New: The Yocto-VOC-V4-C

By gabrielandr, in New stuff and Measures, september 04,2026.

Welcome to the Yocto-VOC-V4-C, the successor to the Yocto-VOC-V3. Following the end of production of the Sensirion SGP30 sensor, we decided to base the USB Type-C version of the volatile organic compound ( VOC ) sensor on a new sensor, the ENS161 from Sciosense. As always, the Yocto-VOC-V4-C retains the same format and software interface as its predecessor. Existing applications therefore continue to work without modification. But as a little bonus, the Yocto-VOC-V4-C offers a new air quality index.

Interfacing Sensirion SEN6x sensors

By mvuilleu, in Measures and Reviews, march 27,2026.

Sensirion offers a family of sensors designed to measure parameters relevant to assessing indoor air quality in a building. While largely similar, the various SEN6x sensors differ primarily in the air quality standard they are designed to meet and the types of measures they provide. Let's see how to interface them.

Improving the Yocto-Volt and the Yocto-Amp

By mvuilleu, in Measures and New stuff, november 21,2025.

Yoctopuce offers a number of products which can measure alternating current, including measures on the mains. To achieve sufficient accuracy in this case, the older modules apply a sliding average over several seconds. This week, we're releasing a firmware enhancement for these modules to prevent averaging from slowing down the detection of power on events.

Measuring noise and sound loudness

By mvuilleu, in Measures and Reviews, october 24,2025.

A sound pressure sensor, or noise sensor, is one of those sensors that we've been asked for several times, but don't yet offer. The small on-board processors we use in our modules don't have the computing power to make this measurement, and until now we haven't found an external component we could integrate that met our quality criteria. But there is hope that this will change...

How to sort objects by color?

By Tiago, in Measures and DIY, october 03,2025.

A few months ago, Yoctopuce launched a color sensor based on the spectral analysis of light. This module not only provides raw measures, but it also estimates the color of the object that produced the measured spectrum. As there is no mathematical formula directly applicable to this task, this feature has required a fair amount of experimentation to verify the reliability of the obtained results. Today, we present one of the test methods we used.