Today, you probably don’t think much about object-oriented programming, it’s just part of the landscape. But decades ago, it was strange and obscure technology. While there were several languages that led up to the current object-oriented tools we use today, one of the most influential was Xerox PARC’s Smalltalk language. [Michael Engel] took a C++ […]
MAKING SMALLTALK ON A RASPBERRY PI Read More »
Capturing real data (RPi/DHT22), saving them in a database (SQLite), creating graphs (Matplotlib) and presenting them on a web page (Flask). Introduction: From Data to Graph. a Web Jorney With Flask and SQLite On my previous tutorial, Python WebServer With Flask and Raspberry Pi, we learned how to interact with the physical world, thru a web
From Data to Graph: A Web Journey With Flask and SQLite Read More »
How to measuring the air quality of the Open Data Institute using an Arduino and a Shinyei PPD-42. Introduction So, whilst thinking of a good demonstration for the Opensensors platform, we thought why not see how polluted our workplace is by hooking up a sensor to publish a continuous data stream to the Opensensors messaging
How to Measure Air Quality on OpenSensors Read More »
View current weather data by using the OpenWeatherMap API along with the new Raspberry Pi 4. Premise Gathering real-time weather data that has a lot of detail for a project can be difficult. Several web APIs exist, but many require payment use, or are complicated to set up. Thankfully, OpenWeatherMap.org has an amazing API for
Real-Time Weather with Raspberry Pi 4 Read More »
Over the last few years, the price of a good digital picture frame has dropped to the point that we don’t often see DIY versions anymore. As much as we might hate to admit it, it’s hard to justify building something yourself when the economies of scale have made it so you can buy the
A MINIMAL ESP8266 DIGITAL PICTURE FRAME Read More »
Raspberry Pi communication with KNX bus using Wienzierl BAOS 838 kBerry module. bobaos-project Hello, friend. I would like to introduce you bobaos-project, JavaScript library implementing KNX ObjectServer Protocol for KNX BAOS Module 838 kBerry. The main purpose of project is to bring modern JavaScript with it’s infrastructure into KNX and world of BAOS. Installation Prepare your Raspberry Pi:
Customized ceiling screen, capable of playing videos, color picker, and color temperature using Raspberry Pi and a web-based GUI. Overview This project consists of a ceiling mount consisting of 4,661 NeoPixel LEDs powered by a multiple 5V power supply, 10 Fadecandy NeoPixel driver boards and a Raspberry Pi 3 Model B+. This LED ceiling mount
4,661 NeoPixel WS2812B Ceiling LED with RPi and 10 Fadecandy Read More »
128×32 pixel LED Matrix with Raspbberry Pi 3 and Windows IOT Core. Story One of our clients in food industry had a special need to display some information in real-time. We had different options to work on this project like using a 7-segments or use a very big TV, but the best option was to use
32×32 Chained LED Matrices with Win IOT Core on RPi3 Read More »
Support for Software PWM is available for Windows IoT Core and the Raspberry Pi using a convenient NuGet Package. Story One of the gaping holes in my opinion is the availability of PWM when working with Windows IoT Core on the Raspberry Pi. There are two approaches to solving this problem, one is with additional
Windows IoT Core: Software PWM on the Raspberry Pi Read More »
Identify Cars Using Raspberry Pi Description The principle of operation: The car drives up to the gates. Camera reads the car plate numbers. Checks the read number with the database; if it finds one, then it opens the gate and lets the car pass. Each car at the gates is photographed, then a photo is
