• M5Stack Ultrasonic Distance Sensor I/O Unit front product view
  • M5Stack Ultrasonic Distance Sensor I/O Unit angled product view
  • M5Stack RCWL-9620 ultrasonic transducer hardware detail
  • M5Stack Ultrasonic Distance Sensor I/O Unit side view
  • M5Stack Ultrasonic Distance Sensor I/O Unit Grove connector detail
  • M5Stack Ultrasonic Distance Sensor I/O Unit size reference
  • M5Stack Ultrasonic Distance Sensor I/O Unit connection example
  • M5Stack Ultrasonic Distance Sensor I/O Unit package overview

M5Stack Ultrasonic Distance Sensor I/O Unit (RCWL-9620)

M5Stack Ultrasonic Distance Sensor I/O Unit (RCWL-9620)

LB-M5-U098-B2

20 in stock
$8.50 USD
$8.50 USD $5.95 USD

Key Features

  • 2–450 cm contactless ranging with ±2% specified accuracy
  • RCWL-9620 controller with a 16 mm, 40 kHz ultrasonic transducer
  • Direct GPIO trigger/echo timing for transparent host-side measurement
  • Internal temperature compensation for more consistent distance readings
  • Low operating current of approximately 3 mA

The M5Stack Ultrasonic Distance Sensor I/O Unit adds contactless distance measurement to robots, level monitors, parking indicators, and interactive installations. Its RCWL-9620 controller, 16 mm ultrasonic transducer, GPIO trigger/echo interface, and internal temperature compensation support measurements from 2 to 450 cm while keeping host integration straightforward. It suits developers who need a compact ranging module and prefer direct pulse-width measurement instead of an I2C abstraction.

What You Can Build

  • Obstacle detection and stopping distance for small mobile robots.
  • Fill-level monitoring for bins, tanks, and storage containers.
  • Parking, approach, and presence indicators for indoor equipment.
  • Distance-triggered lighting, displays, and interactive exhibits.
  • Position and clearance experiments for prototypes and teaching projects.

Key Capabilities

  • Measures targets from 2 to 450 cm with ±2% specified accuracy.
  • Uses a familiar trigger-and-echo GPIO workflow for direct timing control.
  • Operates at 40 kHz with a 50 ms measurement cycle.
  • Includes internal temperature compensation to reduce thermal drift.
  • Draws approximately 3 mA during operation.

Setup and Integration

  1. Connect the Grove cable to host pins that support one output for TRIG and one input for ECHO.
  2. Send a short trigger pulse, measure the returned echo-pulse width, and convert the elapsed time into distance.
  3. Start with one sensor and a flat, hard target positioned perpendicular to the transducer.
  4. Add timeout handling, median filtering, and minimum-change rules before using the value in motion or control logic.

Example Workflow

  1. Trigger a measurement no faster than the 50 ms cycle.
  2. Reject missing echoes and readings outside the 2–450 cm operating range.
  3. Filter several valid samples to reduce reflections and short spikes.
  4. Apply the result to a distance alarm, robot speed limit, or level calculation.

Deployment Notes

  • Soft, narrow, angled, curved, moving, or sound-absorbing targets can reduce usable range.
  • Multiple ultrasonic sensors can interfere with each other; trigger them sequentially and allow echoes to decay.
  • Keep the transducer face unobstructed and provide clearance from enclosure edges.
  • The module has no stated waterproof rating and should be protected from condensation, rain, and splashes.
  • At long distance, use a practical timeout instead of blocking the host while waiting for an echo.

Development Resources

M5Stack Ultrasonic Distance Sensor I/O Unit (RCWL-9620)

$8.50 USD

How can I confirm product compatibility?

Check the product specifications, operating voltage, communication interface, dimensions, connector type, and software requirements before ordering. Compatibility may also depend on your controller, operating system, development framework, library version, and project wiring.

If you are unsure, contact us before purchasing and include your controller model, intended application, power source, and any other hardware you plan to use. We will help you identify the most suitable option, but we cannot guarantee that every product will work with every platform or project.

Does the product come with a warranty?

Warranty coverage may vary by product and manufacturer. If your order arrives damaged, incomplete, or appears to have a manufacturing defect, contact us as soon as possible with your order number, product model, and clear photos or videos of the issue.

Our team will review the information and provide the appropriate next step according to the applicable product and after-sales policy. Damage caused by incorrect wiring, unsuitable voltage, unauthorized modification, soldering, misuse, or operation outside the documented specifications may not be covered.

How long does shipping take?

LogicBoundless provides worldwide shipping, with primary service coverage across the United States, Europe, and Asia. Orders are generally fulfilled from Shenzhen, China, and tracking information is provided after dispatch.

Processing and delivery times depend on product availability, destination, customs clearance, and the selected shipping service. Please review the Shipping Information page for the latest estimated delivery times and shipping conditions.

What is your return policy?

Eligible products may be returned within 30 days of delivery. Returned items must be unused, unsoldered, unmodified, and kept in their original condition with all packaging, cables, accessories, manuals, and included components.

Please contact support@logicboundless.com before sending anything back. Returns made without prior approval may not be accepted. Original shipping charges are generally non-refundable unless the return is caused by a verified product defect or fulfillment error.

Can you help if I have a technical problem?

Yes. LogicBoundless provides practical technical guidance for product setup, wiring, power, communication, code, and configuration issues.

To help us understand the problem efficiently, please provide your controller model, wiring photos, power source, code, library or firmware versions, expected behavior, and complete error messages. We cannot promise that every component will work in every system, but we will help you identify the likely cause and the next practical troubleshooting step.

Can I change or cancel my order?

Contact us as soon as possible if you need to change or cancel an order. We will try to assist before the order enters processing or is handed to the shipping carrier.

Once an order has been packed or dispatched, it may no longer be possible to change the products, delivery address, or shipping method. In that case, the standard return process may apply after delivery.

Don’t Just Take Our Word for It

  • A Clearer Way to Get Started

    LogicBoundless made it much easier to understand which components worked together. The product information was clear, and I could move from an idea to a working prototype without wasting time on incompatible hardware.

    Verified Maker
    First-Time IoT Builder

  • Practical Support Beyond the Product

    What stood out was the practical guidance. The specifications, compatibility notes, and troubleshooting resources helped us choose the right hardware and solve development issues more efficiently.

    Verified Customer
    Embedded Systems Engineer

  • Making Hardware Easier to Learn

    The clear explanations and project-focused resources made complex hardware easier to understand. Instead of simply following instructions, learners could see how each component contributed to the complete system.

    Education Partner
    STEM Instructor
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