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

asked 2021-03-01 20:47:04 -0600

Redhwan gravatar image

updated 2021-03-01 20:53:03 -0600

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 device in the middle corridor where it is not Ethernet (no internet) and only feed by power, then use its signal to connects it with the robot's computer. The robot's computer has a small wireless device that will connect with a big wireless device. Both wireless devices have no internet, only electric power, and signal.

Can I transmit data from the robot to my PC and vice versa over Wi-Fi's signal ?

Can I access the robot's computer using Wi-Fi's signal to launch the robot ?

If yes, please your suggestions, and what are its disadvantages?

Any suggestions would be greatly appreciated.

Note: the system is working fine now using the internet in the big wireless device and connect it with the robot's computer and PC, only some problem when the robot is very far from a big wireless device because of dropping the signal quality to 5% here.

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Closed for the following reason question is off-topic or not relevant. Please see http://wiki.ros.org/Support for more details. by gvdhoorn
close date 2021-03-02 02:30:08.371932

Comments

1

use "access point" not "router" and give static ip adresses for all devices or use "hostname"

omeranar1 gravatar image omeranar1  ( 2021-03-01 23:26:18 -0600 )edit

did you mean those lines in bachrc file????

#export ROS_HOSTNAME=ip for master
#export ROS_IP=ip for master
#export  ROS_MASTER_URI=http://ip for slave:11311
Redhwan gravatar image Redhwan  ( 2021-03-01 23:40:31 -0600 )edit

when you connect all devices to the access point then if all devices are in the same pool (192.168.9.x), if you can use "ping 192.168.9.x" for all devices, it means all devices are linked together.

now you can use; 

export ROS_HOSTNAME=ip for master<br>
export ROS_IP=ip for master<br>
export ROS_MASTER_URI=http://ip for slave:11311<br>
omeranar1 gravatar image omeranar1  ( 2021-03-02 00:07:08 -0600 )edit

I'm sorry, but this does not seem like it's a ROS question.

It's more about hw setup for wireless networks.

I'd suggest you post it on a more appropriate forum instead.

gvdhoorn gravatar image gvdhoorn  ( 2021-03-02 02:30:50 -0600 )edit

I think, this question is a ROS question. Please, see here omeranar1's answer is solved my issue. Those lines in bachrc file, the same within or without internet.

Redhwan gravatar image Redhwan  ( 2021-03-02 02:59:53 -0600 )edit

The page you link to discusses ROS configuration after you've got your OS level network setup complete.

You ask:

Can I transmit data from the robot to my PC and vice versa over Wi-Fi's signal ?

Can I access the robot's computer using Wi-Fi's signal to launch the robot ?

If yes, please your suggestions, and what are its disadvantages?

those are all non-ROS questions, and additionally are questions about the OS level configuration of your system.

gvdhoorn gravatar image gvdhoorn  ( 2021-03-02 03:03:06 -0600 )edit
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