tools: Add stats menu and widget, with rate and totals around incoming/outgoing messages

[rafaellehmkuhl]

New Features

Name	Description	Purpose	Sources	Future
Tools / Stats	Helps the user know whether Cockpit is sending/receiving MAVLink messages	Troubleshooting		This is a start - in future it could include more information sources, and/or display things in more intuitive ways.
Stats mini-widget	Tools / Stats, but in mini-widget form	Live connection monitoring

Kapture.2025-05-26.at.17.26.49.mp4

Kapture.2025-05-26.at.18.06.30.mp4

Modified Features

Setup

• Autopilot connection (MAVLink)
  • Allows peace of mind checking that messages are being sent and received, and/or helps determine which direction a connection is failing in if it is not working properly

Vehicle usage

• Connection stability
  • Significant message rate changes can indicate connection instability when it is not lost for long enough to be considered disconnected
• MAVLink message monitoring
  • MAVLink-specific variant of connection stability point

Tests Required to Merge (by dev and/or testers)

Text/display changes

• Open Cockpit
• Confirm the change displays as expected
• Test multiple screen sizes
  • Steam deck
  • 1080p laptop screen

Functionality changes

• Connect to the vehicle
  • Connect a joystick, and confirm at least one button and one axis works
• Confirm existing widgets load as expected
• Check that memory usage seems bounded
• Test critical vehicle functions
  • Arm and disarm
  • Switch flight modes
• Switch users without unexpected errors

[ArturoManzoli]

It's visually very nice

I noticed on the code a number of comments that is way larger than usual.
Some of these comments are a little redundant with the function names and some are describing elements that would be ok without a comment.

Can you review them?

[rafaellehmkuhl]

It's visually very nice

I noticed on the code a number of comments that is way larger than usual. Some of these comments are a little redundant with the function names and some are describing elements that would be ok without a comment.

Can you review them?

Removed some of them that appeared to be unnecessary. Let me know if there are any others that you think should be removed as well.

[rafaellehmkuhl]

ping @ArturoManzoli

[ES-Alexander]

I like the potential of this page. It seems to quite naturally extend to including things like network latency, video stream stats, and tether diagnostics (maybe an API would be useful?) :-)

---

From some light testing, this seems to mostly work as expected, except that the MAVLink time-related stats seem poorly determined - they're frequently showing up as negative (e.g. the message was received more recently than the "current time" timestamp it's being compared to):

[rafaellehmkuhl]

I like the potential of this page. It seems to quite naturally extend to including things like network latency, video stream stats, and tether diagnostics (maybe an API would be useful?) :-)

From some light testing, this seems to mostly work as expected, except that the MAVLink time-related stats seem poorly determined - they're frequently showing up as negative (e.g. the message was received more recently than the "current time" timestamp it's being compared to):

Unfortunately this is a problem in mavlink2rest itself. If you open it's frontend, you will see the same values.

@patrickelectric any idea on that?