This Arduino code ... is based on the sensor's pulse duration. An assistive walking stick prototype designed for visually impaired individuals. This smart stick uses ultrasonic sensors to detect ...

The smart blind stick utilizes ultrasonic sensors to detect obstacles within a range of up to 2 meters and provides feedback to the user in multiple forms to alert them of nearby obstacles.

First up, Bloomberg reports that the HomePod mini has a sensor for temperature and humidity that's not currently active, but that Apple could turn on to boost the devices smart home credentials.