The control UI on my phone

DIY Internet connected smart humidifier

I worked on creating a Internet connected humidistat last week using my open source WiFi relay project as platform. We observe quite dry air at our house, I suspect this is due to the fact that we use fan coils for heating/cooling. Humidity levels at home are usually below the 30% mark, which poses a health risk along with uncomfortably dry…

wordpress ifttt recipe

Making IFTTT (If This Then That) talk to Node-RED

IFTTT (short for “If This Then That”) is a popular service which lets you trigger actions based on certain events that occur around the Internet. It is missing an important functionality (IMHO), namely WebHooks. A WebHook is an HTTP callback: an HTTP POST that occurs when something happens; a simple event-notification via HTTP POST. I explain…


IoT tech talk recording

Thanks to all that participated in the IoT tech talk session that was held late yesterday, as promised I am adding a recording of the session It was suggested that the topic of the next hangout will be the ESP8266, I’ll set up some time and make an announcement post.   (1693)


Google video tech-talk hangout anyone?

I’ve been meaning to hold a video Google hangout session on IoT topics for some time now, how about giving it a try? I imagine it as informal 1 hr tech-talk with the following structure 35 min presentation of a certain topic by a community presenter 15 min comments, Q/A on the presented topic 10…


MQTT topic tree structure improvements

I’ve been unhappy with my old MQTT topic tree structure for quite some time now and did some thinking/research on how to improve it. Google pointed me to Tinkerman’s article on similar subject, and I started planning on improvements. I will repeat a quote I used in my last post “If you can’t measure it, you can’t improve…