Connection fail with browser from external PC

RobotWebTools / ros2-web-bridge

Bridging your browser to the ROS 2.0

Apache License 2.0

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Connection fail with browser from external PC #154

Closed botamochi6277 closed 4 years ago

botamochi6277 commented 4 years ago

I have connection error to publish from browser.

I logged in my ros pc (raspberry pi 4 installed foxy) with ssh and executed following command.

Terminal 1:

node bin/rosbridge.js

Terminal2:

cd examples && node index.js

When I opened http://foxy.local:3000/html/publisher.html from my host PC, the following page appeared. foxy is hostname of the raspberrypi.

Google Chrome said "WebSocket connection to 'ws://localhost:9090/' failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED Ros.connect @ roslib.js:2224 (anonymous) @ publisher.html:39".

minggangw commented 4 years ago

Please try to change the address of ws server to your actual one, I think it should be the address of raspberry pi 4

https://github.com/RobotWebTools/ros2-web-bridge/blob/248f2ee44c525ebbd7c90e7c056ba62f3939eb02/examples/html/publisher.html#L39

This simple demo is designed to run the bridge and the web browser on the same machine.

botamochi6277 commented 4 years ago

Thank you for replying. I succeed to publish when i run the bridge and the web browser on the same raspberry pi. I fail to do, although, when i run the web browser on another pc with actual address (192.168.4.2).

minggangw commented 4 years ago

I fail to do, although, when i run the web browser on another pc with actual address (192.168.4.2).

What's the error log? still net::ERR_CONNECTION_REFUSED?

I suggest you could create a WebSocket and try to connect to the address of raspberry pi, thus we could make sure it's reachable. Also, please run the bridge DEBUG=ros2-web-bridge* node bin/rosbridge.js to enable debug output and get more useful information.

botamochi6277 commented 4 years ago

I succeed to publish topics with the web browser from my Mac (external PC). I edit line 40 in examples/html/publisher.html as below, ros.connect('ws://localhost:9090'); -> ros.connect('ws://foxy.local:9090');. foxy is hostname of my rospc running ros2-web-bridge.

Mac may try to connect 'ws://localhost:9090' as 'ws://[mac ip address]:9090'.

minggangw commented 4 years ago

Great! So could we close this issue now?

botamochi6277 commented 4 years ago

Yes, Please.

minggangw commented 4 years ago

Close this issue, please feel free to reopen it if you still have problems, thanks!