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Category: IoT

After trying out different components, I finally decided to look on EPS8266 as the main platform of implementing my IoT use cases. In doing so, I decided to work with Wemos chips, since they are pretty and provide the functionality I need at very low cost. These are:

  • boxed ESP8266
  • USB mini power supply
  • shields with different functionality
  • can be ordered by aliexpress

I ordered the following modules at aliexpress:

  • Wemos D1 mini (v.2.0, 4MB) (around 2,50 USD)
  • Reed switch (e.g. this one ) (around 2 USD)

After several weeks of traveling over the oceans my parts have arrived and I began to build my solution for gas consumption measuring.

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OpenHAB Ansible Docker

Since some times I’m building a smart home based on OpenHAB. After playing around with local installation and an installation on the Raspberry PI, I decided to change the hosting platform. I’m running a full-fledged HP Proliant G6 server at home (for some other reasons) which has Debian 8 installed on it. For all systems provisioned, I’m using Ansible and Docker. This article gives some insights in the installation.
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During last weeks, some local building contractor was involved in reconstruction of our house and renewing the basement drainage. As a result the new basement drainage has been installed and a new hopper for the sewage pumps has been placed. To be honest, it is a lot of heavy work, performed by the builder including digging, insulating, pounding and other dirty staff – but after all the system works if sewage pump is removing the drainage water. In constrast to the earthworks, where you need much experience and human force, which I don’t have, I took over the plumbing and electrical work on the pumps. In order to have a fail-over system, I installed two pumps, where the second pump is triggered if the first one fails. In order to be able to operate on a short circuit of the first pump, I put the second pump on a separate phase (in Europe, we have three phases power supply, 220V each, shifted by 120° to each other, not like split-phase in US). Having this system installed, you get some periodic work to do: finally you want to make sure by regular testing procedures, that the second pump is operating if the first one has failed. Since I’m lazy and like inventing and constucting stuff more than executing regular test procedures, I decided to implement a monitoring system using some cheap electronic and computer components: Raspberry Pi, Tinkerforge Hardware. continue reading…