What regulates that in the Webpage appears the battery percentage?

[TheConstructAi]

Hi ,

I am using the slotcar plugin and for some reason, the battery percentage is not shown, although I'm publishing the battery state. In robots that don use the slotcar, it works perfectly, but for some reason the slotcar doesn't allow this to appear in the webpage.

Any ideas of why this could be happening? How does the information of the battery state reach the webpage? What are the nodes involved an the communication channels used?

Thanks

[Yadunund]

The battery % comes from the battery_percent field for each robot in the FleetState msg for a given fleet. If you're running a full control fleet adapter with a registered FleetUpdateHandle, it will take care of publishing the battery % if your adapter calls update_battery_soc().

When you say you're using the slotcar plugin, which fleet adapter are you using to control the robots in simulation? Is it the rmf_demos_fleet_adapter?

Also, from the screenshot above, it looks like you're using the deprecated rmf-panel. We strongly recommend switching to rmf-web which is better maintained and has a lot more features.

[aaronchongth]

Not that I know of. Are you sure that your device is not running out of disk space?

I just spun up an ubuntu:20.04 docker image and ran the same commands, and ./scripts/bootstrap.sh completed fine.

Here is the gist: https://gist.github.com/aaronchongth/adf58d8a02ab794a022e6e1e5c35b386

[TheConstructAi]

Great Advice! It worked! What a dumb error message!

Anyway, Is there anyplace where there is a kind fo tutorial on how to port existing old version dashboard to this new format?
Any example on that matter? Or any indication or docs?

Thanks Lot

[aaronchongth]

May I know what you mean by port? The use of rmf-web is documented in rmf_demos, https://github.com/open-rmf/rmf_demos#rmf-web, and further information about the dashboard can be found on the repository itself, https://github.com/open-rmf/rmf-web.

It seems like we have also diverged from the original question. Any further question should be a different discussion, or issue on its own. Do you still have any other questions regarding the battery percentages?

[TheConstructAi]

Well I didnt get the slotcar to at least make in the webpage appear the battery percentages, if that's question.
I don't quite understand how the battery status info gets to the webpage through the slotcar. Using the free fleet system, it shows but with simulated only slotcar simulations, it just appears that check box, no percentages

[aaronchongth]

The battery percentage is calculated in slotcar, https://github.com/open-rmf/rmf_simulation/blob/main/rmf_robot_sim_common/src/slotcar_common.cpp#L481-L488, and published as a RobotState which the demo fleet manager keeps track of, https://github.com/open-rmf/rmf_demos/blob/main/rmf_demos_fleet_adapter/rmf_demos_fleet_adapter/fleet_manager.py#L155.

the fleet adapter sends a request to get to obtain this battery https://github.com/open-rmf/rmf_demos/blob/main/rmf_demos_fleet_adapter/rmf_demos_fleet_adapter/RobotClientAPI.py#L174, and this gets populated into the robot state API, which the rmf-web dashboard uses.

The rmf_demos panel is not actively being maintained at the moment, the web dashboard should be the way to go to work with the demos.