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Web Interface

The WattWächter Plus features a built-in web interface (WebUI) accessible via any browser on your local network.

Access

Open in your browser:

http://wattwaechter-XXXXXXXXXXXX.local

Alternatively, you can use the IP address directly. How to find the mDNS name or IP address of your WattWächter is described in our FAQ.

The following home page will open:

WattWächter web interface – home page

Services & Integration

The following features are accessible through the web interface:

Dashboard

The dashboard is the main view of the web interface and shows your energy data in real time.

WattWächter Dashboard

Authentication

If API authentication is enabled, you will be prompted for an API token when opening the dashboard. Enter the READ Token to view data.

Live Data

  • Current Power — Instantaneous consumption or feed-in in watts
  • Meter Reading (Import) — Cumulative total consumption (OBIS 1-0:1.8.0)
  • Meter Reading (Export) — Cumulative total feed-in (OBIS 1-0:2.8.0)
  • Average Power — Mean value over the observation period
  • Power Trend — Arrow indicating whether consumption is rising or falling

Live data is automatically updated every 5 seconds.

WattWächter Dashboard – Live Data

Live Chart

A line chart shows the power trend over the last 60 minutes. Hover over a data point to see the exact values.

WattWächter Dashboard – Live Chart

All Meter Values

An expandable section lists all OBIS codes received from the meter, including description, current value, and unit. This shows you which data your meter actually provides.

WattWächter Dashboard – All Meter Values

Statistics

  • Peak Power — Maximum power in the last hour
  • Minimum Power — Lowest power in the last hour
  • Measurements — Number of data points received
  • Uptime — Device runtime since last reboot

WattWächter Dashboard – Statistics

Historical Data

Below the live data, you'll find historical analysis in three views:

View Resolution Time Range Chart Type
Day 15 minutes 1 day (up to 30 days back) Line chart
Week Daily totals 7 days Bar chart
Month Daily totals 1 month Bar chart

Each view shows Import (consumption) and Export (feed-in) as separate data series. Use the previous/next buttons to navigate through time periods.

WattWächter Dashboard – Historical Data

Cloud Pairing

Connect your WattWächter to the Cloud Portal by entering the pairing token (format: WW-XXXXXXXX) into the input field and clicking "Start Pairing".

WattWächter Cloud Pairing

→ Detailed guide: Cloud Portal → Pair a Device

API Explorer

The "API Explorer" button opens an interactive API documentation that lets you test all REST endpoints directly in your browser.

  • All available endpoints with HTTP method (GET, POST, DELETE)
  • Security status (token required / public)
  • Request/response schemas
  • Input fields for parameters and request body
  • Direct execution with response display

WattWächter API Explorer

→ Full API documentation: API Reference

IR Self-Test

Tests the infrared transmit and receive electronics of the WattWächter. Hold the device about 3 cm above a mirror or a white sheet of paper and click "Start Test". The test sends a bit pattern via IR and checks whether it is correctly reflected back. After up to 5 attempts, the result is displayed.

WattWächter IR Self-Test

Help

The "Online Documentation" button takes you directly to this documentation site.

The "Info & Legal" link at the bottom of the page provides the following information:

  • Manufacturer Information — SmartCircuits GmbH, contact details
  • Open Source Licenses — Libraries used and their licenses
  • Usage Notices — Notes on calibration, privacy, and power supply