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.
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.
Many houses were built before the Internet of Things and sometimes we need to convert old, but working, installations in order to monitor them remotely. It's the topic of this week's post. We are going to add a YoctoHub to a Straton furnace in order to receive an alert when the furnace goes out of order.
A few months ago, a small feline has taken up residence next to Yoctopuce and sometimes comes to visit. So that it can come in and out freely during the day, we installed a microchip cat flap which we can control remotely. When we installed it, we thought that there was bound to be some interesting tinkering that we could do with the cat flap and some Yoctopuce modules, and there we are...
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