AN-000226 – CH201 Ultrasonic Presence Detection Reference Design User Guide

This document details the specification, the programming and operation of a CH201 ultrasonic senor and M0 MCU Module Reference Board. This module reference board incorporates a M0+ ARM Core IC and a CH201 Ultrasonic Sensor with acoustic housing assembly. When programmed with Chirp’s Presence Detection firmware, the module shall operate as a motion detection device, signaling the detection of motion via a GPIO line.