10002 The hidden database

A long due update A while back I setup influx DB to store the sensor and activity data on my smart home system. And i thought the raspberry pi 3 was not enough to run the server anymore. And moved to a NUC and all was fine. But recently I wanted to upgrade from Ubuntu 18 to 20 and thought about making an image of the SSD first, as a quick and easy way to… Continue reading

Ikea TRÅDFRI review

Intro Part of my home automation project I would have some controllable lights, of course. On one hand, I used quite a few LED strips, controlled by dimmer modules. On the other, current technology allows for a plethora of wireless light bulbs.  Philips HUE is probably the biggest and best known because it has existed for quite a long time, but I am not that attracted due to the price. Once Ikea came up with… Continue reading

TP-Link KL50 smart light bulb teardown

Intro When I saw this KL50 wifi light bulb on sale, I thought I want to grab one and see what is inside. A quick search revealed no details about the insides of filament WiFi light bulbs. Short review The light worked well from the start, discovering and connecting it through the WiFi was straight up. It does what it promises, quite a nice diffuse and rather warm light. I have slightly colder lights in… Continue reading

10002 I2C connectors

Intro In my first iteration of sensors I relied on wire connections between sensors and the actual node board. The result for a motion sensor and a temperature and humidity sensor looks like this The problem with that is that during sensor modules assembly run I spend quite a bit of time on the wiring. On top of that, the result is a mess of small wires inside a box. It makes it hard to… Continue reading

10002 Screens and controls

Intro There is no point in having a smart home if you don’t see interesting information or control things. The traditional way, ever since the concept of smart home came to be, is to have some sort of central control panel for everything. In today’s world, that would be a tablet. In my attempt to do that, I ran into the control panel horror. What else? In parallel to this, I thought about the idea… Continue reading

10002 Zen

Zen At some point I though about building the smallest PCB for a sensor node that I could. Hence, the ZEN was born. The PCB is small enough to fit on a holder of 2 AA batteries. Where I have only build a few of these. Here is one reading the soil moisture sensor on basil. Here is another one chilling in the fridge, reading a temperature sensor. And here is one replacing the alarm… Continue reading

10002 Motion sensors?

Motion sensor madness Picking the right one for my smart home project is not trivial. From left to right – Osram Nightlux, Ikea Molgan, Ebay sensors with sensitivity and timing adjusment (BISS001), smaller ebay sensor with no adjustment, another ebay sensor. As you can see I have looked at 2 different options: use a ready made sensor and fit it with a radio, or build my own. Ikea Molgan I hacked one a while ago –… Continue reading