Sep 30Member-onlyInterfacing 2.4" SSD1309 SPI OLED Display With ESP8266In this tutorial, we’ll learn how to connect 2.42" SSD13093 SPI OLED display with ESP8266. As a development board, we’ll use ESP8266 NodeMCU board. SPI Pins in ESP8266 NodeMCU Board ESP provides two SPI ports. However, the ones on the left side (SD1, CMD, SD0, CLK) cannot be used as it’s reserved for flash communication. So…Esp82662 min readEsp82662 min read
Sep 10Member-onlyConfiguring ESP8266 Wi-Fi Network Connection Through A Web PageESP8266 is one of the popular Wi-Fi chips with microcontroller capability. …Esp82668 min readEsp82668 min read
Jul 25Member-onlyMost Common 6 JSON Deserialization Needs And Solutions With JacksonAs a developer, daily bases, we struggle typical use cases when working with JSON, no matter what programming language or technologies we use. Transform a json to a mutable or an immutable object, mapping a field with a specific naming strategy to another, … etc. Today, we are going to…Java6 min readJava6 min read
Jul 18Member-onlyIf the PORT Menu Is Disabled On Arduino IDENot sure if it’s valid for other Linux distributions, but if you’re an Ubuntu 22.04 user, not able to access your board and the PORT menu is disabled, follow the steps below:Arduino2 min readArduino2 min read
Mar 25Member-onlyDependency Injection Scopes In NestJSNestJS is one of the best server-side framework alternatives with the features it presents. Today we’re going to mention some secret power of the IoC container that comes out of the box with NestJS. Normally, the framework manages providers` lifetime as singleton. In other words, having stateful objects in the…Nestjs2 min readNestjs2 min read
Oct 24, 2022Member-onlyAre You Sure That You’re Making A Profit?Nowadays, most of us are suffering from higher inflation (some of us even more ) and, trying to protect our money from inflation with different strategies. Some people buy commodities, others invest in various stock markets, cryptos, forex… etc. And.. Of course, some of those assets lose or increase their…Excel6 min readExcel6 min read
Aug 20, 2022Member-onlyDoesn’t PHP-FPM Docker Image Care About Your Configuration Changes?Problem: I need to change the port configuration of www pool to TCP/8090. Although I modified and overridden www.conffile while building the image, php-fpm still starts with another configuration.Docker2 min readDocker2 min read
May 23, 2022Member-onlyBeautify Git DiffsThough Git colorizes the diff outputs, it’s still not easy to recognize exactly what’s changed in a line. Please have a look at the following screenshot: Though there are only a few characters of changes, it appears like the whole line is removed and added in a different shape. Anyways…Git2 min readGit2 min read
Apr 10, 2022Member-onlyMaking Assertions On A Stub For Consecutive CallsWhen you need to write some unit tests for a piece of code like the following one, you need to make sure that the dependencies are called expectedly on each call in case of repetitive calls like recursion. As you can see in the example code above, the method…Nodejs2 min readNodejs2 min read
Apr 2, 2022Member-onlyConfiguring Test Suite Separately By The Test ScopesDifferent test copes may require different configurations. For example, unit tests can finish in a short time frame as all the dependencies are mocked, however, end-to-end tests may need a higher timeout value if the application needs to communicate external services. In this article, we’ll see how to create a…JavaScript2 min readJavaScript2 min read
