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Questions tagged [wifi]

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

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Network setup for a mobile robot base [closed]

I am working on a mobile robot base that is supposed to be controlled from a stationary control station. The robot itself has multiple processors onboard, which are on an internal Ethernet network. ...
feoranis's user avatar
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0 answers
12 views

Does N:N connection is possible via WiFi DIRECT on Ubuntu?

I am searching for wireless connection method between robots using WIFI DIRECT in Linux. I read many articles and papers, but I couldn't find any example of 1:N and N:N connections in Linux(especially ...
minseoJeong's user avatar
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2 answers
76 views

Best Protocol for Wireless "Instantaneous" Servo Control?

My goal is to have a servo that can be controlled by a mouse "instantaneously", aka as fast as a racing video game cursor or limited by the speed of the servo itself. So far, I have tried ...
Vincent S's user avatar
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0 answers
255 views

Using micro_ros_arduino with ESP32 with wireless ROS system

I am retired and programming has always been a hobby but also my College Degree in Game/Simulations (90%). So I am familiar with a lot of programming as I used it in work for some development/problem ...
Randy Hearn's user avatar
0 votes
1 answer
667 views

Pico W does not connect to my phone's hotspot

I am trying to connect my Pico W to the hotspot that I have. The password and the name of the hotspot are in a file called "secret." I found the code online and when I try to run the code ...
kak_taki's user avatar
0 votes
1 answer
90 views

Hokuyo UST-10LX connected via Ethernet and urg_node

Hello, TL;DR When I don't use urg_node with Hokuyo UST-10LX, I can see ROS2 topics from the robot on the other PC, after using ...
ljaniec's user avatar
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1 answer
77 views

Wifi connection issues with ROS 2 and Humble

I've been having wifi connection issues since upgrade to ROS 2 Humble. The connection will mostly work, but then drop for some period of time. I'm posting this "question" and answer here in ...
user avatar
0 votes
1 answer
5 views

Velodyne has the same IP domain as my WIFI network

Hello, Can I use WiFi and velodyne simultaneously? I thought the answer is yes if two network has different ip domain. Velodyne is 192.168.1.xx, while one of my network is 192.168.3.xx. It works well. ...
user avatar
0 votes
1 answer
474 views

Is it possible to setup a wireless network without internet for the robot and PC?

The system includes three devices: PC, robot's computer, and wireless device. In order to improve the signal quality of the wireless in the whole robot's environment. I'd like to put a big wireless ...
Redhwan's user avatar
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1 answer
46 views

What RF transceivers modules are used on AUVs for communication with ground station?

I am working on a project where we want a RF transceiver on the AUV for communicating with the ground station when its on the water surface. I am looking for RF modules that can work in proximity to ...
Harish's user avatar
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2 answers
54 views

How can I leverage my experience with the JVM and Android to do some hobby-level building and controlling robots at home? [closed]

I'm looking for a product for home hobby-level robotics. Something that has modular robot hardware allowing me to design the robot itself, but lets me write the logic in a JVM or Android language. I ...
Travis Well's user avatar
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1 answer
5 views

Move_group couldn't find controllers loaded on Raspberry Pi in a ROS network

I'm using ubuntu 16.04 on a Huawei Matebook-x, with kernel 4.15.0-91-generic. ROS distro: kinetic and version 1.12.14. Gazebo 7. I have a Niry One robot arm (with Raspberry Pi 3 inside), and wanted to ...
user avatar
1 vote
2 answers
100 views

HTTP requestes for Robot Teleoperation

I'm new to this forum so I apologise if I disrespect some rules. I am considering using HTTP requests to control a robot remotely. The design problem I am trying to solve is that I would like to ...
firetruck123's user avatar
2 votes
1 answer
417 views

How do I download libraries onto the Ubiquity Robotics Raspberry Pi image

I downloaded an sd card image by Ubiquity Robotics which is an Ubuntu OS with ROS preinstalled onto my Raspberry Pi. This image creates a pifi access point for the Raspberry Pi and allows me to ssh ...
Mahir Ahmed-Al's user avatar
0 votes
1 answer
89 views

ESP32 + rosserial_python over WiFi: Lost sync with device

Hi, I am trying to establish rosserial communication between ESP32 (using ESP-IDF and not Arduino framework) and host Ubuntu machine. Here is my implementation: https://github.com/sachin0x18/...
user avatar
0 votes
3 answers
87 views

How to access Raspberry Pi over wifi?

