URM04 Ultrasonic Distance Sensor (4~500cm, RS485)

URM04 Ultrasonic Sensor (RS485) is an industrial-style ultrasonic ranging module derived from the widely used URM37 ultrasonic sensor architecture. Designed for reliable multi-node distance measurement, this ultrasonic ranging unit adopts an RS485 communication interface that supports long cable runs and stable networking in electrically noisy environments. Such architecture allows multiple ultrasonic sensing boards to operate simultaneously within a single bus, enabling scalable obstacle detection and spatial awareness systems for robotics, automation equipment, and embedded monitoring installations.

RS485 Multi‑Sensor Networking for Scalable Systems

This ultrasonic distance measurement module communicates through an RS485 interface, enabling robust long‑distance data transmission and multi-device networking. Up to 32 ultrasonic ranging nodes may operate together on a single RS485 bus, making this sensing board suitable for distributed detection tasks across larger robotic or automation platforms. Network addressing and configurable baud rates allow flexible integration into complex embedded control systems. Connection with microcontroller platforms typically requires an RS485 interface adapter such as the Arduino RS485 Shield.

Long‑Range Ultrasonic Distance Detection

This ultrasonic ranging sensor measures distances from 4 cm to 500 cm using a 40 kHz acoustic signal. Such detection capability allows reliable identification of nearby obstacles and environmental boundaries within robotic navigation systems. With centimeter‑level resolution and a well‑defined beam pattern, the sensor module supports accurate ranging in real‑time control applications. Robotics platforms, autonomous vehicles, and motion‑aware devices benefit from consistent echo‑based measurement comparable to the biological sonar principles used by bats for spatial orientation.

Integrated Temperature Measurement and Configurable Parameters

Beyond distance detection, this RS485 ultrasonic sensing board integrates a temperature sensor providing 12‑bit readings accessible through the serial communication interface. Environmental temperature data enables compensation algorithms that improve measurement stability in changing conditions. Adjustable device addresses and baud rate settings further support network deployment with multiple sensors operating on the same communication line. Such flexibility makes the module suitable for embedded sensing networks, robotics control systems, and industrial monitoring applications.

URM04 Beam Angle

Reliable obstacle detection and scalable communication make this ultrasonic sensing module suitable for robotic navigation, automated equipment monitoring, and distributed environmental sensing networks. Engineers and developers can deploy multiple RS485 ultrasonic sensors to create coordinated distance‑measurement systems that support collision avoidance, spatial mapping, and intelligent motion control across embedded robotics and automation platforms.