M5Stack ultrasonic sensor (U098-B1) – distance 2–450 cm (RCWL-9620, I2C)

The ultrasonic sensor measures distance with sound pulses, like a bat. It handles longer distances than a laser ToF and works on dark and shiny surfaces, which suits level measurement in a barrel or tank, or as a parking aid in the garage.

Good to know

ESPHome has no ready-made component for the I2C version of the RCWL-9620; it is used with a simple custom component or with Arduino/UIFlow. Soft surfaces such as fabric absorb the sound and give worse readings.

Works with

• Arduino IDE and UIFlow (M5Stack's libraries)
• ESPHome via a custom I2C component
• All M5Stack controllers with a Grove port

You also need

A controller, for example the AtomS3 Lite. Grove cable included.

Specifications

• Sensor: RCWL-9620 ultrasonic
• Range: approx. 2–450 cm
• Interface: I2C via Grove, address 0x57

Manufacturer and documentation

Manufacturer: M5Stack Technology Co., Ltd, Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China, [email protected]. EU representative: Success Courier SL, Calle Rio Tormes 1, Planta 1, Derecha, Oficina 3, 28947 Fuenlabrada, Madrid, Spain, [email protected].

• Product documentation (M5Stack)
• Manufacturer certifications (CE/RoHS)

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