I have to use Raspberry Pi with Arduino on a mobile robot and access Raspberry Pi on a PC through WiFi. Is it possible? Please explain how to do it?
Aether's user avatar
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1 answer
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Exchange data(messages) between robots in ROS1

Hello together, actually I have some rover running on ROS1 and want exchange data over messages between them e.g. to make a merged map. They will all be connected to an access-point. Each rover should ...
user avatar
0 votes
1 answer
5 views

Wifi communication. Alternative for wifi_comm?

I'm trying to establish ad-hoc wifi communication between two Raspberry Pi, both will be running roscore and a full set of applications. I just want to exchange information between them. I found ...
user avatar
0 votes
1 answer
7 views

High latency images messages

Hello everyone, I have a system composed of a robot (android machine using rosjava) and a computer (roscore), both correctly synchronized. The robot publishes rgb-d images over WiFi. The computer ...
user avatar
0 votes
1 answer
94 views

How can robots communicate, locate and identify each other?

I'm planning to build some simple robotic boats. They will be travelling some distance alone but should also be able to group and physically connect together to form one boat. When they are near each ...
kramer65's user avatar
  • 349
0 votes
1 answer
2 views

RGBD-SLAM remote mapping problems

Hi, I am attempting to remotely build a map in real-time with RGBDSLAM over Wifi (if possible). I have Raspberry Pi 3 on my robot with Kinect XBOX 360 from which I am streaming RGB and depth images. ...
user avatar
0 votes
1 answer
7 views

ROS with public Wifi

Hello everyone, I want to use ROS to comunicate Simulink and three drones Crazyflie. I have some problems using ROS with the public wifi of the University, when I type ...
user avatar
0 votes
1 answer
8 views

ROSCORE server on android

Hi, is it possible to run a ROSCORE or a minified version of it on an Android phone? What i want to do is i have a ROS Node A and Android cellphone B without a ROS MASTER (Ubuntu). A and B will be ...
user avatar
0 votes
1 answer
6 views

ROS networking unable to see mesages published by slave computer

I am running Ubuntu 16.04 and ROS Kinetic on both a Beaglebone black(Master) and intel NUC(Slave). My problem is connecting the NUC to the ros master on the beaglebone over wifi. I set the ip address ...
user avatar
0 votes
1 answer
9 views

Transfer video using Wifi

Hey, I am trying to transfer video from one laptop to another for real-time analysis. I followed the instructions given in the following link: http://wiki.ros.org/ROS/Tutorials/MultipleMachines I want ...
user avatar
0 votes
1 answer
9 views

How to to publish sensor data over wifi module(ESP8266-01) through arduino. In my program it created a access point but it is not sending any data

...
user avatar
0 votes
1 answer
46 views

Multiple TCP connections using rosserial_server with WiFi Arduino

Dear all, I am currently running an Arduino Uno* with an ATWINC1500 WiFi breakout from Adafruit and can successfully publish topics over WiFi to a master using ...
user avatar
0 votes
1 answer
136 views

Do Polycarbonates (lexan) block wifi

I am trying to figure out if WiFi from TP-Link N450 Wireless WiFi Router could reliably get through lexan. I need the wifi to be able to have a constant, reliable signal.
NikolaPi's user avatar
0 votes
1 answer
14 views

Rospy and udp sockets

Hi, I want to send data (x,y and yaw values) over UDP to a system that isn't running ROS (a myRIO or any other micro-controller) I am using a code written in in python (ROSpy) by someone in else that ...
user avatar
0 votes
1 answer
3 views

Integrate gmapping and navigation stack with Wi-Fi data

I am using gmapping and navigation stack (just like Turtlebot) to create an autonomous robot. However, I have worked on an additional parameter - Wi-Fi which gives me a unique ID at each point in the ...
user avatar
-1 votes
1 answer
74 views

Could anyone complete my challenge? [closed]

Earlier while writing by hand, I was wondering if anyone could build a pen holder, that could write for me? Maybe you could make some good business from them. Thanks for your time.
Jameson Dennelly's user avatar
0 votes
1 answer
6 views

Connect 2 ros board

Hi, I have 2 arm boards running ros. I need to share the topics between the boards. I want to use a wired connection, is the uart a good choice? (I've got also lan or usb on both boards) Is it ...
user avatar
0 votes
1 answer
1 view

Package to detect interrupted connection?

