in warehouse management systems to track high-value equipment, tools, and inventory containers throughout supply chain operations
- Time and Attendance Systems: Deploy in employee badge readers at facility entry points to automate work hour logging and generate attendance reports
- Library and Document Management: Implement in book checkout systems and document tracking applications for educational institutions and corporate information centers
- Pet Identification and Animal Management: Utilize in veterinary clinics and animal shelters to read microchip data from companion animals and livestock
- Parking and Vehicle Access: Integrate into automated parking gate systems where resident vehicles carry 125kHz RFID tags for seamless entry authorization
How to Use
To implement the RFID Read Module 125khz, first establish serial communication between the module and your microcontroller by connecting the TX pin to your microcontroller's RX pin, RX to TX, GND to GND, and VCC to a regulated 5V power supply. Configure your serial port to 9600 baud rate, 8 data bits, 1 stop bit, and no parity. The module will continuously scan for RFID tags within its read range and output a 10-byte ASCII hexadecimal string representing the tag's unique ID whenever a valid tag is detected.
When a tag is successfully read, the module transmits the identification data followed by a carriage return and line feed character, allowing your microcontroller to parse individual tag reads using interrupt-driven serial reception or polling methods. Implement debouncing logic in your firmware to ignore duplicate reads occurring within 100-200ms intervals, as the module may detect the same tag multiple times during a single pass. For access control applications, compare the received tag ID against a whitelist stored in your microcontroller's EEPROM or external database, triggering relay outputs or GPIO signals to activate door locks or alarm systems based on authorization status.
Frequently Asked Questions
What is the difference between 125kHz and 13.56MHz RFID modules?
125kHz operates at Low Frequency with superior range through non-metallic materials and lower cost tags, ideal for access control. 13.56MHz operates at High Frequency with faster data transfer, encryption support, and smaller tag sizes, suitable for payment systems and complex data storage. Choose 125kHz for simple proximity identification and 13.56MHz for secure data transactions.
Can this module read ISO11784/11785 animal microchips?
Yes, the 125kHz RFID Read Module is fully compatible with ISO11784/11785 standard animal microchips used in veterinary applications. The module will read and output the 10-byte unique identifier encoded in these microchips. However, ensure your microcontroller firmware implements the proper bit-shifting and checksum validation required by the ISO11784/11785 standard to extract the actual animal ID from the raw data.
How do I extend the reading distance beyond 12cm?
Reading distance depends on tag antenna size and coil inductance matching. Use larger RFID tags with bigger antenna coils to achieve 15-20cm range. Alternatively, add an external antenna coil with proper impedance matching, though this requires RF tuning expertise. For most access control applications, the standard 8-12cm range is sufficient when tags are positioned correctly at reader proximity.
What baud rates does this module support?
The standard configuration operates at 9600 baud. Some modules support firmware reconfiguration to 2400, 4800, 19200, or 38400 baud through special command sequences. Consult your module's datasheet for supported rates. For most Arduino and microcontroller applications, 9600 baud provides reliable communication without timing issues.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy RFID Read Module 125khz Online in India
Purchase the RFID Read Module 125khz online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on RFID Read Module 125khz with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
RFID Read Module 125khz
The RFID Read Module 125khz is a passive radio frequency identification reader designed to detect and decode 125kHz EM4100 compatible RFID cards and tags at distances up to 10cm. Professional security integrators, access control system designers, and embedded systems engineers use this module to build identification and authentication systems for personnel tracking, asset management, and facility access control. This module solves the critical challenge of implementing reliable, cost-effective proximity-based identification without requiring powered tags or complex wireless protocols.
Product Overview
The 125kHz RFID Read Module operates on the Low Frequency band, making it ideal for short-range identification applications where power consumption and tag cost are critical factors. The module uses electromagnetic induction to energize passive RFID tags, extracting their unique identification codes through modulated RF signals. The 125kHz frequency provides superior penetration through non-metallic materials compared to higher frequency alternatives, making it suitable for access cards embedded in wallets, badges, and protective enclosures. The module outputs decoded tag data via serial UART interface, enabling seamless integration with microcontrollers, Arduino boards, and embedded Linux systems.
This RFID reader module features a compact PCB design with integrated antenna coil and signal conditioning circuitry, eliminating the need for external RF tuning components. The module automatically handles modulation, demodulation, and error detection protocols, presenting clean digital output to your microcontroller. Its robust design withstands industrial environments with operating temperatures from -20°C to +60°C, making it suitable for both indoor access control systems and outdoor asset tracking applications. The low power consumption of approximately 50-80mA during active reading ensures compatibility with battery-powered portable readers and always-on installation systems.
