The
Atom server I added to my home network is finally installed in the rack
and I've begun moving storage over to it and off the rather overloaded
home automation server. The 1U immediately below it houses 4 SATA drives
(mostly 2TB now) with USB/Firewire connections. Readers of my blog will
recall my disdain for RAID as a "backup" technology (it's for
availabilitynot backup) so the storage scheme I used is original
->backup -> second backup so there are three copies of everything.
The Atom server is running 64-bit Windows Server and seems surprisingly
fast. I plan to run MongoDB on it too.
Digital Twin are an online representation of a real world object, a copy of its properties in the digital world and a way to send updated and commands to it. In effect I've been making them for years but now they have a trendy name.
Why automated learning is hard for a smart home. The perils of over-fitting, under-fitting and how the general unpredictable nature of life makes it hard to build a system that learns your behavior.
One way to reduce the volume of sensor data is to remove redundant points. In a system with timestamped data recorded on an irregular interval we can achieve this by removing co-linear points.
Home automation systems need to respond to events in the real world. Sometimes it's an analog value, sometimes it's binary, rarely is it clean and not susceptible to problems. Let's discuss some of the ways to convert these inputs into actions.
Another super useful function for handling sensor data and converting to probabilities is the logistic function 1/(1+e^-x). Using this you can easily map values onto a 0.0-1.0 probability range.
In a home automation system we often want to convert a measurement into a probability. The ATAN curve is one of my favorite curves for this as it's easy to map overything onto a 0.0-1.0 range.
Several years ago we did a major remodel. I did all of the finish electrical myself and supervised all of the rough-in electrical. I also put in all of the electrical system and water in our barn. I have opinions ...
The
Atom server I added to my home network is finally installed in the rack
and I've begun moving storage over to it and off the rather overloaded
home automation server. The 1U immediately below it houses 4 SATA drives
(mostly 2TB now) with USB/Firewire connections. Readers of my blog will
recall my disdain for RAID as a "backup" technology (it's for
availabilitynot backup) so the storage scheme I used is original
->backup -> second backup so there are three copies of everything.
