HemaZ

Installing ROS Noetic on Raspberry Pi 4

Hello Everyone. I've been trying to install ROS Noetic on Raspbian GNU/Linux 10 (buster) from source but it was like a nightmare. Finally, I was able to install it and I want to share it with you.

Steps:

$ sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'

adujardin

# https://elinux.org/Jetson/FAQ/BSP/RootFS_Reduction#Remove_installed_deb_packages

## Step 1, safe
sudo apt update
sudo apt autoremove -y
sudo apt clean
sudo apt remove thunderbird libreoffice-* -y

## Step 2, still safe but not recommended for dev use
# samples

wannadrunk

deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
deb http://archive.raspberrypi.org/debian/ buster main

# Uncomment line below then 'apt-get update' to enable 'apt-get source'
#deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi

matthiasroos

Installing Python 3.7.6 on Raspbian Stretch

As of January 2020, Raspbian Stretch does not yet include any Python release newer than Python 3.5.x. This means we will have to build it ourselves, and here is how to do it.

1. Install the required build-tools (some might already be installed on your system).

aallan

#!/usr/bin/env python3

import platform
PLATFORM = platform.system().lower()
GOOGLE = 'edge_tpu'
INTEL = 'ncs2'
NVIDIA = 'jetson_nano'
PI = 'raspberry_pi'
MAC = 'darwin'
IS_LINUX = (PLATFORM == 'linux')

HadrienG2

Hello, Rust community!

My name is Hadrien and I am a software performance engineer in a particle physics lab. My daily job is to figure out ways to make scientific software use hardware more efficiently without sacrificing its correctness, primarily by adapting old-ish codebases to the changes that occured in the software and computing landscape since the days where they were designed:

• CPU clock rates and instruction-level parallelism stopped going up, so optimizing code is now more important.
• Multi-core CPUs went from an exotic niche to a cheap commodity, so parallelism is not optional anymore.
• Core counts grow faster than RAM prices go down, so multi-processing is not enough anymore.
• SIMD vectors become wider and wider, so vectorization is not a gimmick anymore.

gyassine

Tutoriel pour l'installation de MQTT sur Rpi et connexion avec un Arduino en Wifi

(Note : ces informations ont été compilées à partir de différentes sources anglaises/françaises)

• Tutoriel pour l'installation de MQTT sur Rpi et connexion avec un Arduino en Wifi
  • Les technologies
    • Request/Response
      • CoAP (Constrained Application Protocol)
• REST/HTTP

Tiryoh

sudo apt-get update
sudo apt-get install -y build-essential gdebi
mkdir -p ~/tmp
wget https://github.com/nomumu/Kinetic4RPiZero/releases/download/v_2017-10-15/rpi-zerow-kinetic_1.0.0-1_armhf.zip
unzip rpi-zerow-kinetic_1.0.0-1_armhf.zip
sudo gdebi rpi-zerow-kinetic_1.0.0-1_armhf.deb
sudo /opt/ros/kinetic/initialize.sh

heroheman

Ranger Cheatsheet

General

Shortcut	Description
ranger	Start Ranger
Q	Quit Ranger
R	Reload current directory
?	Ranger Manpages / Shortcuts

ashish2199

To create a Table

	create table risk_clos_rank(
		id_num int IDENTITY(1,1) NOT NULL,
	    username nvarchar(100),
	    datetime_of_decision DATETIME
	);
	
	CREATE TABLE TheNameOfYourTable (
 ID INT NOT NULL IDENTITY(1,1),