Display your Todoist tasks on a Yocto-MaxiDisplay

By seb, in Programming and Internet of Things, september 18,2022.

A few years ago, we embedded a Yocto-MaxiDisplay in a kitchen. This device displayed upcoming events by connecting itself to a Google agenda. 8 years later, the system still works, but instead of displaying a calendar, we would like it to display the items of a Todoist to-do list.

A WiFi-driven LED aquarium lightning

By mvuilleu, in DIY and Internet of Things, july 29,2022.

Following an epic tadpole story that did not turn out as planned, four goldfish came into my house with their aquarium. The aquarium was second hand, so the lighting was no longer in working order. No worries, we will repair it in the Yoctopuce way...

Ventilating a room depending on the CO2 rate

By seb, in Internet of Things, january 28,2022.

This week, we are going to talk about a popular topic these days: the ventilation of a work room. CO2 being a good indicator of air "pollution", we are going to see how to automate the opening of motorized Velux skylight windows depending on the CO2 rate inside a room.

GSM power usage for sensor monitoring

By mvuilleu, in Measures, Electronics and Internet of Things, november 20,2021.

When you must design a system that sends back measures through a GSM connection, there are two physical quantities that you want to estimate: que quantity of transferred data and the power consumption. We already had the opportunity to provide orders of magnitude for data consumption in a previous post, but we are going to see today how much power is needed to send back data periodically through a 3G or 4G GSM connection.

Snooping on an RS485 bus

By mvuilleu, in Measures and Internet of Things, april 02,2021.

Some time ago, we explained how to query a MODBUS sensor with a Yocto-RS485-V2. But in some cases, you may want to monitor the measures which transit through a MODBUS communication without sending anything on the RS485 bus. It's also possible, and this is what we are going to explain today.