Hey everybody, I have built the following setup (simplified): Moving base with Pixhawk running APM Rover <-> MavRos (executed on a Pi2, together with the ROS Master) <-> Wifi Link <->...
user avatar
0 votes
3 answers
83 views

Inbound TCP/IP connection failed

I'm getting this warning when launching a .launch file. I have already configured my network and i have also exported master URI on slave. ...
user avatar
0 votes
1 answer
10 views

Connect Arduino with ROS (Ubuntu) via wifi

hello i have previously connected my ROS (Ubuntu) with an arduino uno via bluetooth and publish data from the arduino and view it by using rostopic echo but now i want to do the same thing but by ...
user avatar
0 votes
1 answer
8 views

How can I use the Hokuyo UTM-30LX via wifi?

Hi everybody, I'd like to know if there is a way to use the Hokuyo UTM-30LX via WiFi and, possibly, change the scan rate of the sensor. Thanks in advance! Originally posted by Marty on ROS Answers ...
user avatar
0 votes
1 answer
8 views

RTAB-Map remote mapping issue , unable to get data fast enough over WiFi

Hi guys, I am having issues using RTAB-Map on the client side(base station/my laptop). I have a Kinect on my robot and the machine it is connected is set as the Master.I have no problem accessing the ...
user avatar
4 votes
1 answer
210 views

Wifi module for Zumo robot

I'm a CS student trying to implement a clustering algorithm that would work for a set of robots in an indoor controlled environment. I'm still starting on Robotics and don't have much experiencing in ...
dev_nut's user avatar
  • 141
0 votes
2 answers
8 views

ROS dies when wifi disconnects temporarily

I'm using ROS across two machines: robot and workstation When the wifi on the robot disconnects (might happen when switching AP's), the ros processes die. I tried using 127.0.0.1 for ROS_MASTER and ...
user avatar
0 votes
1 answer
6 views

what are the different communication methods available?

Im not talking about services etc. I mean what communication methods could be used between a laptop running ROS and a robot running ROS? i mean the actual data transfer medium..wifi? Zigbee? bluetooth?...
user avatar
0 votes
1 answer
1 view

Using wiifi_ddwrt Package

Hi, I'm trying to work with the wifi_ddwrt Package on indigo. But, Im having trouble. First I installed the Package by giving the Source in the terminal: git clone https://github.com/ros-drivers/...
user avatar
0 votes
1 answer
8 views

/etc/network/interfaces configuration for urg node

Hi guys. I got problem with the network when im using urg_node for Hokuyo Laser Scan. After running roscore, I start up urg_node with: ...
user avatar
0 votes
1 answer
4 views

Connect ROSARIA to pionner robot using wifi

Hi, I have a P3DX robot with an onboard pc running Windows. I want to move it using a remote laptop running Linux with ROS and ROSARIA installed. The problem is that ROSARIA uses Serial port to ...
user avatar
1 vote
2 answers
170 views

What wireless technology to use to control robots in classroom?

I want to build a cheap robot programmable in Scratch graphical language, that could be employed during lessons in school. Scratch code is interpreted on a PC, so on the robot there should be only the ...
mactro's user avatar
  • 953
0 votes
1 answer
4 views

how do I improve the steam video speed in ROS

Hello, thank you for spending your time try to help my problem. Now I have two computers and would like to show the steam video on both computers through wifi connection. the package Im using is ...
user avatar
0 votes
1 answer
284 views

Is our laptop wifi single channel or multiple channel? This is for controlling a bot

We are building a hobby drone(Quad-coptor) with a camera for footage. So to control the quad, i have been suggested(Web,Here) to use minimum of four channels.For power and for turning etc., So which ...
vrOom's user avatar
  • 3
2 votes
1 answer
197 views

Choosing a WiFi antenna for outdoor robot

A time has come for my robot to get some more permanent computer than my laptop balanced on top of it. I have selected a mini itx board that can be powered directly from battery and some components ...
cube's user avatar
  • 729
0 votes
2 answers
2 views

How to transmit images from a camera?

Hi, I intend to public images from a wifi camera on a topic, i tried to use usb_cam but I think it does not support wifi, so i tried to download the gscam package but it is not available for indigo, ...
user avatar
0 votes
1 answer
7 views

How do I capture images from a wifi camera?

Hi, i am new at this so I need your help, I need to capture images from a wifi camera( this in particular SJ4000 WIFI). I had thought of doing it using the usb_cam and changing the /dev/video0 for the ...
user avatar
2 votes
1 answer
451 views

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