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A quick tutorial on I2C

By mvuilleu, in Measures and Internet of Things, july 19,2024.

Many sensors on the market use an I2C interface. The datasheets for these sensors usually simply recall how an I2C bus works by copying and pasting the original Philips/NXP specifications, but for engineers implementing PC- or Internet-based automation solutions today, this isn't necessarily the most relevant explanation. So here's our crash course for new I2C users.

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Integrating an M-Bus meter in Home Assistant

By mvuilleu, in Internet of Things and Measures, july 12,2024.

M-Bus (also known as Meter-Bus) is a standard dating back to the '90s, designed for reading water and power meters. A wireless variant using the same data coding was later defined, but for this post we'll focus on the original version, which powers and reads up to 250 meters over 1 km, linked by a single pair of twisted wires.

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Testing the SenseCap S700 V2 weather station

By Tiago, in Reviews, Measures and Internet of Things, june 28,2024.

A few weeks ago, we presented the Yocto-SDI12 which communicates with SDI-12 sensors. Today, we're going to use the Yocto-SDI12 to retrieve measures from Seed Studio's integrated SenseCAP S700 V2 weather station and display them using Yocto-Visualization for Web.

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Measuring high concentrations of CO2

By martinm, in Measures and Programming, march 15,2024.

The Yocto-CO2-V2 can measure concentrations up to 40000ppm or 4%, but we're sometimes asked if there isn't a model capable of measuring higher concentrations. The answer is no, but on the other hand, it's easy enough to use Yoctopuce modules to interface other CO2 sensors, such as the K33 ICB-F from Senseair, which can measure CO2 concentrations of up to 10%.

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pH probe calibration

By mvuilleu, in Measures and New stuff, february 09,2024.

Ten years ago, we published a post showing how to use the Yocto-milliVolt-Rx-BNC with a pH probe to digitally extract measures. Of course, the 2014 module still works today, but in the meantime we've released a few tools which make using it even easier. So here's an update to this post...

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