Humidity-sensitive ventilation and Home Assistant

By mvuilleu, in Measures and Internet of Things, january 10,2025.

When insulating a house as part of an energy-efficiency renovation, it's essential to provide ventilation to evacuate any moisture that might accumulate inside. Since it's generally not possible to install a double-flow ventilation system after the fact, the recommended method is to use humidity-sensitive ventilation, which selectively ventilates the rooms that need it most. But does it really work? Let's find out with Yoctopuce modules and the Home Assistant home automation platform.

Wind speed measurements

By mvuilleu, in Measures, october 18,2024.

Today we present an application for the Yocto-RS485-V2, for which we provided assistance to one of our customers. The aim is to collect data measured by a Gill WindSonic ultrasonic wind sensor, and extract key values in accordance with World Meteorological Organization (WMO) standards.

Upcycling an old fan

By mvuilleu, in DIY, Internet of Things and Measures, september 27,2024.

Almost ten years ago, we showed you how to combat humidity in a room using humidity-controlled ventilation. The system described had just then been installed in a cellar, where it worked efficiently until very recently. Unfortunately, the discovery of mold alerted us to a problem, and a quick check revealed that the system had broken down: the fan controlling the air intake had died.

Optimizing automatic watering using sensors

By mvuilleu, in Measures, august 16,2024.

At the beginning of the Summer, we showed you in this blog the installation of a SenseCAP S700 V2 weather station with the aim of collecting data to optimize the watering of a vegetable garden. After a few weeks of measures, it's time to analyze the data collected to see whether or not it provides any useful information...

Testing the Renesas FS3000 air speed sensor

By mvuilleu, in Reviews and Measures, july 26,2024.

Renesas recently released a new I2C sensor that caught our eye: a tiny miniature sensor for measuring airflow velocity. It's a measure we're interested in, because many industrial processes need well-regulated ventilation to run reproducibly, and progressive clogging of filters can significantly affect ventilation capabilities. Let's take a look at this sensor...