RFID Sensor Module 13.56MHz WS1850S – Arduino Compatible

13.56MHz RFID Sensor Module with WS1850S Chip

Upgrade your electronics projects with this compact, high-frequency RFID Sensor Module featuring the built-in WS1850S chip operating at 13.56 MHz. Designed for makers, developers, and engineers, this module supports contactless card reading, card writing, recognition, encoding, and authorization — making it ideal for access control, check-in systems, inventory management, vehicle entry/exit tracking, and smart home integrations.

Using magnetic field induction technology, the module enables non-contact, two-way data exchange with compatible RF cards. It reads and verifies card information quickly and accurately — all within a range of less than 20 mm. Whether you're building with Arduino or using UIFlow (Blockly or Python), this module integrates seamlessly into your workflow. Made in Mainland China.

Key Specifications

• Chip: WS1850S
• Working Frequency: 13.56 MHz
• I²C Data Rate: Fast mode up to 400 Kbit/s; High-speed mode up to 3,400 Kbit/s
• Transceiver Buffer: 64 bytes
• Supported Protocols: ISO14443A, MIFARE, NTAG
• Operating Temperature: -20°C to 85°C
• Data Retention: Greater than 10 years
• Read/Write Distance: Less than 20 mm
• Development Platforms: Arduino, UIFlow (Blockly, Python)
• LEGO-Compatible Holes: 2x
• Material: Plastic

Common Applications

• Smart Home Access Control Systems
• Vehicle Management & Entry/Exit Registration
• Intelligent Transportation Systems
• Smart Bookshelf & Inventory Tracking
• Warehouse Goods Storage
• Employee or Visitor Check-In Systems

What's in the Box

• 1 × RFID Sensor Module (WS1850S, 13.56MHz)

Note: Product appearance and printed markings may vary slightly by production batch; this does not affect functionality. Minor color differences may occur due to display settings. Measurement tolerance: ±1–3 cm.

For general guidance on RFID and radio frequency technology standards, visit the NIST RFID Technology Resource.

Frequently Asked Questions

Q: What RFID protocols does the WS1850S sensor module support?

A: This 13.56MHz RFID sensor module supports ISO14443A, MIFARE, and NTAG protocols, making it compatible with the most widely used contactless smart cards and tags for access control and identification systems.

Q: Is this RFID module compatible with Arduino?

A: Yes, the WS1850S RFID sensor module is compatible with Arduino development boards as well as UIFlow (Blockly and Python), making it versatile for both beginners and advanced makers working on electronics projects.

Q: What is the read/write distance of this RFID module?

A: The module's effective read and write distance is less than 20 mm, enabling reliable close-range contactless data exchange — perfect for secure access control and identification applications.

Q: Can this module both read and write to RFID cards?

A: Yes, this module supports multiple functions including card reading, card writing, recognition, recording, encoding, and authorization of RF cards, providing comprehensive RFID functionality for your projects.