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March 2, 2017June 18, 2018 by Karl Johnson - 11 Comments

Karl’s Home Automation Project – Part 2: 433 MHz / WiFi MQTT Bridge, Door & PIR Motion Sensors

Karl here again for part 2 of my home automation project. We will be looking at how to automate your lights based on time of day and motion. In the first part we setup Home Assistant and uploaded firmware to basic Sonoff Wifi switches. Today we will setup a 433 MHz to MQTT bridge and some sensors. 433 MHz Depending on your country 433 MHz is an open frequency to use to communicate with. There are hundreds of different types of devices that use 433 MHz to communicate information. We will be focusing on 2 today from Gearbest: WMS07 motion sensor (left) and WDS07 door/window sensor (2 parts, right). I am not taking the door/window sensor apart, since it is super basic, but I’ve included some photos of the PIR motion detector. 433 MHz Bridge While contemplating how to get presence on a per room basis I ran across this […]

June 30, 2016June 30, 2016 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Infineon Showcases the Radar Board used in Google’s Project Soli, and Sense2Go Development Kit (Video)

Google’s Project Soli sensing technology uses a miniature radar to detect touchless gesture interactions, so that you can control devices such as wearables using gestures without having to physical touch the product. The 60 GHz radar technology used in the project has been developed by Infineon, and the company was recently interviewed by Arrow Electronics where they showcased Soli board, as well as another 24 GHz radar development kit called Sense2Go. The Soli board called BGT60TR24 features Infineon XMC4500 ARM Cortex M4 MCU, and a 60 GHz “CRIS20” radar chip designed specially for Project Soli by Infineon, and allowing 20mm resolution, falling to less than one millimeter with Google’s algorithms. The micro USB port will be used for power and programming. This board should be the one included in Project Soli development kit to be shipped to developers this fall. Infineon also have a Sense2Go 24GHz sensor development kit that […]

April 4, 2016April 4, 2016 by Jean-Luc Aufranc (CNXSoft) - 20 Comments

Tiny Microwave Radar Module Detects Movements Up to 9 Meters Away for $2

PIR sensors are used to detect motion for example to turn on or off a light bulb when motion is detection. One such sensor is HC-SR501 motion detector, which costs around $1, and is tiny (32 x 24 mm), but not quite thin due to the design that needs to capture infrared light, with an height of around 2 centimeters. If you’d like something almost as cheap, just as small, but much thinner, microwave radar modules could be a good alternative. XYC-WB-DC is one of those modules with the following specs: Operating Frequency – 5.8 GHz Detection angle – 360° Detection range – 6-9 meters Working Voltage – 3.3-20VDC; Standby current – <3mA; Transmit power – <2mW; Dimensions – 32 x 23 mm Operating temperature range – -20 ~ +80 Centigrade; Potential advantages over PIR sensors include wider detection angle, and lower power consumption, HC-SR501 datasheet reports respectively 120 degrees […]

September 26, 2015July 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 40 Comments

How to Use Orange Pi Camera in Linux (with Motion)

Earlier this month, I wrote a Quick Start Guide for Orange Pi Allwinner H3 boards such as Orange Pi PC, and showed how to install and configure Debian on the boards. I’ve also received the $5.90 Orange Pi camera, which when combined an Orange Pi PC, costs around $27 including shipping. So today, I’ve attached the CSI camera to my Orange Pi 2 mini board, and used it with motion to transform for the board into an IP camera. First, you’ll need to insert the camera into CON1 connector with the camera facing the ceiling, and close the black clip to keep it in place. Now connect all cable and power on your board. First, I studied the steps described on that forum thread, and modified Allwinner configuration files, but after one or two hours, I found out some work at been done since May, and it was now much […]