{"product_id":"m5stack-ultrasonic-distance-sensor-io","title":"M5Stack Ultrasonic Distance Sensor I\/O Unit (RCWL-9620)","description":"\u003cdiv class=\"product-video\"\u003e\u003ciframe width=\"100%\" height=\"500\" src=\"https:\/\/www.youtube.com\/embed\/ltJHNhReWic?autoplay=0\u0026amp;mute=1\" title=\"M5Stack Ultrasonic Distance Sensor I\/O Unit demonstration\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch2\u003eWhat You Can Build\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eObstacle detection and stopping distance for small mobile robots.\u003c\/li\u003e\n\u003cli\u003eFill-level monitoring for bins, tanks, and storage containers.\u003c\/li\u003e\n\u003cli\u003eParking, approach, and presence indicators for indoor equipment.\u003c\/li\u003e\n\u003cli\u003eDistance-triggered lighting, displays, and interactive exhibits.\u003c\/li\u003e\n\u003cli\u003ePosition and clearance experiments for prototypes and teaching projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Capabilities\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures targets from 2 to 450 cm with ±2% specified accuracy.\u003c\/li\u003e\n\u003cli\u003eUses a familiar trigger-and-echo GPIO workflow for direct timing control.\u003c\/li\u003e\n\u003cli\u003eOperates at 40 kHz with a 50 ms measurement cycle.\u003c\/li\u003e\n\u003cli\u003eIncludes internal temperature compensation to reduce thermal drift.\u003c\/li\u003e\n\u003cli\u003eDraws approximately 3 mA during operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSetup and Integration\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eConnect the Grove cable to host pins that support one output for TRIG and one input for ECHO.\u003c\/li\u003e\n\u003cli\u003eSend a short trigger pulse, measure the returned echo-pulse width, and convert the elapsed time into distance.\u003c\/li\u003e\n\u003cli\u003eStart with one sensor and a flat, hard target positioned perpendicular to the transducer.\u003c\/li\u003e\n\u003cli\u003eAdd timeout handling, median filtering, and minimum-change rules before using the value in motion or control logic.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eExample Workflow\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTrigger a measurement no faster than the 50 ms cycle.\u003c\/li\u003e\n\u003cli\u003eReject missing echoes and readings outside the 2–450 cm operating range.\u003c\/li\u003e\n\u003cli\u003eFilter several valid samples to reduce reflections and short spikes.\u003c\/li\u003e\n\u003cli\u003eApply the result to a distance alarm, robot speed limit, or level calculation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDeployment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSoft, narrow, angled, curved, moving, or sound-absorbing targets can reduce usable range.\u003c\/li\u003e\n\u003cli\u003eMultiple ultrasonic sensors can interfere with each other; trigger them sequentially and allow echoes to decay.\u003c\/li\u003e\n\u003cli\u003eKeep the transducer face unobstructed and provide clearance from enclosure edges.\u003c\/li\u003e\n\u003cli\u003eThe module has no stated waterproof rating and should be protected from condensation, rain, and splashes.\u003c\/li\u003e\n\u003cli\u003eAt long distance, use a practical timeout instead of blocking the host while waiting for an echo.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDevelopment Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/docs.m5stack.com\/en\/products\/sku\/U098-B2\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"\u003eM5Stack U098-B2 Documentation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/docs.arduino.cc\/software\/ide\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"\u003eArduino IDE\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LogicBoundless","offers":[{"title":"Default Title","offer_id":49240429625559,"sku":"LB-M5-U098-B2","price":8.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/8952\/2135\/files\/1_95d86c15-fc47-45f9-a9e8-166bda46484f.jpg?v=1783243310","url":"https:\/\/logicboundless.com\/products\/m5stack-ultrasonic-distance-sensor-io","provider":"LogicBoundless","version":"1.0","type":"link"}