Release Notes¶

v1.1.7¶

Transformer ratio for current-transformer metering: meters in semi-indirect installations (e.g. 250A/5A = ratio 50) only display secondary values — the new transformer ratio under "Settings → Advanced" automatically converts currents, power values and energy readings to the actual primary values. Voltage remains unchanged. Applied consistently across live data, history, MQTT, cloud, Modbus and cost calculation
Feed-in details in the cost view: the daily and monthly cost breakdown now reports import and feed-in separately — including feed-in remuneration and balance per day or month. Particularly useful for PV systems and balcony power plants, available directly on the device even without a cloud account
Start firmware updates directly: new button in the device web interface under "Settings → Updates"
Improved crash diagnostics and general stability improvements in the background

Manage tariffs and electricity costs directly on the device: electricity prices with base fee, working price and feed-in tariff can now be configured — current, monthly and yearly costs are calculated and shown both in the app and via the web API
Support for pure PV feed-in meters: meters that only send the currently fed-in power (OBIS 2.7.0) are now recognised correctly. The instantaneous power is derived with the correct sign (negative = feed-in) — visible in live data, history, MQTT, cloud, Modbus and web API
Static IP address configurable: devices in networks with unreliable automatic IP allocation (DHCP) can now operate with a fixed IP address — configurable per WiFi profile in the device's web interface under "Settings → WLAN"
More meter values with plain-text labels: tariffs 5 through 8 for both import and export, per-phase feed-in power (OBIS 22/42/62.7.0), status word and manufacturer identifier are now displayed with readable labels instead of "Unknown" — particularly relevant for Easymeter devices and other multi-tariff meters
General stability and diagnostics improvements in the background

Dynamic WiFi transmit power: the device now adjusts its output to match the actual signal strength. Power draw drops noticeably with good reception, while full range is preserved when needed
General background stability improvements

New synthetic export counter (OBIS 2.8.0) for single-direction meters with PV / balcony solar setups: if the meter telegram does not include an exported-energy reading, the value is now derived from the live power — visible in live data, history, MQTT, cloud, Modbus and the web API
More stable daily update check: occasional reboots during the nightly update check on unstable WiFi links are gone
Consistent JSON format on the system info endpoint of the web API

Reliable cloud connection in complex WiFi networks (mesh, repeaters): live readings would previously arrive late or not at all on unstable links
Correct handling of certain meter readings: occasional misinterpretation of individual OBIS values fixed
More stable behaviour at the WiFi range edge: no more unnecessary reboots on persistently weak signal

New Modbus TCP server (SunSpec) for integration with Loxone, openHAB and other home automation systems
Automatic firmware updates: available updates are installed during the nightly update check (toggleable in the settings)
More robust Wi-Fi password handling: special characters (umlauts, €, …) are stored reliably; input fields warn about whitespace from copy/paste or overlong passwords
More stable history storage: old daily files are removed consistently after 30 days, with a permanent 200 KB reserve for updates
Settings page extended with new sections for Modbus and Updates

New central settings page in the web interface for Wi-Fi, access point, time, MQTT, and cloud connection
Configurable name and password for the access point; AP state is retained across reboots
More stable Wi-Fi connection, especially in mesh networks (UniFi, FRITZ!Mesh)
More robust reception of smart meter telegrams under load
Smoother reconnect after MQTT or cloud outages with progressively longer back-off intervals
Improved diagnostics for OTA updates; old historical data files are reliably removed after 30 days

Fixed sporadic measurement outliers on certain meter types (including Landis+Gyr). Occasional erroneous readings transmitted by the meter are now reliably filtered out.

Support for meters that only send tariff registers (e.g. 1.8.1) instead of total registers (1.8.0)
Faster value updates for SML meters by disabling the median filter
Configurable median filter for OBIS/D0 meters (1–9, default: 5)
Minimum MQTT send interval clamped to 1 second

Support for export meters that only report OBIS 15.7.0 (absolute power) instead of 16.7.0 (signed power). Current power is now correctly displayed in the dashboard for these meters.

Fixes an issue where meters with binary identifiers did not show live data on the dashboard and in the app
Automatically detects locked smart meters and shows a notice in the dashboard and in the app
Improves device reboot stability on weak power supplies

Improved stability on unstable WiFi connections (device could restart in rare cases after a connection drop)
Support for smart meters with many readings (e.g. phase angles, per-phase currents) – the local dashboard now displays all values correctly

Improved support for special characters in network name and password during WiFi setup via app (e.g. backslash, quotes)
Correct display of WiFi names with special characters in system info and settings
WiFi scan via app now correctly shows network names with special characters

First stable firmware version for the WattWächter Plus.