Tinca/Docs/Widgets/Notification Feed

Notification Feed

PRO
STATUS · 8 FIELDS · 4×2 DEFAULT

Live log stream from /rosout with severity filtering

When to reach for it

Notification Feed is the live log viewer: severity-filtered messages from /rosout, with optional timestamps and node names. Use it during long autonomous runs, anytime you want the robot's own log messages visible alongside the dashboard. For raw topic data including non-log messages, use Topic Log (Pro). For your own publish events, Publish Log.

Worked example: Nav2 navigation run

Point Log Topic at /rosout, which auto-fills Message Type to rcl_interfaces/msg/Log. Set Min Severity to Warning so the feed only surfaces what needs attention during a long Nav2 run, then drop it to Info while debugging a specific failure. Leave Auto-scroll on for hands-off monitoring, off when you want to scroll back through what just happened without the view jumping.

Watch out for
  • Min Severityfilters messages after they've already reached /rosout; it doesn't touch the node's own logger level. If you set it to Debug and still see nothing, raise the verbosity on the robot, not in Tinca.
  • Max Message Rate (Hz) defaults to 20, whatever Max Entries says; a node logging faster than that has entries dropped before severity filtering ever sees them. Raise it for a chatty node.
  • Switching Log Topicwipes the buffer immediately, so swap topics only when you're done reading, not mid-incident.

Configuration fields

Log Topictopic

The log topic (rcl_interfaces/msg/Log), usually /rosout.

Message Typestring

The ROS message type, like sensor_msgs/msg/Image. Fills in when you pick a topic.

Max Message Rate (Hz)number

Messages per second this widget takes from the topic. Lower saves data, higher shows more.

0.1 to 60, step 0.1
Min Severityselect

Hide messages below this level. Error shows only errors and fatals.

DebugInfoWarningErrorFatal
Max Entriesslider

How many recent log lines to keep before old ones drop off.

20 to 500, step 10
Auto-scrollboolean

Keep the newest message in view as logs arrive.

Show Timestampboolean

Show the time each message arrived.

Show Node Nameboolean

Show which node logged each message.