Changelog

0.4.0 - 2026-06-04

Embedded tabbed WebUI.
Overview, Battery, and Config tabs.
Estimated runtime display.
Battery detail page with BMS status, cell voltages, cell delta, capacity, remaining Ah, cycles, and battery temperature.
WebUI setup workflow.
Device name configuration from WebUI.
Relay name configuration from WebUI.
Temperature sensor name and enabled-count configuration from WebUI.
Temperature probe scan and assignment workflow from WebUI.
BMS enable/disable controls from WebUI.
BMS reconnect action from WebUI/API.
System restart action from WebUI/API.
WiFi AP + STA mode.
Multiple saved STA WiFi networks.
WiFi priority and runtime reconnect behavior.
HTTP/UART/USB serial command parity documentation.
DS18B20 configurable temperature probe support.
Preferred relay command endpoint: POST /api/v1/relay/set.

ESP32 remains the controller/source of truth.
WebUI is now the preferred initial configuration workflow.
Waveshare ESP32-S3 is the primary physical dashboard target.
ESP32 relay board outputs are treated as control/trigger outputs for external fused automotive relays/contactors on major loads.
BMS source now reports configured JBD BMS even when disconnected.

Restored default NimBLE connection behavior after custom timeout caused BMS connection failures.
Trimmed WiFi credentials from setup inputs.
Improved WebUI organization by moving setup/configuration controls to the Config tab.

BMS connection can still temporarily block the ESP32 while attempting BLE connection if the BMS is out of range.
WebUI BMS disable/enable controls are intended to make bench testing easier.
DS18B20 multi-probe final install should use a proper terminal/distribution board rather than temporary Wago wiring.