Disconnected from ws://0.0.0.0:9090 on RPI4

[altineller]

Hello,

I managed to compile emsdk from source on a RaspberryPI 4 host, running ubuntu 18.04 and ros melodic. Then I catkin built roswasm_suite, and after installing all the failed dependencies, I managed to get 'roslaunch example_gui.launch' to launch.

However, on the webgui demo, it will show `disconnected from ws://0.0.0.0:9090' with a little red square next to it. I did check out .ros/log/latest but could not find anything that points to an error. I have the same setup/procedure running on my x86_64 laptop, and it does work, and the redsquare is green.

When I issue a rostopic list on the host, I only get:

/rosout
/rosout_agg
/sam/client_count
/sam/connected_clients

--

Any ideas on where I should start debugging the problem would be greatly appreciated.

Best regards,
-C.