Tags: code image send delay bandwidth technology pre class sendWithout assembly, the number of threads is simplified to a direct while loop recv, setsockopt so_sndbuf, So_rcvbuf set to 256*1024, the test result in a short time is 6.7gb/s. But the long test results are as follows: The horizontal axis of the ROS receives the number of event, in 40000 units. (x, Y) indicates that when Ros receives the x*40000
Docker tips and Common commands and docker tipsInstall docker
Check whether the curl package is installed?which curl
If curl is not installed, update the apt source and install curl as follows:apt-get updateapt-get install curlapt-get updatewget -qO- https://get.docker.com/ | sh
Set the current user as the docker u
Understanding about tx rx in ROS
RX: receiveTX: Transfer
1. In INTTERFACE, when we check the traffic of the wan nic, RX indicates the downstream traffic. TX indicates the upstream traffic.When you view the traffic of the LAN Nic, RX indicates the upstream traffic. TX indicates the downstream traffic.Cause,The traffic received by the wan nic, that is, the traffic from the ISP, is the downstream RxWith ROS
, grasp the trend, grasp the future.7. Too Many people think of happiness as the ultimate goal of life. But, if you ' re waiting for happiness to arrive then it's likely that it never will!8. Like sunlight, sunset, we appear, we disappear. We are so important to some and we are just passing through.9. Live without pretending, love without depending, listen without defending, speak without offending.Ten. A life and love would have some thorns and a life without love would have no roses.I have no
Prerequisites: 1, ensure that the reader has installed the Kinect or other deep camera driver, if not installed, can be directly on the network disk download: http://pan.baidu.com/s/1hqHB10w Extract Password: wrmnCreate a map with deep camera-like laser data:Download and install of the dependent packages:1, install Hector_slam2, download hector_slam_example:, after compiling, remember to add this file to the Ros packageROS_PACKAGE_PATH=/home/用户名/catki
If I tried the previous example, is it too troublesome to input commands to the terminal every time the robot moves? Is there a way to control the robot's movement through the keyboard? Answer room of course. I have studied several other robot keyboard-controlled code, but I still have some gains. I finally transplanted it to smartcar, and the experiment was successful.1. Create a control package first. Create a separate package for the keyboard control:
roscreate-pkg smartcar_teleop rospy geome
Document directory
1. Download rovi_base package into your catkin workspace (here is ros_ws)
Posted @ from [FreedomShe]
I 've been playing the WowWee Rovio car for a while. I sorted out the code I wrote earlier. In ROS Groovy, I encapsulated the CGI interface of WowWee Rovio, the main encapsulation is the control interface (three full wheels, camera) and image interface (in order to save traffic, the video stream is not used to obtain the image,
1 preparation work all follow the official operation: http://wiki.ros.org/groovy/Installation/Source
apt-get install python-rosdep python-rosinstall-generator python-wstool build-essentialIf you cannot find the source, go to the prompt page: If you have trouble installing the packages in the command above, make sure you have added the packages.ros.org Debian repository to your apt source lists as described starting here:
Groovy/installation/Ubuntu # yy.2bac8-installation.2bac8-sources. setup
Read Mobile GPs in Ros (Indigo) for robotic positioning ~GPS2BT use in Ubuntu and window systems ~There is no need to purchase additional GPS devices.Mobile phone GPS data transmitted to the computer via Bluetooth, of course, through a similar method can also use the phone's three-axis gyroscope and accelerometer.Android Phone:Install APK:GPS2BT.1.2.3.Ubuntu 14.04 LTS:1. Install the Bluetooth software. BlueZOnce installed, you will be able to pair you
Feel some tools even simple also always forget, right when this is Notepad, Doodle.Linux:Ros:1) Ros View topic of image typesRosrun Image_view Image_view image:=/imagetopic this inside: = actually change the meaning of its built-in topic name2) Ros View topic contentFor example, I have a topic named/ardrone/imu,Rostopic Echo/ardrone/imu3) RQTSometimes it is necessary to display the content of the topic in a
Feel some tools even simple also always forget, right when this is Notepad, graffiti.
Linux:
Ros:
1 Ros View image type of topic
Rosrun Image_view Image_view image:=/imagetopic this: = is actually changing the meaning of its built-in topic name
2 Ros View the contents of the topic
For example, I have a topic named/ardrone/imu,
Rostopic Echo/ardrone/imu
The beginning of the design of Ros robot, from the creation of workspace to compile the running node, because Linux is also a beginner, all kinds of burn, the most basic things first summed up, for future viewing. This is the first time to write a blog, if there are many mistakes in the place, I hope you understand and point out. When writing this article, most of them refer to the following posts:
http://blog.csdn.net/baidu_18189515/article/details/5
Multi-switch switch for topic_tools mux topicHttp://wiki.ros.org/topic_tools/mux
Catalogue1.mux1.mux Usage2.Associated MUX Tools (Mux_select, Mux_add, Mux_delete)2.ROS API1.muxThe MUX node subscribes to a series of input topics and forwards one of the topics to another topic, for example, it is a multi-switch, switching between 1 and N inputs. Provide services such as switching between topics, adding or deleting input topics. At startup, select the fi
Raspberry Pi 3+ros Kinetic version
Remote PC +ros Indigo version
First turn on the Raspberry Pi camera function
sudo raspi-config
Start Camera function
and restart the Raspberry Pi.
Open the Raspberry Pi Official drive node on GitHub
Https://github.com/UbiquityRobotics/raspicam_node
Do the following steps
Enter the source directory of the workspace
$CD ~/CATKIN_WS/SRC
Copy the driver package
$git Clone
In the previous part, " Run the ASPDOTNETCOREMVC program on Docker-part4: Load Balancing ", We have several more complex steps on the Docker platform to achieve the load balance of the website program, configuration steps are more. If the actual site is less, the overall architecture is relatively simple case, this does not have much problem, if the application of more time, will be prone to error. At this
I am very honored to see that my previous blog has helped many ROS learners. In fact, I am also a newbie to ROS. ROS has little information and is difficult to get started. Now I am exploring for more information, I also hope that you can share your learning achievements on the Internet or in the ROS group.
I have seen
Turtlebot has an application panorama to realize iPhone360 panorama photography function. The official use of the Create base and Kinnect, when using the Roomba base and the Xtion Pro live package, found that the tutorial does not start.1. StartRoslaunch turtlebot_bringup minimal.launch \ Load wheel drive Open another Shell windowRosservice Call Turtlebot_panorama/take_pano 0 360.0 30.0 0.3 ordered a camera spinThis time found that Roomba-driven Turtlebot no response at all, the next ste
Compile the package (original blog, reprint please indicate the source-Zhou Xuewei)1. Compile the package:Once you have installed the required system dependencies, we can start compiling the package that we just created.Note: If you install Ros through apt or other package management tools, all dependencies are installed by default.Remember to source your environment configuration (Setup) file beforehand, the operation instructions in Ubuntu are as fo
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