Description M5Stack Ultrasonic I2C Unit is a compact ultrasonic distance sensor built around the RCWL-9620 ranging chip and a 16mm probe. It communicates over I2C at address 0x57 and provides a working range of 2cm to 450cm with temperature compensation for more stable readings. That makes this unit a practical fit for robot obstacle avoidance, liquid level measurement, and embedded proximity sensing that needs an easy I2C distance sensor. Features Ultrasonic I2C Unit uses the RCWL-9620 as a precise ultrasonic distance sensor. The I2C @0x57 interface makes it easy to add an I2C distance sensor without consuming extra GPIO lines. Built-in temperature compensation helps reduce drift in longer measurement sessions. This module is ideal for robot obstacle avoidance, distance-triggered actions, and liquid level measurement. The protective cover and 16mm probe help maintain stable operation in compact systems. Specifications Product Ultrasonic I2C Unit Ranging SoC RCWL-9620 Communication I2C @0x57 Range 2cm ~ 450cm Probe Specification 16mm Transmit / Receive Frequency 40KHz Measurement Accuracy ±2% Measurement Cycle 50ms Working Current 3mA Product Size 56.0 x 24.0 x 15.2mm Applications M5Stack Ultrasonic I2C Unit works well for non-contact ranging. Typical use cases include robot obstacle avoidance, liquid level measurement, posture detection, smart containers, and interactive devices that benefit from an easy I2C distance sensor over a shared bus. Product List 1 x Ultrasonic distance sensor unit 1 x HY2.0-4P Grove cable (20cm) Other Content The official weight and dimensional references are useful when checking enclosure fit, mounting, or board-level integration. Resources M5Stack Ultrasonic I2C Unit Official Docs RCWL-9620 Datasheet Ultrasonic I2C Structure Files Ultrasonic Unit UIFlow Docs UiFlow2 FAQ What is this module best used for?It is a compact ultrasonic distance sensor for robot obstacle avoidance, liquid level measurement, and proximity-aware projects. Why choose this version?It is useful when you want an I2C distance sensor that saves IO resources and shares the bus with other devices.
