TransformerViewer Library U1.2
================================

Requires:
- ESP32
- ProjectUNION 0.2.2
- PubSubClient
- INA226 library

This version migrates the original TransformerViewer v1.5 configuration
from Preferences namespace:

  ina226 / config

to the ProjectUNION namespace:

  project-union

The migration is performed once. It preserves:
- WiFi SSID and password
- hostname
- language
- MQTT broker, port, user, password and TLS setting
- device name
- base topic
- transformer offset
- measurement interval
- active transformers
- descriptions and locations

Important:
The old "ina226" configuration is not deleted, so returning to the old
firmware remains possible.

First test recommendation:
Upload to only one TransformerViewer first and verify all settings before
updating the second unit.


Changes in U1.1
---------------
- Replaced the temporary gauge icon with the TransformerViewer transformer icon.
- Moved the project icon into the project-specific file project_icon.h.
- ProjectUNION library remains unchanged.
- Project version updated to U1.1.


Changes in U1.2
---------------
- Display name changed from TransformerViewer to Transformer Viewer.
- The browser sidebar can now wrap the name naturally onto two lines.
- Hostname and migrated configuration remain unchanged.
- Requires ProjectUNION 0.2.2.


Changes in U1.3
--------------------------------
- Updated for ProjectUNION 0.2.2.
- Removed the hardcoded UNION Core version from UnionIdentity.
- The displayed Core version now comes directly from the installed library.
- Project functionality and stored configuration are unchanged.


Changes in U1.4 Modular
-----------------------
- Updated for the modular ProjectUNION architecture.
- Uses ProjectUNION Core 0.3.1.
- Uses ProjectUNION MQTT 0.3.1.
- Does not include or depend on ProjectUNION DCC or NmraDcc.
- Existing legacy migration, INA226 measurements, web configuration and MQTT remain unchanged.
