A02YYUW Waterproof Ultrasonic Sensor for Arduino / ESP32 / Home Assistant (IP67, 3~450cm,UART)
Introduction
The A02YYUW Waterproof Ultrasonic Sensor is a reliable, high-performance ranging module designed specifically for makers and smart home enthusiasts. This IP67-rated sensor delivers stable distance measurements from 3cm to 450cm, even in harsh, humid environments. Featuring a tiny 3cm blind spot and a simple UART interface, it's the perfect non-contact level sensor for DIY projects like water tank monitors, automatic plant watering systems, or smart trash cans. The ranging module seamlessly integrates with Arduino, ESP32, Raspberry Pi, and enjoys native support for ESPHome, making Home Assistant automations easier than ever.
True IP67 Waterproofing for Long-Term Stability
Humidity can ruin a project. Unlike sensors with exposed circuit boards (like the HC-SR04) or inconvenient split designs (JSN-SR04T), the A02YYUW ultrasonic distance sensor features a fully sealed, integrated body. Its IP67 waterproof rating means it can withstand dust, splashes, and even temporary submersion. This robust design ensures stable, reliable data output over the long term, making it the ideal choice for outdoor applications or continuous liquid level monitoring.
Measure What Matters: The 3cm Ultra-Small Blind Spot Advantage
When monitoring a tank, every centimeter counts. The JSN-SR04T, has a massive 20cm blind spot, making it impossible to detect when a tank is nearly full.
The A02YYUW sonar sensor solves this with an industry-leading 3cm blind spot. This allows for accurate distance readings right up to the top, providing precise control over water levels and preventing overflows in automated systems.
Beam Directionalities Diagram
Smart Home Simplified: ESPHome & Home Assistant Ready
Bring smart home projects to life with unparalleled ease. The A02YYUW home assistant distance sensor is fully compatible with ESPHome, allowing for seamless, code-free integration into a Home Assistant dashboard. Build powerful automations without the struggle of complex programming. Whether it's a sump pump monitor or a pet water bowl auto-filler, this ultrasonic distance sensor is the perfect non-contact water level sensor for any smart home ecosystem.
Maker-Friendly & Versatile for All Projects
This ultrasonic distance detection sensor is designed with the DIY community in mind. It operates on a flexible 3.3V-5V power supply and communicates via a standard UART serial port, making it incredibly easy to connect to any microcontroller. It's fully compatible with popular platforms like Arduino, ESP32, and Raspberry Pi. A connection cable is included, allowing projects to be up and running in minutes, not hours.
A02YYUW Waterproof Ultrasonic Sensor compatible with Arduino / ESP32 / Raspberry Pi
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Review
May 31, 2025
Easy install to Raspberry Pi with pyhton.
May 31, 2025
I can use this by Python with Raspberri Pi 4 or CM5.
Feb 04, 2025
This product is a good quality product. You can see from the product itself that it uses good quality materials. The plastic looks good quality.