> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pads4.com/llms.txt
> Use this file to discover all available pages before exploring further.

# History

**History** (`/history`) is the connectivity-reliability view — uptime, outages, and per-device timelines — built entirely from the plugin's own local database (not a live PADS4 call), populated by a background status monitor. **Data is retained for 3 months**; the date pickers won't let you go further back.

* **Date range**: defaults to the last 30 days, clamped to the 3-month retention window.
* **Summary cards**: devices with data in range, total outage incidents (and how many are still ongoing), and total recorded offline time.
* **Devices table**: per-device uptime percentage, number of status checks, incident count, and total offline time. Search by name or device ID; sort any column.
* **View chart**: opens a modal with a step-line chart of that device's online/offline status over the selected range, plus the percentage of checks that were online. Long ranges are automatically downsampled for readability (noted in the modal when this happens).

> Uptime percentage is the share of periodic status *checks* that found the device online — it is not wall-clock uptime. Only *completed* outages (both a start and an end recorded) count toward the offline-time totals; an outage still in progress is flagged separately as "ongoing" and excluded from the duration sum.