Fermion: URM13 High Sensitivity Ultrasonic Distance Sensor Breakout (15~900cm, I2C / UART / PULSE)

DFRobot URM13 Ultrasonic Sensor is a compact single‑probe ultrasonic ranging module designed for accurate distance measurement across robotics, automation, and embedded control systems. This ultrasonic distance measurement board supports multiple communication methods including TRIG pulse triggering (HC‑SR04 compatible), UART, and I2C, enabling flexible integration with development platforms such as Arduino and Raspberry Pi. A precision sensing circuit combined with intelligent detection algorithms allows reliable long‑range measurements while maintaining a miniature footprint. Such characteristics make this compact ultrasonic sensing unit suitable for both experimental prototyping and professional embedded sensing applications.

Multiple Communication Protocols for Flexible Integration

This ultrasonic ranging module supports TRIG pulse-triggered measurement compatible with HC‑SR04 timing interfaces, alongside UART and I2C communication modes. Such protocol versatility enables easy adaptation to diverse embedded architectures including microcontroller boards and Linux-based controllers. UART communication employs the Modbus‑RTU protocol, allowing structured data exchange commonly used in industrial environments. Combined protocol options simplify integration within robotics platforms, smart devices, and measurement systems where different interface standards may be required.

Compact Design with High Sensitivity

A refined circuit architecture and optimized ultrasonic detection design allow this compact sensing board to maintain strong measurement performance while occupying minimal PCB space. The single‑probe ultrasonic transducer design reduces mechanical complexity while maintaining high acoustic sensitivity. As a result, this small form‑factor distance detection module delivers reliable ranging performance across a wide measurement span while remaining lightweight and easy to embed inside space‑constrained robotics platforms or instrumentation enclosures.

Automatic Noise Detection and Dynamic Calibration

Integrated intelligent sensing algorithms allow the ultrasonic distance sensor to detect environmental interference and electrical noise conditions during operation. The system dynamically adjusts internal parameters and performs real‑time calibration to maintain measurement stability. Such adaptive sensing capability improves performance in complex environments including industrial equipment, mobile robots, and automated monitoring systems where acoustic reflections or electrical noise might otherwise reduce accuracy.

RS485 Expansion with Modbus‑RTU Support

UART communication utilizes the standard Modbus‑RTU protocol and includes transmit/receive control signals that enable convenient expansion to an RS485 interface through an external RS485 transceiver. This capability allows the ultrasonic sensing board to operate within longer‑distance industrial communication networks or multi‑sensor systems. Such expandability makes the module suitable for professional monitoring applications, distributed sensing networks, and automation equipment requiring robust serial communication.

Figure: Board Overview

Figure: URM13 High Sensitivity Ultrasonic Distance Sensor Beam Angle

This ultrasonic sensing solution supports a wide range of distance‑measurement applications including robotics obstacle detection, intelligent equipment monitoring, liquid level estimation, and automated measurement systems. Flexible communication options, adaptive signal processing, and compact hardware design make this ultrasonic ranging board suitable for embedded development, rapid prototyping, and STEM Education experimentation where reliable distance sensing is required.