Following last week's article, here is a small real-world application using HTTP callbacks to drive Yoctopuce modules through a NAT filter. We will use here a Raspberry Pi because it's cheap and we don't need too much out of it: only to run a VirtualHub to generate periodic callbacks.
When you install a home automation system at home, a common problem is to control it from outside. Indeed, network connection through a DSL router usually protects the home network through an address translation mechanism (NAT). This renders local machines invisible from the outside. Today, we present a solution to work around this issue without lowering the security of your private network. A practical example in home automation will follow in the post of next week.
Last week, we built an anemometer allowing you to measure wind speed by USB. This week, we describe the complementary tool: a wind vane allowing you to know the wind direction. With USB reading of course, otherwise it's not fun.
Yocto-Meteo owners regularly ask us if Yoctopuce intends to put on the market a sensor to measure wind speed. The problem is that an anemometer contains more mechanics than electronics. We looked at some models available on the market. We concluded that the cheap anemometers were too difficult to hack and that the models designed to be interfaced were way too expensive. We are therefore going to tell you how to create your own anemometer using a Yocto-Knob.
Yet another year, and enjoy a fresh new batch of firmware releases. We will take this opportunity to review the various methods available to upgrade the firmware of your Yoctopuce devices, either manually or automatically.
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