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How to install and configure Redis on Ubuntu

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Redis is an open-source in-memory key-value data store. It can be used as a database, cache, message broker and supports various data structures such as Strings, Hashes, Lists, Sets, etc... Apart from its performance and flexibility, Redis stands out with its wide language support, high availability, and automatic partitioning.

Your first Docker Hub image from scratch

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Docker provides the ability to package and run an application in a loosely isolated environment called a container. The isolation and security allow you to run many containers simultaneously on a given host. Containers are lightweight and contain everything needed to run the application, so you do not need to rely on what is currently installed on the host. You can easily share containers while you work, and be sure that everyone you share with gets the same container that works in the same way.

How to setup Nginx server blocks (virtual hosts)

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Nginx logically divides the configurations in order to serve different content into blocks. A server block is a subset of Nginx’s configuration that defines a virtual server used to handle requests of a defined type. Administrators often configure multiple server blocks and decide which block should handle which connection based on the requested domain name, port and IP address.

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Installing Docker Engine and Docker Compose

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Docker is a service that use OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. Because all of the containers share the services of a single operating system kernel, they use fewer resources than virtual machines.

Allow remote access to MySQL server

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Many applications start their web server and database hosted on the same machine. It's simpler, cheaper and easier to manage. However, as our application grows , a setup like this can bring security issues and scalability problems. A common solution is to separate our database from the application: creating a dedicated database server and allowing applications to connect remotely. This setup is more secure, it can provide you a better analysis of the bottlenecks and definitely makes the scalability easier.

How to install MySQL 8.0 server on Ubuntu

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MySQL is an open-source relational database management system (RDBMS). Its name is a combination of My and SQL the abbreviation for Structured Query Language. A relational database organizes data into one or more data tables in which data types may be related to each other; these relations help structure the data. SQL is a language programmers use to create, modify and extract data from the relational database, as well as control user access to the database.

How to install PHP-FPM on Ubuntu

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By default Nginx is not capable of processing dynamic web pages with PHP so it requires the use of specific additional plugins for this purpose. One of these plugins is FPM (FastCGI Process Manager). FPM is an alternative PHP FastCGI implementation with some additional features (mostly) useful for heavy-loaded sites. It is the preferred method of processing PHP pages with Nginx and is faster than traditional CGI based methods.

Install and configure Nginx on Ubuntu

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Nginx is open source software for web serving, reverse proxying, caching, load balancing, media streaming, and more. It started out as a web server designed for maximum performance and stability. In addition to its HTTP server capabilities, Nginx can also function as a proxy server for email (IMAP, POP3, and SMTP) and a reverse proxy and load balancer for HTTP, TCP, and UDP servers.

Connecting to remote server using SSH

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Secure Shell (SSH) is a protocol that provides secure command-line access to a remote server. By using SSH, you can remotely log in and run commands as if you were sitting right at the server.

The benefit of using SSH over other methods of remote access is that, as the name suggests, communications are securely encrypted, protecting the traffic flowing to and from the server. Data is encrypted at both ends of the client/server connection using a digital security certificate and access credentials are also protected.



Playing popular songs with Arduino and a buzzer

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HiBit

Dr. Dre ft Snoop Dogg - Still D.R.E. has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

It's not possible to make a direct MP3 to buzzer decoder because a buzzer (especially a typical piezo buzzer) can only produce simple tones at specific frequencies, not complex audio like speech or music. MP3 files contain compressed, multi-frequency audio data far beyond what a buzzer can reproduce. At best, you could extract a basic melody or rhythm if the MP3 is extremely simple (like single-tone music), but decoding full MP3 audio into something a buzzer can play accurately isn't feasible.

Playing popular songs with Arduino and a buzzer

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HiBit

Jujutsu Kaisen - Specialz has been added.

Enjoy!

Complementary filter and relative orientation with MPU6050

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HiBit

Thank you, very appreciated!

The issue is likely that the MPU6050 isn't properly initialized after power-up. Make sure the setup() function runs completely each time the device is powered on, and consider adding a small delay before using the sensor.

Playing popular songs with Arduino and a buzzer

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HiBit

Yung Kai - Blue has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

First day out has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Vanilla Ice - Ice ice baby has been added.

Enjoy!

Getting real-time position using MPU9250

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HiBit

We used an existing library for this. You can see how it was implemented in the code snippet above.

It is also accessible in our GitHub repository.

Reading MPU9250 sensors with Arduino

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HiBit

The article Getting Real-Time Position Using MPU9250 explains how to calculate real-time position using sensor data.

Complementary filter and relative orientation with MPU9250

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HiBit

You can learn how we calculate pitch and roll using a complementary filter in this project; the file is available on GitHub.

Playing popular songs with Arduino and a buzzer

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HiBit

Assassin's Creed 2 - Ezio's Family has been added!

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Livin' on a prayer has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Crystal Castles Kerosene has been added.

Enjoy!

How to use the NRF24L01 module with Arduino

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HiBit

The D10 pin has a specific function; it must be set as an output for the Arduino to operate as the master in an SPI communication protocol. In the provided wiring and code, the pin is already functioning as an output.

How to use the NRF24L01 module with Arduino

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HiBit

I suggest verifying the wiring to confirm that all components are correctly connected, followed by re-uploading the code. The examples provided in the post have been tested and are operational. Please consider that there might be a physical problem, such as a damaged or defective module.

Playing popular songs with Arduino and a buzzer

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HiBit

Coldplay - Hymn for the weekend has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

Was wollen wir trinken has been added.

Enjoy!

Playing popular songs with Arduino and a buzzer

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HiBit

The board has built-in memory. If additional memory is needed, an alternative board can be used.

Playing popular songs with Arduino and a buzzer

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HiBit

The Doom melody requires more memory than others, so make sure your board can handle that amount. If not, you will usually encounter an error during compilation.

As a workaround, you can try removing some of the notes (along with their respective durations) to fit the melody on the board.

Playing popular songs with Arduino and a buzzer

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HiBit

We couldn't find notes for that song that will sound good with a buzzer.


HiBit community member since December 2020