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Questions tagged [wifi]

Questions about robots communicating over Wi-Fi (802.11).

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2 votes
1 answer
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How can I improve the range of an XBee S6B?

Has anyone used the XBee WiFI modules? Done a range check on them? With my laptop i get a range of around 400m on industrial level Accesspoints on a football field, well how good are these devices ? ...
user2967920's user avatar
0 votes
1 answer
133 views

which ports are needed for ROS?

Hello, I need to run ROS in a host wifi network and I do not have full control over it. I saw there is a firewall that prevents connections between clients to port 11311, that seems to me to be the ...
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0 votes
1 answer
3 views

publish up wifi

i can't puplish mesage up wifi .. can you help me ? sorry I don't speak English well. thank you Originally posted by turtle on ROS Answers with karma: 17 on 2014-09-09 Post score: 0 Original ...
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1 answer
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Further Optimization suggestion for wireless openni streaming

Let me first describe the system that I've came up with.. I have two Odroid-U3 with Asus Xtion Pro Live and Wifi. Both of them run the ...
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0 votes
1 answer
14 views

Why am I getting worse performance with UDPROS than TCPROS?

I am doing an experiment that consists on transferring JPG compressed stereo pairs from one node to another at 5Hz. I am measuring the message transfer time using two technologies: UDPROS and TCPROS. ...
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0 votes
1 answer
9 views

Wi-fi localisation using AMCL

We are working on a project whereby we are attempting to localize the robot within the map using the received wi-fi signal strength ID (RSSID). We have had a look through the amcl_node.cpp file and ...
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2 votes
2 answers
229 views

How to use scan command in Arduino WifiBee

We want to find available WiFi networks near. So in tutorial there is command scan, which is send from CoolTerm program from PC. Now we want to write program to Arduino which will do same operation, ...
ardakshalkar's user avatar
1 vote
0 answers
459 views

Connecting Wifi bee with Xbee USB adapter

I started to follow "Get started with the Wifi Bee" tutorial in Wifi bee v1.0 wiki page. I am using Xbee USB adapter v2.0,Wifi Bee-RN-XV,mini USB cable as listed in Tools needed. When i conneted the ...
Zerde's user avatar
  • 11
4 votes
3 answers
2k views

2D path following robot, converting XY axis path to input on wheels

at the moment I am creating an android program, that will steer my simple, 3 wheel (2 motors, 1 for balance) robot to move online following the path drawn by user on his screen. The robot is operated ...
Sullson's user avatar
  • 43
1 vote
1 answer
1k views

How to choose WiFi signal strength detecting sensors

We want to create robot that will localize itself by the signals of wifi routers. Which sensors should we buy to detect strength of 3 WiFi signal? Which of following is necessary for us? http://www....
ardakshalkar's user avatar
5 votes
2 answers
2k views

Wifi to pass through aluminium

I am about to make an rc car which uses a wifi connection. The body for the car would be made from aluminium and the wifi receiver will be placed inside this aluminium casing. How do I make sure ...
user1989's user avatar
  • 111
0 votes
1 answer
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Stage Wifi Model

Hi, it the stage wifi model [http://playerstage.sourceforge.net/doc/stage-cvs/group__model__wifi.html] available in the stageros node ? I always get ...
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0 votes
1 answer
4k views

Build an WiFi IP camera with webcam [closed]

I have a USB webcam and a WiFi module which it can convert Serial data to WiFi and vice versa. The question is can I simply convert the data coming from the webcam to serial with a USB to Serial IC (...
Mehrdad Kamelzadeh's user avatar
1 vote
0 answers
357 views

How to make a motion sensor circuit, that can communicate with my LAN? [closed]

I'm a newbie to Electronics/ Robotics, but I love to do it as a hobby. So I want to build a circuit (a really small in size would be much better) with a motion sensor that can communicate data (...
Thanu's user avatar
  • 111
0 votes
1 answer
15 views

multiple turtlebots on wireless network

I have 10 turtlebots (version 1, the white one) that I'm trying to operate on a wifi network (g wireless standard). Any three of them together work fine but as soon as I add a fourth the ...
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0 votes
3 answers
1 view

Problem using the provided groovy RPi Image

Hi Everyone! So I was going for a quick test using the image provided here: ros.org/wiki/groovy/Installation/Raspbian/Source (sorry, I'm new here and not allowed to post Hyperlinks). After I flashed ...
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4 votes
1 answer
662 views

Wifly Shield Not Connecting

I recently asked a question about the juniper WiFi shield, and am now working with wifly from spark fun. I've been using an updated version of their experimental library, and have been attempting to ...
Dylan Katz's user avatar
0 votes
2 answers
2 views

Teleop based control of a custom vehicle

I am making a ground vehicle which can be controlled over wifi signals using a keyboard. So rather than worrying about all the custom interfaces that i would have to create, i though of modifying the ...
user avatar
0 votes
1 answer
167 views

Where can I find a tutorial or sample code for the Juniper WiFi Arduino Shield?

