SparkFun Qwiic Ultrasonic Distance Sensor - HC-SR04

The SparkFun Qwiic Ultrasonic Distance Sensor - HC-SR04 is a modernized version of the classic HC-SR04 distance sensor, renowned for its non-contact distance readings ranging from 2cm to 400cm. This updated version is equipped with a pair of Qwiic connectors, enabling communication over I²C and the ability to daisy chain any other Qwiic product of your choice.

For those who prefer direct access, this ultrasonic sensor also provides VCC, Trigger, Echo, and Ground pins broken out on the edge of the board. However, please note that this sensor comes uncalibrated, requiring manipulation of the raw output to suit specific applications.

The SparkFun Qwiic Connect System is a comprehensive ecosystem of I²C sensors, actuators, shields, and cables designed to streamline prototyping and minimize errors. All Qwiic-enabled boards utilize a common 1mm pitch, 4-pin JST connector, which not only saves valuable PCB space but also ensures error-free, polarized connections.

The package includes one Ultrasonic Distance Sensor - HC-SR04 and one Right-Angle Header - 4-pin.

The sensor operates at a voltage of 3.3V, with a detecting angle of 15 degrees. It maintains an impressive range of 2cm to 400cm, with an accuracy of 3mm. The board is equipped with an STM8L051 MCU and has a default I²C Address of 0x00. The dimensions of the sensor are 21.5 x 45.5mm, and it weighs 9.2g.

For additional information and guidance, you can refer to the schematic, eagle files, datasheet, and hookup guide provided. There's also a Github page with eagle files and example code available.