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Updated version from 6.2.3 to 6.2.4 and added highlights.

2026-04-01 21:44:28 +02:00

Electricity Price Ticker – Version Information

Current firmware

BUG FIX: Exact-boundary display refresh bug
Problem: At the exact top of the hour (e.g., 20:00:00), the display automatically refreshed but showed the PREVIOUS hour's data (19:00). This happened because the "next-boundary" rounding logic in findCurrentPriceIndex() incorrectly excluded the current interval if the time was exactly on the boundary.
Fix: Simplified findCurrentPriceIndex() to use a robust "last entry <= now" comparison. This ensures the display transitions to the new hour instantaneously at XX:00:00.

BUG FIX: State-based display refresh logic
Problem: Screen would occasionally fail to update if the ESP32 was busy (fetching data or reconnecting WiFi) during the exact 00/15/30/45 minute mark.
Fix: Switched from "Event-Based" (refresh only AT minute X) to "State-Based" (refresh IF current time != last refresh time). This ensures the screen updates immediately even if the device was busy during the transition.

BUG FIX: Display blank lines issue
Problem: Sometimes rows 0 and 1 (current 15-min prices and current hour) were blank
Cause: The "hour suppression" logic was hiding the current hour unexpectedly
Fix:
- Row 1 (current hour) now ALWAYS shows - suppression logic only applies to rows 2-3
- Row 0 (15-min details) also always shows for the current hour

BUG FIX: Fixed findCurrentPriceIndex() to return the correct current interval.
Problem: At 17:57, it returned index for 18:00 instead of 17:45, causing display to show hour 18 instead of hour 17.
Fix: Now calculates next 15-minute boundary and finds the last entry before that boundary.

CRITICAL FIX: DST (Daylight Saving Time) handling is now fully fixed for all days.
Previously, the code assumed every day has exactly 96 price entries (24h × 4). This caused incorrect price display on DST switch days:
- Spring forward (March): Only 92 entries → wrong prices displayed
- Fall back (October): 100 entries → wrong prices displayed
Solution: All price lookups now use timestamp-based searching through the unix_seconds array instead of arithmetic calculation (hourIndex * 4).
New functions: findPriceIndexForHour(), findCurrentPriceIndex(), getHourFromPriceIndex()
Updated functions: getHourlyAverage(), display15MinuteDetails(), displayPriceRow(), displayPrimaryList(), updateLeds()
The ticker now works correctly on all days, including DST switch days, with no manual intervention.
Future-proof: If EU cancels DST, only the TZ_CET_CEST string needs updating (one line of code).

Fix: restore proper white LED price indicator behavior on ESP32 by avoiding mixing PWM (analogWrite) and digitalWrite on the same pin.
Fix: LED is now truly off when backlight/LED gating turns it off (no more "dim glow").

Version: 6.1.1 (2026-03-07) – Daily low/high marker includes negative and zero prices
Version: 6.1.0 (2026-01-30) – Midnight fetch and market day detection fixes
Version: 6.0.0 (2026-01-27) – NVS storage and daily fetch

For full details, see: