🐕 Go1 ROS2 Driver

A ROS2 package which can be used to control the legged robot Unitree Go1 Edu using ROS topics.

This package acts has middleware between ROS2 and unitree_legged_sdk, which enables anyone to control the robot with velocity commands as well as receive back the robot state. Furthermore, additional features are also available such as standing up/down the robot and use head LEDs for some status information.

[!NOTE] Only supports unitree_legged_sdk High level commands

📜 Table of Contents

• ✅ ROS Distro Build Status
• ⚙️ Installation
  • 📦 Installation From Source
• 🚀 Usage
• 🤖 ROS Related
  • 📥 Subscribed Topics
  • 📤 Published Topics
  • ⚙️ ROS Parameters
• 🛠️ Features
  • 💡 Robot LED statuses
  • 🪫 Low Battery Protection
  • 🚧 Obstacle Avoidance
• 🔗 Related Packages
• 🔑 License
• 👏 Contributions
• 🎖️ Credits
  • Maintainers
  • Third-party Assets

✅ ROS Distro Build Status

ROS Distro	Status
Iron
Humble
Foxy

⚙️ Installation

This package is available in the ROS index for both Iron and Humble distributions.

sudo apt install ros-[distro]-unitree-ros

[!IMPORTANT] If you are using foxy as your ROS distribution, you need to build from source

📦 Installation From Source

[!NOTE] Make sure to clone it recursively, as depends on the unitree_legged_sdk.

mkdir -p ~/unitree_ws/src
cd ~/unitree_ws/src
git clone --recurse-submodules https://github.com/snt-arg/unitree_ros.git

Once you have cloned this repository, you will need to build it using Colcon.

cd ~/unitree_ws
source /opt/ros/[ros-distro]/setup.bash # or zsh if using the zsh shell!
colcon build --symlink-install
source install/setup.bash # or zsh if using the zsh shell!

After having built the workspace, you should now be able to use the driver to control your robot.

🚀 Usage

Before using the driver, you will need to make a decision whether you want to control the robot using a Wi-Fi connection or a wired connection. In case you go for a wired connection, you won't need to do anything. In case you want to use the Wi-Fi connection, there are 2 options:

1. You can simply launch the driver and passing the robot_ip argument:

source ~/unitree_ws/install/setup.bash # or zsh if using the zsh shell!
ros2 launch unitree_ros unitree_driver_launch.py robot_ip:="192.168.12.1"

1. A configuration file is also available under config/params.yaml. You can change the robot_ip there too:

source ~/unitree_ws/install/setup.bash # or zsh if using the zsh shell!
ros2 launch unitree_ros unitree_driver_launch.py params_file:="path_to_your_params_file"

[!NOTE] In case, you want to change some of the other parameters available, such as the topic names, then you need to use the config/params.yaml file for that.

🤖 ROS Related

📥 Subscribed Topics

📤 Published Topics

🔧 ROS Parameters

🛠️ Features

[!NOTE] In the next version, joint states will also be available.

💡 Robot LED statuses

The robot has a few predetermined LED statuses, which are useful to give some information to anyone using the robot. The following statuses are available:

• 🟢 Green Light: Ready status

  

• ⚪️ White Light: Idle status

  

• 🔵 Blue Light: Moving status

  

• 🟡 Yellow Light: Low battery (< 30 %)

  

🪫 Low Battery Protection

By specifying a low battery threshold using the parameters file (low_batt_shutdown_threshold), the driver will stop the robot from moving and will stand it down. By default, the low battery threshold value is set to 20%.

🚧 Obstacle Avoidance

The robot has an obstacle avoidance mode. However, this mode is not enabled by default. Therefore, this driver allows you to enable it using the parameters file (use_obstacle_avoidance). By default, this is set to false

🔗 Related Packages

• unitree_ros_to_real

🔑 License

This project is licensed under the GPL-3.0 license - see the LICENSE for more details.

👏 Contributions

Contributions are welcome! If you have any suggestions, bug reports, or feature requests, please create a new issue or pull request.

🎖️ Credits

This package was developed for the Autonomous Robotics Group (ARG) from the University of Luxembourg.

Maintainers

• Pedro Soares

Third-party Assets

• unitree_legged_sdk: This is the SDK provided by the Unitree robotics. It is being used to send/receive all the High level commands to/from the robot.

• faceLightSDK_nano: This is the SDK that can be found on the internal computers of the Unitree Go1. It has been ported to this ROS package with the goal of being able to control the face LEDs, which are used to give some robot statuses.