RF 433Mhz to MQTT Gateway

By |January 2nd, 2016|Arduino, Tech, Uncategorized|

I've upgraded my domotica setup with a Philips Hue. Before I switched the lights using a remote control or via Node-Red and using the cheap 433 Mhz wall outlet switches of Elro, Klik Aan/Klik Uit, Action, and so on. Since the install of the Hue I was missing the remote control to easily switch the [...]

Login for Node-Red on TheThingBox

By |December 20th, 2015|Uncategorized|

Secure your Node-Red install of TheThingBox with a login dialog to prevent unauthorized access.

The Things Network – LoRaWAN

By |October 31st, 2015|Uncategorized|

We are at the start of a worldwide roll-out of a global open crowdsourced Internet of Things data network. If you have any interest in IoT or want to be part of the beginning of something big, check out the page that explains all, The Things Network. In short the guys behind this build a wireless [...]

Mohio – Visualize your Cloud

By |August 6th, 2015|Lifehacking, Tech|

I'm a big fan of Evernote and sometimes I just go through my notes, notebooks and tags to clean things up. Sometimes I then just check Google to see if people have good suggestions related to what I'm doing. In this case, I came across a site called where you can connect some of [...]

MQTT Data display using ESP8266 and OLED display

By |July 20th, 2015|Arduino, ESP8266, Uncategorized|

Oled display connected via SPI to NodeMCU Development board containing ESP8266 (type 12) = the silver square and FTDI for easy USB connection. Finally I made some time to play a couple of hours with a new type of microcontroller that offers a lot of possibilities. Especially for Internet of Things purposes! I'm [...]

Mac OS X – write images to SD Card with high speed

By |February 13th, 2015|Computer How-To, RaspberryPi, Tech, Uncategorized|

Writing SDCard images using my Macbook took way to long, up to half an hour to write one simple Raspberry Pi image to a SDCard. I just did what many instructions told me to do. You will probably recognize this command: dd if=/path/to/image/file.img of=/dev/disk3 bs=1m  (where /dev/disk3 depends on your system). Then I came across [...]

Update OMD 1.00 to 1.21 on Raspberry Pi

By |February 2nd, 2015|Computer How-To|

Today the new Raspberry Pi 2 model B was announced. ARMv7 CPU with 1 Gb of memory. This made me search for OMD (Open Monitoring Distribution) for ARMv7 (Which can be found here). While searching I stumbled upon an update OMD 1.21 for ARMv6 which is the original Raspberry Pi. I have two Pi's running. [...]

Limit SD Card writes on Rasberry Pi using Ramlog

By |January 17th, 2015|Computer How-To, Tech|

A SD card has a limited amount of writes it can handle. The Raspberry Pi will write to log files a lot and reduce the lifetime of your SD Card. Update 3-2-2016: RamLog seems not to be compatible with Debian Jessie. I haven't tried it yet but I have found a blog that might offer [...]

Raspberry Pi Open Monitoring Distribution setup guide

By |January 2nd, 2015|Computer How-To, Tech, Uncategorized|

I use a setup of some Raspberry Pi's to monitor my own systems and some systems of my customers. My main goal is to be informed on system status (warnings and criticals) via one portal and preferably before my customers notice incidents on their systems. There is no need for expensive and energy consuming systems [...]

Polyes Q1 – The safest , Cool-ink 3D Pen

By |January 1st, 2015|3D Print, Gadgets, Tech|

On Kickstarter I found a nice project. The Polyes Q1 3D pen! Polyes is the first 3D printing pen with blue light and real inks. Using this pen you can draw objects in 3D space. The ink is hardened using an UV or Blue led light. They offer all kind of inks, from colored inks [...]