Manipulating audio files using Python and Linux
In this post we are going to manipulate some wav files using Python. We would like to add some noise or sound to a recorded wav file. Record your voice Let's record a sound
Hotword spotting with SnowBoy Kitt.ai Part I
Snowboy is a hotword detection engine from Kitt ai. They have prepared a easy to use vocal command recogniton that can be used straight in you project. If you have a company or a start
Linux Utilities and Commands 1.20 – [Quick]
Updated on Nov 2017! Here we are again! I hope that you will appreciate this new set of linux commands Linux Utility 1.21: Group members In the previous batch of linux commands we
Handling ontologies with ROS
Updated on February 2017! This is a step by step guide related to the Github repository JinchiMiru. We will setup a RosJAVA environment in order to use the Ontology API of JENA. Prerequisites: Working
Ros – Laserscanner with Kinect
roscore roslaunch openni_launch openni.launch rosrun rviz rviz Set the RViz options for Fixed Frame (at the top of the Displays panel under Global Options) to camera_link. On the left-hand side of the RViz panel, click
Image – Compress and resize with terminal in Ubuntu
Updated on August 2017! We are going to see a quick list of usefull commands to edit images with the terminal. Compress by size First install jpegoptim with: userk@dopamine:~$ sudo apt-get install jpegoptim
[ Xenomai Experimental Result ] Dual kernel approach for a Real Time System with Raspberry Pi Model B
Updated on Jan 2017! In this post we will see the results of the implementation of a Real Time system on a Raspberry Pi using Xenomai and linux kernel. Real-time systems are computing systems
Bluetooth multiple serial connections with Linux
In a previous post about bluetooth we have seen how to connect to a low cost HC-06 or Sparkfun Mate Gold module connected to an Arduino and establish a serial communication with it using minicom.
Bash Script – Prepare .arff files for Weka from csv
In this quick post we will prepare a few CSV files containing data for Training and Test sets in order load them in Weka and train a classifier. Prerequisites To install Weka, use this link
Linux Utility And Commands 1.10
Append a string to the last created file using shell scipts Let's suppose we would like to append ',yes' to the last csv file that has been created. The content of the folder is
[ 0 ] Raspbian Instructions: Install Jessie Lite on Raspberry Pi 3
Updated on Oct 2017!! Hi guys! Let's download the latest Raspbian Jessie Lite from the official RaspberryPi website. userk@dopamine:~$ cd Downloads userk@dopamine:~/Downloads$ wget https://downloads.raspberrypi.org/raspbian_lite_latest --2016-06-14 01:09:06-- https://downloads.raspberrypi.org/raspbian_lite_latest Resolving downloads.raspberrypi.org (downloads.raspberrypi.org)... Saving to: ‘raspbian_lite_latest’
[ 0 ] Ubuntu instructions: Install Ubuntu Mate on Raspberry Pi 3
We will download the image from the official website of Ubuntu Mate userk@dopamine:~/Downloads$ wget http://fra.ubuntu-mate.net/raspberry-pi/ubuntu-mate-16.04-desktop-armhf-raspberry-pi.img.xz Ok, once the download has finished, get an uSD card with at least 8Gb of storage capacity and Class 10
Linux Utilities and Commands 1.00 – [Quick]
Updated on Noc 2017! We will use this post to share all the useful linux commands used in other entries. Managing linux user and group accounts The system administrator has many responsibilities including configuring
ROS on a Raspberry Pi 2 – [Quick]
In this post we will install ROS Indigo on a Raspberry Pi 2, it is just a sequence of commands you should use to install this framework. Please refer to the official main page for
Ros Indigo installation in a Chroot – Ubuntu 15.10
In this post you will find the steps required to install Ros in Ubuntu 15.10. Please refer to the official page, if the installation fails for some reasons come back here. The first steps of
Bluetooth with Linux – Send and Receive data
Bluetooth Post Updated on Feb 2017! We have already used a bluetooth module with an Arduino in Using Blueetooth Mate Gold in your Arduino project. In this post we would like to open a serial
wireless network with Raspberry Pi – [Quick]
Updated on January 2016! In this post we will see how to connect the Raspberry Pi board to a wireless network through the Edimax WiFi adapter. You can easily find this dongle on Amazon
Keyboard configuration using Linux
When you install a fresh linux distribution the default keyboard layout is set to En-en. If you need to reconfigure you keyboard settings then follow these steps. Minimal Linux distribution? Stop wasting your time
Real time system with Raspberry Pi
Have you ever heard about real time systems? Real-time systems are computing systems that must react within precise time constraints to events in the environment. Rather than being fast, a real time computing system should
WordPress on Ubuntu or Raspbian
UPDATED on JUNE 2018! In this post we will install the well known Wordpress on a linux machine. Worpress is the most popular Content Management System that allows you to create a flexible website