tejashah88

ROS 2 - Calculator

Part 1 - Setting up service definitons

1. Open a new terminal and source the workspace

cd ~/ros2_helloworld_ws
source install/local_setup.bash

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ROS 2 - Hello World Part 2 - Mouse Sensor

1. Open a new terminal and source the workspace

cd ~/ros2_helloworld_ws
source install/local_setup.bash

2. Create a new package

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Part 1 - Preparing the workspace

1. Install needed tools

sudo apt install python3-colcon-common-extensions -y
sudo apt install python3-rosdep2 -y

# !!! NEW Needed Tools !!!
sudo apt install python3-pip
pip install setuptools==58.2.0

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Set locale to UTF-8

sudo apt update && sudo apt install locales -y
sudo locale-gen en_US en_US.UTF-8
sudo update-locale LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8
export LANG=en_US.UTF-8

Update system

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Create a new package

cd ~/ros2_ws/src
ros2 pkg create monitor_station --build-type ament_python --dependencies rclpy
code monitor_station/

Install extra dependencies

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Part 1 - Preparing the project workspace

1. Install needed tools

sudo apt install git -y
sudo apt install python3-colcon-common-extensions -y
sudo apt install python3-rosdep2 -y

2. Create a new directory for your workspace and "change directory" (cd) to it in terminal

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import random

CHOICES = ['R', 'P', 'S']

# Ask user for input (rock, paper, or scissors)
user_input = input('Rock, paper or scissors (type R, P, or S): ')

# Check if user input is valid
if user_input not in CHOICES:
    print('Invalid choice')

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Original setup guide: https://rebrand.ly/ros/install

NOTE: I recommend opening this guide up within the VirtualBox. Here's the short link for easy access: rebrand.ly/ros/quick-install

Fix sudo access

su
adduser <username> sudo
exit

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# Usage: install-python <VERSION>
# Example: install-python 3.6.9
function install_python() {
  VERSION=$1
  sudo apt install gcc make zlib1g-dev
  sudo apt install libssl-dev       # needed for SSL support
  sudo apt install libsqlite3-dev   # needed for SQLite support
  sudo apt-get install libbz2-dev   # needed for BZ2 compression support

  wget "https://www.python.org/ftp/python/$VERSION/Python-$VERSION.tar.xz"

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VERSION=$1
sudo apt install gcc make zlib1g-dev
sudo apt install libssl-dev       # needed for SSL support
sudo apt install libsqlite3-dev   # needed for SQLite support
sudo apt-get install libbz2-dev   # needed for BZ2 compression support

wget "https://www.python.org/ftp/python/$VERSION/Python-$VERSION.tar.xz"
tar xJf "Python-$VERSION.tar.xz"
cd "Python-$VERSION"