Key Specifications
| Specification | Details |
| Product Type | 125kHz RFID Reader Module with Serial Output |
| Brand | Standard OEM Compatible |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Operating Frequency | 125kHz |
| Reading Distance | 8-12cm depending on tag type |
| Interface | Serial UART TTL (9600 baud default) |
| Power Supply | 5V DC, 50-80mA typical |
| Output Format | 10-byte ASCII hex string per tag read |
| Operating Temperature | -20°C to +60°C |
| PCB Dimensions | Approximately 35mm x 55mm |
Key Features
- 125kHz Low Frequency operation enables reading through plastic badges, wallets, and non-metallic enclosures without signal degradation
- Serial UART output with configurable baud rates (default 9600) provides direct microcontroller compatibility without additional signal conditioning
- Integrated antenna coil eliminates external tuning requirements and reduces PCB real estate, simplifying system integration
- Automatic tag detection with configurable read intervals prevents duplicate reads and reduces processor overhead
- Wide operating temperature range from -20°C to +60°C ensures reliable performance in climate-controlled offices and harsh industrial environments
- Low power consumption of 50-80mA enables battery-powered portable reader designs with extended operational duration
Applications and Use Cases
- Access Control Systems: Integrate into door lock controllers and turnstile systems for personnel authentication using proximity cards at office entrances and secure facilities
- Asset Tracking and Inventory Management: Embed in warehouse management systems to track high-value equipment, tools, and inventory containers throughout supply chain operations
- Time and Attendance Systems: Deploy in employee badge readers at facility entry points to automate work hour logging and generate attendance reports
- Library and Document Management: Implement in book checkout systems and document tracking applications for educational institutions and corporate information centers
- Pet Identification and Animal Management: Utilize in veterinary clinics and animal shelters to read microchip data from companion animals and livestock
- Parking and Vehicle Access: Integrate into automated parking gate systems where resident vehicles carry 125kHz RFID tags for seamless entry authorization
How to Use
To implement the RFID Read Module 125khz, first establish serial communication between the module and your microcontroller by connecting the TX pin to your microcontroller's RX pin, RX to TX, GND to GND, and VCC to a regulated 5V power supply. Configure your serial port to 9600 baud rate, 8 data bits, 1 stop bit, and no parity. The module will continuously scan for RFID tags within its read range and output a 10-byte ASCII hexadecimal string representing the tag's unique ID whenever a valid tag is detected.
When a tag is successfully read, the module transmits the identification data followed by a carriage return and line feed character, allowing your microcontroller to parse individual tag reads using interrupt-driven serial reception or polling methods. Implement debouncing logic in your firmware to ignore duplicate reads occurring within 100-200ms intervals, as the module may detect the same tag multiple times during a single pass. For access control applications, compare the received tag ID against a whitelist stored in your microcontroller's EEPROM or external database, triggering relay outputs or GPIO signals to activate door locks or alarm systems based on authorization status.
Frequently Asked Questions
What is the difference between 125kHz and 13.56MHz RFID modules?
125kHz operates at Low Frequency with superior range through non-metallic materials and lower cost tags, ideal for access control. 13.56MHz operates at High Frequency with faster data transfer, encryption support, and smaller tag sizes, suitable for payment systems and complex data storage. Choose 125kHz for simple proximity identification and 13.56MHz for secure data transactions.
Can this module read ISO11784/11785 animal microchips?
Yes, the 125kHz RFID Read Module is fully compatible with ISO11784/11785 standard animal microchips used in veterinary applications. The module will read and output the 10-byte unique identifier encoded in these microchips. However, ensure your microcontroller firmware implements the proper bit-shifting and checksum validation required by the ISO11784/11785 standard to extract the actual animal ID from the raw data.
How do I extend the reading distance beyond 12cm?
Reading distance depends on tag antenna size and coil inductance matching. Use larger RFID tags with bigger antenna coils to achieve 15-20cm range. Alternatively, add an external antenna coil with proper impedance matching, though this requires RF tuning expertise. For most access control applications, the standard 8-12cm range is sufficient when tags are positioned correctly at reader proximity.
What baud rates does this module support?
The standard configuration operates at 9600 baud. Some modules support firmware reconfiguration to 2400, 4800, 19200, or 38400 baud through special command sequences. Consult your module's datasheet for supported rates. For most Arduino and microcontroller applications, 9600 baud provides reliable communication without timing issues.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy RFID Read Module 125khz Online in India
Purchase the RFID Read Module 125khz online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on RFID Read Module 125khz with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.