We all agree – HTTPS – the encrypted communication between WWW-browsers and servers – usually makes sense. However – under the cover of secure communications, some folks have silently pushed their version of rules into our life. And that makes things complicated – to say the least. Read More →
There are a few ways to measure power consumption, voltage or current with an Arduino. Unfortunately, the ESP8266 has a few limitations that make it somewhat difficulty to get things going. Let’s look at an easy way to achieve our task.
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While the LUMOSUR environment does it’s thing based on sensors, touch screens and mobile controllers, voice control is also a part of the mix. We are not developing an Alexa clone and you won’t be able to order a pizza through LUMOSUR, but you can entrust it with your home automation, air conditioners – even door locks – because it doesn’t require any cloud- or even Internet connection. However – a good microphone is required to reliably recognize voice commands. So – we tried the ReSpeaker v2.0 microphone array. Read More →
Home automation is cool. It really is. Switch power and or off, lights come on with a touch or voice command, everything can be controlled from everywhere. Well – sometimes. Or not. Because there’s a big fight going on below the deck. And you may want to wait who wins. Read More →
Whenever you work in a local environment, you have to deal with a variety of problems. From setting fixed DHCP leases to creating special name server entries. Sometimes it is helpful to have a reflecting name server. Read More →
After having been working with voice controlled or .. voice activated “smart” environments for a while, here’s my take: This could get really great if .. and that’s a big if .. we find a common protocol that enables flexibility, compatibility and true interactions. Read More →
Some folks actually have a weird attitude towards PHP. I understand that it isn’t a “pure” language. It’s not truly “objective”. It’s inconsistent. Too many functions. Whatever. For me it’s still the Swiss Army Knife of programming languages (after “C” of course). Read More →
So – you got this Amazon Alexa device at Cyber-Monday? And maybe a connected “smart” plug or light bulb? Before you start adding more “smart” stuff – here’s what you need to know. Read More →
Yep – those little ESP chips are cute. And powerful. And easy to program. And much more. But if you are going to control more than – say a closet light – you want to think about security. This requires hashes and tracking of the current time.
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Sometimes we have to send short command sequences and/or replies over unprotected networks. Especially when working with IoT environments. Though SSL/TLS is always preferred – sometimes it’s just too much overkill. Read More →