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Log Tab

A Log tab is associated to each selected vehicle, and consists of the following main elements:

  • Refresh button
  • Event type selection
  • Text filter
  • Direct link to the shore.log file
  • Direct link to the ESP Logs directory
  • Event table
  • Buttons to load more events

Querying for Events

The set of events loaded by Dash4 for a given vehicle is the result of querying the TethysDash backend according to the following:

  • The parameter Number of events to load per vehicle upon a refresh in the Query section of the Frontend Settings. This parameter just puts a limit on the maximum number of records to retrieve from the backend.

  • The query to the backend is also determined by the selected event types:


    This event type selection condition has been added in v4.7.5.

As exposed in the selection dropdown, most of the event types have a direct 1-to-1 correspondence to the basic event types defined in the system, while other entries comprise families of such types:

  • Direct Comms -> Direct Comms ACK, Direct Comms Received
  • Sat Comms -> SAT Comms Request, SAT Comms Queued, SAT Comms Received.

Upon any desired changes in this selection, use the Apply button to perform the updated request. Type Esc or close the dropdown to cancel any changes.

Loading More Events

The buttons at the bottom of the table allow quickly loading more events from the backend and according to the current event type selection.

Note that any additional events loaded in this way will in principle remain loaded until the next regular refresh action (either explicit or via auto-refresh).


If you are using these buttons for more than just a quick inspection, you may want to temporarily disable the auto-refresh feature to avoid the potential "interference," while having better overall control.

Filtering on the UI side

You can use the filter field to select a subset of the loaded events for actual display in the table according to the entered text.

Literal filtering

This is the traditional and default mode of filtering. In this mode the filtering checks if the given input is a (case-insensitive) substring of the description, component, or name of the event.

Advanced filtering

You can also enable other advanced filtering modes in the General section of the Frontend Settings:

When enabled, the mode options will be included in the text field:

  • L: Literal filtering mode
  • G: Glob filtering mode
  • R: Regex filtering mode

Glob filtering

The "glob" mode interprets the standard * and ? characters as denoting "any sequence of characters" and "any single character", respectively. These are applied to each of the event attributes: description, component, name.

Note that a glob search is matched against the whole contents of the attribute.


  • triton*.sbd: attribute value starts with triton and ends with .sbd.

  • *PIC: attribute value ends in PIC.

Regex filtering

This mode applies a given regular expression for the filtering. As in the other modes, the match is applied to each of the event attributes: description, component, and name.


  • sci2.(speed|NeedCommsTime): attribute value contains sci2.speed or sci2.NeedCommsTime.

  • hardware|timeout: attribute value contains hardware or timeout.

  • ^got: attribute value starts with got.

  • minute$: attribute value ends with minute.

Note that without the anchors ^ or $, the filtering will apply the regex on any part of the attribute value.