Application Notes

AN-10 API Interface – simple API interface details for configuring and controlling the OPS241, OPS242, and OPS243 as well as system level products OPS7242 and OPS7243 (video).

AN-11 Cosine Error – explains the cosine error related to the reported speed (video).

AN-12 Android Phone Radar Gun – how to enable an Android phone radar speed gun to read data from an OPS241-A, OPS242-A or OPS243-A.  The app is available from the Google Playstore. (video)

AN-13 Code Update – describes procedures for updating OPS241, OPS242, and OPS243 with new code versions (video).

AN-14 UART Interface and Arduino Support – UART interface described along with how to interface OPS24x sensors to Arduino.

AN-15 Simple Motion Detection Interrupt – new interrupt pin triggers when motion detection detected meeting speed, direction, and magnitude filter settings.

AN-17 Simple Counting Algorithm – explains new simple algorithm to count objects over time in the radar sensor field of view.

AN-18 Low Power Battery Operation – details how to use Hibernate mode, what levels of power consumption can be expected, and how to calculate overall system power.

AN-19 Traffic Monitor Mounting Guidelines – provides guidance on mounting OPS24x radar sensors for traffic monitoring application.  Use the OPS243 Field of View Calculator to determine center point of the field of view.

AN-20 IoT Radar Sensor with WiFi Interface – description of connecting to a WiFi network using the new app and MQTT X tool.  The app is available from the Google Playstore.  An alternate EspBlufi iOS app can be used to make the sensor to WiFi connection.(video)

AN-21 Vehicle Classification – new OC command in API provides parameters for use with machine learning (ML) vehicle classification and lane detection.

AN-23 Alerts and Data Capture Synchronization – explains how to link radar data capture with other sensors such as a camera and usage of Alert messages for speed and range data.

AN-25 Node Red Traffic Monitor Dashboard – describes setting up a Node Red dashboard linked to an OPS243 for remotely reporting traffic speeds and counts.  Download the Node Red flow here for importing into Node Red (change file extension from .pdf to .json first).

Software Support/Tools

Github Projects – Download projects to connect OPS241, OPS242, and OPS243 to Arduino, Raspberry Pi, display data on an LCD, or connect to an Android phone.

Datasets – Test data from OPS24x sensors with FFT data for additional processing and analysis.

USB Driver – Typically the USB driver in Windows, Mac, and Linux computers will automatically connect to the OPS241 and OPS242 radar sensors.  If they do not, this driver may be installed on your computer to make a connection.

ROS Package – Details for the ROS (Robot Operating System) package and support for Kinetic, Lunar, and Melodic releases.

OPS243 Field of View Calculator – input height, down angle, and in road angle to calculate the field of view center point.

Fritzing Files for OPS243 – load an OPS243 as a part into Fritzing for connecting to Arduino designs.

University Research Projects

Soil Water Content Estimation over Plantation Area Using FMCW Radar, Fildha Ridhia1, Telkom University, Indonesia. July 25, 2023

Detecting Targets by 24GHz FMCW Radar Technique, Suranaree University of Technology, SEATUC 2023, February 22, 2023

Radar-based Monitoring System for Medication Tampering Using Data Augmentation and Multivariate Time Series Classification, University of Maryland Baltimore County, November 26, 2021

OmniPreSense Speed Radar Implementation on PX4 Environment, Eastern Mediterranean University, September 14, 2021

Creation of a Sport Backstop Using Axiomatic Design, Worcester Polytechnic Institute, May 5, 2021

Smart Homes that Detect Sneeze, Cough, and Face Touching, University of Maryland Baltimore County, December 13, 2020

Have a project using an OPS24x radar sensor you’d like to share?  Let us know about your project and your published results.

Firmware Releases

Contact Customer Service to request the latest code file.

DeviceLatest Code VersionKey Update
OPS241-A/ OPS242-Av1.4.2Fix for JSON message NULL reporting.
OPS243-Av1.2.1Added OC command for vehicle classification, lane detection, RTC check.
OPS241-Bv1.0.6Adjustable chirp configuration, serial number, mnfr. date, custom label
OPS243-Cv1.2.5Added OC command for vehicle classification, lane detection, RTC check.