sparkfun Qwiic - User Manual

Qwiic Human Presence Sensor (AK9753) Hookup Guide


Introduction
The AK9753 Human Presence sensor is a Qwiic enabled, 4-channel Nondispersive Infrared Sensor (NDIR). Each channel has a different field of view,
so not only can the AK9753 detect a human, but it can also tell which direction the person is moving.
This hookup guide will show you how to get started taking basic reading from the sensor. We will cover both a serial output of readings as well as nice
graph of the derivative of our readings from a single channel.
Required Materials
To get started, you’ll need a microcontroller to, well, control everything.
SparkFun Human Presence Sensor Breakout - AK9753
(Qwiic)
 SEN-14349
Product Showcase: Qwiic Presence Sensor & OLED

sparkfun Qwiic Specifications

General

Interface	I2C
Connector	JST
Voltage	3.3V
Compatibility	Qwiic-enabled devices
Cable Length	Varies by cable

Summary

Introduction

Required Materials

Hardware Overview

Optional Features

Switch Mode

Hardware Assembly

Software

Example 1: Basic Serial Readings

Example code for taking basic serial readings from the Human Presence Sensor via serial output.

Example 2: Graphing the Human Presence Sensor Serial Data

Code to display sensor derivative on serial plotter, adjust sensitivity.

Resources and Going Further