Logs

What it does

System status → Logs reads the log tail of any Device this C21 Live Control instance manages — the Control host itself or a registered Encoder — straight in the browser. The view polls for new lines (a "Last updated at …" timestamp shows the last refresh) and lets you filter by severity and download the full file.

Two tabs split the everyday log from the verbose one:

• Logs — the operational log (control.log): start/stop events, scheduler activity, warnings and errors. This is the tab you read day to day.
• Debug logs — the verbose diagnostic log (control.log.debug): low-level internal trace, useful when working through an issue with Cires21 support. Much higher volume; paginated.

UI Interface

Entries are color-coded by severity (Info neutral, Warning amber, Error red) and prefixed with their timestamp and the emitting component.

API surface

The view polls a single endpoint for the tail, selecting the Device by ip (the Control answers on 127.0.0.1; an Encoder on its LAN address):

• file is control.log for the Logs tab and control.log.debug for the Debug logs tab.
• numLines maps to the Show N entries selector; offset advances the pagination window.
• The Device picker is populated by GET /c21apiv2/devices?includeControl=1.

Cross-links

• Commands — run maintenance commands on the same Devices.
• Devices — register the Encoders whose logs appear here.
• Install C21 Live Control — livecontrol logs reads the same log on the host.

FAQ