WS1830S Dual-Band 125KHz & 13.56MHz RFID / NFC Reader Module
The WS1830S Dual-Frequency RFID Module is a compact, high-performance contactless card reader board designed to read both 125KHz low-frequency (ID) and 13.56MHz high-frequency (IC/NFC) tags using a single onboard antenna. Featuring an integrated copper coil and powered by the WS1830S chip alongside an onboard controller (CH552T), this module simplifies multi-protocol access control hardware by eliminating the need for separate reader modules for different card types.
Equipped with both Serial UART (TTL) and Wiegand (D0/D1) output interfaces, it seamlessly integrates with microcontrollers (ESP32, Arduino, STM32, Raspberry Pi) as well as commercial access control panels and PLCs.
Key Features & Technical Highlights
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Dual-Frequency Versatility: Reads standard 125KHz EM/TK ID cards as well as 13.56MHz Mifare / ISO14443A IC cards on a single surface coil.
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Integrated Surface Antenna: Includes a factory-tuned planar copper coil directly mounted over the board components, minimizing space requirements.
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Dual Communication Interfaces: Configurable output supporting both TTL Serial UART (TX/RX) for MCU communication and Wiegand (D0/D1) for access control panels.
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Wide Supply Voltage Range: Operates natively from 3.3V to 5V DC, making it directly compatible with 3.3V logic (ESP32, STM32) and 5V logic (Arduino, 8051) without level shifters.
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Compact Plug-and-Play Design: Features a standard 5-pin JST connector for quick installation into tight enclosures or custom control panels.
Technical Specifications
| Parameter | Specification |
| Core ICs | WS1830S (13.56MHz Front-End) + CH552T MCU |
| Operating Frequencies | 125KHz (LF) & 13.56MHz (HF) |
| Supported Card Types |
125KHz: EM4100, TK4100 (ID Cards)
13.56MHz: Mifare S50/S70, ISO/IEC 14443A (IC/NFC Cards) |
| Operating Voltage (VCC) | 3.3V – 5V DC |
| Operating Current | 25mA – 40mA |
| Read Distance | 2cm – 5cm (depending on card size and geometry) |
| Data Interfaces | UART (TTL Level) / Wiegand 26 / Wiegand 34 |
| Default Baud Rate (UART) | 9600 bps (8-N-1) |
| Antenna Type | Integrated PCB-mounted copper coil |
| Connector Type | 5-Pin JST Surface Mount Connector |
Pinout Configuration
| Pin Label | Function | Description |
| 3.3V – 5V | Power Input | +3.3V to +5V DC Power Supply |
| RX / D1 | Data Receive / Wiegand D1 | UART RX Data Line / Wiegand Data 1 Output |
| TX / D0 | Data Transmit / Wiegand D0 | UART TX Data Line / Wiegand Data 0 Output |
| GND | Ground | Common Power Ground (0V) |
| CST / S1 / S2 | Control / Status Pins | Output Selection / Trigger Control Pins |
Recommended Applications
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Multi-Format Access Control: Upgrading legacy 125KHz door lock systems to accept modern 13.56MHz IC cards or NFC smartphones without replacing existing hardware.
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Time & Attendance Terminals: Building dual-card swipe systems for office, school, or industrial worker tracking.
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Embedded IoT Security: Smart locker boxes, turnstiles, and automated vending/dispensing systems.
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Handheld POS & Readers: Compact portable terminals requiring dual ID/IC card scanning capability.
