DomoticsDuino by Marco Lamanna

Video update on my OpenHAB 4 setup.

I decided to switch to text file configuration. I like MAIN UI but when you reach a big number of items to manage I think it's better using text files than UI.

For this purpose I am writing a software that will be able to automatically recreate the files via API, reading things, channels, groups and items from the OpenHAB configuration.

I'm developing it and it's written in PHP; using a docker container for its execution environment.

Enjoy your viewing

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Let's continue the miniseries dedicated to MQTT, within the OpenHAB in a Nutshell series and see how to install the open source broker MOSQUITTO on Windows.

Let's download the installation package from the official mosquitto website and install it on our Windows system. Then we run it with the default options and through MQTT Explorer and command line tools we perform connectivity and message sending/receiving tests.

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Let's begin a new miniseries within the OPENHAB in a Nutshell series, dedicated to the MQTT protocol, widely used in IoT systems for its technical characteristics that make it the ideal protocol in these areas.

Let's start with an introduction to understand together what the MQTT protocol is and what its characteristics are.

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In this new video we resume the project of the swimming pool control unit by assembling a rough but functional prototype.

The components used are:

• ESP8266 NodeMCU Lolin v.3: MCU with integrated Wifi
• TDS Meter: water quality
• PH Probe PH-4205C: PH sensor
• Analog Digital Converter ADS1115: Analog digital converter to to increase the number of analog inputs of the ESP8266 (which has only one) and to improve its acquisition
• 2 x DS18B20 Waterproof temperature sensors: to get water and air temperature

I finally tested the physical and electrical connections with a relatively simple program that prints the data from the temperature sensors and the 4 analog inputs of the ADS1115 on serial.

The final goal will be to write a program to calculate the PH and TDS values ​​and send them, together with the temperature data, to the MQTT broker and then receive them on OpenHAB

Enjoy your viewing

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New video of the OPENHAB in a nutshell. We always talk about physical device integration, but this time we use a vertical binding dedicated to XIAOMI products.

By vertical binding I mean a binding that allows you to integrate devices of the same type or brand.

Normally this type of binding is a bit more closed as it does not allow many customizations, compared to a horizontal binding which is much more open and configurable (such as MQTT binding)

Let's try the integration of the MI Robot Vacuum, produced by Xiaomi, using the official Xiaomi Wifi devices (Mi IO) Binding

Enjoy your viewing

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New video of the OPENHAB in a nutshell series. We talk about the integration of physical devices using MQTT binding as an example of horizontal integration

Let's do a couple of examples with two sensors of different nature and typology, using the same integration methodology.

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New video of the OPENHAB in a NUTSHELL series. Let's talk about the integration of physical devices using Bindings.

Let's see the different types of bindings

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Calibration of the PH 4502C probe, using a PH 9.18 solution to define a second calibration point, in addition to the PH 7 point already defined in the previous video.

I update the sketch with the final PH calculation formula and display the value on the LCD display.

For the Arduino sketch I took inspiration from this page: https://www.e-tinkers.com/2019/11/measure-ph-with-a-low-cost-arduino-ph-sensor-board

Enjoy your viewing

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In this new video I take up the project of the swimming pool control unit again, starting to test the PH probe purchased on Aliexpress, based on the PH-4502C board.

I used an Arduino UNO, connected to an LCD display for real-time display of the detected values.

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In this new video of the OpenHAB in a nutshell series, we always talk about SEMANTIC modeling from a practical point of view, going to do a Refactoring of an already existing non-semantic model.

Let's transform the existing Items into Points and create the respective Equipments to insert into the model, within the Locations.

Once finished, let's see how the dynamic home page has evolved accordingly.

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In this new video of the OpenHAB in a Nutshell series, let's see in practice how to do SEMANTIC modeling in OpenHAB, starting from scratch.

Let's create Locations, Equipments, Points with Properties and see how OpenHAB automatically configures its Home Page, based on the implemented semantic model.

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In this new video of the OpenHAB in a nutshell playlist, let's introduce the concept of SEMANTIC MODEL in OPENHAB.

After having seen what groups and tags are, used as basic concepts of semantic modeling, let's talk about the semantic model on a theoretical level, trying to understand what it is and why it is important to use it.

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In this new video of the OpenHAB in a Nutshell series, let's introduce another basic concept of semantic modeling: TAGS

After seeing what tags are and what they can be used for in OpenHAB, let's look at some examples together.

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In this new video of the OpenHAB in a nutshell series, I talk about the concept of group, the object that is the basis of semantic modeling.

After a small theoretical introduction, let's see together a practical example of configuring a group, starting from its creation up to the management of its value.

Enjoy your viewing

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