Rafał Warzycha - techblog

ESP32 and cloud IoT - "Hello world" in ESP32 IDF

In this tutorial, I will walk you through all steps required to build, flash, and monitor your own firmware.

ESP32 and cloud IoT - Setup and pre-work

As I promised in my workshop during "Lodzkie Dni Informatyki," this is the first entry that will be all about setup and pre-work. This short post will walk you through all the required hardware and software to start your journey with ESP32 and cloud IoT.

IoT

Homebrew weather station

Today I would like to share with you some small IoT project that I did a few weeks ago. It was a homebrew weather station. Here are in details instruction how I did it. TLDR; RequirementsHardwareESP8266 - I have used dev board with NodeMCU

IoT

IoT Introduction - part 1

Intro Industry 4.0, Internet of Things IoT, Digital Revolution, are common buzzwords that have been striking through multiple press releases, demos, and events for the last 2-5 years. This trend is observable not only in business environment such as global manufacturing companies but

js

New vs Old - The future of programming

JavaScript fatigue is a common topic nowadays. What is worth learning? Do I really need so many tools? What will be the future ? This kind of questions a emerging again and again in medium articles [1],[2] blog posts [3], on conferences [4] and

hackerrank

"Test your might" - Why do I still polish my basics?

It is quite difficult to test a software developer. The difficulty is strongly connected to an amount of time that is required to confirm skills and competences described in resume. This usually involves tedious tests and long discussions about theory and practical experience. In

meetup

Why I started organizing programming meet-up

Recently I have read a great blog post about attending programming meetups - Why I Stopped Attending Programming Meet-ups. This triggered me to share my own thoughts on this topic. Source http://www.funnyjunk.com/funny_pictures/2765055/The/ It is true that quite

mongo

JavaScript by example - Text data mining

From time to time, we all face the same problem - data analysis. How to find useful information in a shapeless mass of data. This is quite a typical problem, when we face retrofit from spreadsheet-like data storage. Source: https://www.solidswiki.com/index.

shard

Mongo DB - Shards segmented by location

In this post we use our previously created shard and start to segment our data by location. This is quite a common scenario. The idea is to split data by one of the properties. This will give us some insight into how sharding can

mongodb

Mongo DB Sharding - docker example

There are multiple web entries that touch this, but a comprehensive out-of-the-box setup of MongoDB shard is nowhere to be found. First of all, some of available materials are old and no longer applicable to the latest (4.0.1) MongoDB version.

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