I recently got an arduino wifi shield known as "juniper" (I believe it was by cutedigi). I've tried to find code examples, but when I saw code, it was un-commented and very little explained, I could ...
Dylan Katz's user avatar
0 votes
1 answer
1 view

hokuyo node bandwitdh

Hi all. I wish to have some comments from Hokuyo users. I intend to have 5 bots, each with a laser, sharing data over an 802.11g link. I think the laser should sample at 10Hz at least. Since data ...
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32 votes
14 answers
17k views

Can ROS run on a Raspberry Pi?

Can ROS run on a Raspberry Pi? ROS is resigned to run on a network of machines, with different machines, even different cores on the same machine doing different jobs. Can one of those machines be a ...
Rocketmagnet's user avatar
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0 votes
1 answer
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Is VPN necessary for networking turtlebot?

Hi , I was testing my system for installing the turtlebot setup. I was wondering if VPN is anecessary step in the networking setup? Can the two pc's communicate only via wifi ? I did not understand ...
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0 votes
1 answer
7 views

How to use ROS to control mobile Lego Mindstorms robots? (was: ROS on Lego NXT over Wifi)

Hi, has anybody successfully connected to a NXT using ROS (e.g. nxt_lejos or nxt_ros) over remotely? Which hardware did you use? How much effort did you put into making it work? Best regards, Andreas ...
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0 votes
1 answer
7 views

subscribe to image topic over WiFi

Hi guys, I have an Asctec Pelican here with a Ueye camera attached to it. We're trying to set it up such that we can subscribe to the topic from a remote PC, and view the video feed in real time. We ...
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0 votes
1 answer
2 views

Wifi signal strength monitoring in ROS fuerte?

Hi all, Does anyone know if Fuerte actually integrated wireless signal strength support? I personally would like to monitor strengths of various wireless signals and based on that do planning like ...
user avatar
0 votes
1 answer
2 views

rosjava wifi scanning

hello.. i have a question.. how can i make the project that wifi-scanning in rosjava ? i search the API in http://docs.rosjava.googlecode.com/hg/rosjava_core/html/javadoc/index.html but i cannot find ...
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0 votes
1 answer
1 view

ROS fuerte wifi support?

Where can I find info about what is actually implemented in ROS fuerte from this list: http://www.ros.org/wiki/fuerte/Planning/IPC/WiFiNeeds Especially a network-monitor would be interesting for me (I'...
user avatar
0 votes
1 answer
2 views

rospy publisher hanging when subscriber drops connection because of wifi - is this normal?

I have a visualizer running on a laptop via a wifi connection subscribing to GPS messages. When the wifi is dropped the gps publisher hangs (preventing vehicle control through other subscribers). ...
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0 votes
1 answer
14 views

How to read wifi signal strength using ROS

HI all, I am a new user Of ROS I want to read wifi signal strength using ROS . I wana ask that -is there any package to read signal strength? -is some one one has done this before thaen plaese guide ...
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0 votes
2 answers
23 views

TF on multiple robots gets crowded

I have been running experiments with a team of four KUKA youBots communicating via ROS over WiFi. I have observed that the /tf topic is crowded with a lot of transforms not of interest to most of the ...
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0 votes
1 answer
1 view

Can we add wifi signal to turtlebot_dashboard

I would like to monitor the wifi signal from the asus 1215n laptop on my turtlebot from the dashboard node. Is anyone else interested in this option. If no one is willing to work on it, where should I ...
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0 votes
2 answers
4 views

Android and ROS Communication over USB instead of Wifi

I'm interested in running Android devices as IMUs, GPS sources, or even complete Odometry sources. I once implemented this for IMUs a long time ago over the wifi, but there was some considerable ...
user avatar
0 votes
3 answers
4 views

Do you have any advice for sending PointCloud2 over a wireless nework

I am trying to send the PointCloud2 topic through a wireless network. Is there already some implementation in ros I am missing? Any good link you would recommend? Originally posted by MlabKinect on ...
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