ESP8266/Arduino: processing huge JSON objects directly on the ESP

For a while now I wanted to improve my weather station project by adding more sources of information that can be displayed. But these sources I had in mind [...]

ESP8266/Arduino: Playing around with the upcoming filesystem feature

I recently stumbled on a feature that hopefully soon will be integrated into the stable release of the ESP8266/Arduino environment: a file system [...]

ESP8266/Arduino: MAX7219 8×8 Led Matrix Library

Twice a year the company I work for (Netcetera) organizes a retreat for programmers, usually in the mountains. In the Spring issue this year we went to a [...]

ESP8266, Arduino, Raspberry Pi: introduction to IoT hardware

Checkout my presentation about [...]

ESP8266: Using a seeeduino to talk to the ESP8266 module directly

I recently received two of these shiny new Wifi modules from China and had to test them out. In many posts around the web they say you should use a [...]

DevDuino Sensor Node – Part 1 – Programming the DevDuino

It took me far too long to get this working, but I finally did it: a small Arduino compatible board called "DevDuino" running on a CR2032 cell battery is [...]

Turn on/off USB Power on TL-MR3020 running OpenWrt to restart Arduino

In a later blog post I will describe how I am using a TL-MR3020 router as low-cost wifi shield for my Arduino to transmit sensor data over wifi. In this post [...]