webviz won't connect to robot?

[adimehrotra]

Hello I'm, trying to use WebViz for a project and I'm not sure what is going on/why it is not working.

I have a remote websocket running for my ROS robot at ws://192.168.1.24:9090 and I changed the ports and URL and everything so I ran https://webviz.io/app/?rosbridge-websocket-url=ws://192.168.1.24:9090/ in the web browser.

And I went to google chrome settings and changed the settings to allow insecure connections. What am I doing wrong here? Why can't I get webviz to connect to a remote websocket?

[jtbandes]

What errors are you seeing?

[adimehrotra]

I'm not seeing any errors which is why I'm confused. When I tried to connect to this web-socket using ROSWEB it connected fine and I was able to get data out of the system. And then if I look on my robot itself the rosbridge outputs to /rosout "one client connected." or something similar

I went to webviz and put in the same ws url, and /rosout showed no message that there was a client connected?

[adimehrotra]

For reference: this works: https://github.com/EESC-LabRoM/rosweb

[adimehrotra]

For a little more information: I brought up a Raw Messages panel on the webviz and typed /joy to see the raw messages for /joy that's what I started with trying (my bigger issue is that I don't see the client connected though as I described above)

[janpaul123]

What version of rosbridge_server are you running?

[adimehrotra]

I just went here: http://wiki.ros.org/rosbridge_suite/Tutorials/RunningRosbridge and did sudo apt install ros-melodic-rosbridge-suite ... does that give me the latest version? How would I check?

[janpaul123]

You can check by running apt policy ros-melodic-rosbridge-server. Which version gets installed when you run apt install depends on a bunch of things.

[adimehrotra]

Here is the version (I think it's 0.11.5-1bionic.20200413.152945). Thanks for the info :)

[janpaul123]

Hm, that version should be fine. 0.11.6 is the latest, but 0.11.5 should work. Could you maybe record a video of what's happening? If we can't figure it out from that, I might be able to set you up with a screenshare with someone on our team.

[adimehrotra]

Hey! Here's a link to the video I recorded, I'm ssh'ed into the robot from VS Code and then the google Chrome is on my macbook.

https://www.adim.io/post/chip-updates-websocket-won-t-work-updates

[adimehrotra]

let me know if you need more information?

[janpaul123]

Hm not sure, can you email me at jp.posma@getcruise.com and we can do a screen share.

[flynneva]

try passing the devices IP address to the rosbridge_webserver. it looks like right now you're just passing in the default which is localhost.

I think it is working for the ROSWEB site because it is an http site, not an https.

also, look into these other topics which seem similiar:

• wss support
• wss support 2
• wss support 3

[adimehrotra]

I'll definitely try adding the IP to rosbridge_webserver, but I also enabled "use unsafe scripts" for webviz on chrome will that not fix the security issue with https?

[adimehrotra]

Are you saying I need to do : https://answers.ros.org/question/198647/rosbridge-websocket-ssl-connection-aborted/ kind of stuff to setup ssl?

[flynneva]

my comment above was just providing some comments on where I would go if I was debugging your setup. since all we have is just a video to debug from and its not entirely clear what the issue is, I cant really say what will solve your problem.

[adimehrotra]

thanks for the info :) I was just wondering if saying my robot was running a jetson tx1 does that change anything? realized I haven't mentioned that and that I know they're kinda weird.

[flynneva]

I know this kind of defeats the purpose of what you are trying to do...but a good debug step would be to test webviz locally on the jetson tx1 (if you can hook it up to a monitor & get a browser open). if that works, then it most likely is an issue with the security (https vs http) as linked above.

[adimehrotra]

Ah. This was a good suggestion! I did hook it up and run a local test and it does work locally so I think you're right on the ssl permissions side. I'm speaking with JP in a few minutes and I think we'll come up with a solve - if not I'll re-post here if we do, I'll close the issue :) Thanks so much for your help.

[adimehrotra]

JP called me and we fixed the problem - thank you so much t of both of you - it was lovely meeting you guys!

[janpaul123]

For future reference, we had to do this:

A modal with this image + some instructions should have been shown though, so that's a bug that I'll have to look into. Nice meeting you too Adi!

[jaguardo]

I'm not seeing that option on any of the browsers I've tried... is there a browser setting to change?

[jaguardo]

So for those that are interested, for Chrome I had to do a few extra steps... I wasn't getting the "sheild" and at first I was getting the "Secure" symbol on Chrome:
even when I added the ip address to another computer on the network. makes it appear everything is ok... unfortunately it will not load!! with no warning on why...

https://webviz.io/app/app/?rosbridge-websocket-url=ws://xxx.xxx.x.xxx:9090

so, by clicking on the "lock" and opening site settings: I can set chrome for that website to allow insecure content: you can now reload the page (Chrome will pimp you to do this anyways) now, when you load the basic website:

https://webviz.io/app/

you will still see the traditional lock, but when you use the alternative address for an ip, you will not get the lock, but a nice "not secure" warning and the shield as you would in previous editions of chrome? now by clicking on the shield you can load those scripts: hope it helps someone!

[vidaaudrey]

Thank you @jaguardo for documenting the details.

[marcelino-pensa]

Would it be possible to add a link to this issue in the error message that webviz.io/app displays? I spent quite a bit of time trying to figure out why my shield wasn't showing up, which could be easily solved by visiting this page (I had to google very specifically to end up in here)

[cjds]

@vidaaudrey do you mind if I make a PR that updates the help?

[vidaaudrey]

@cjds thank you! Please feel free to make a PR for this and tag me for reviewing :)