BambuHelper v2.6 Release Notes

New features

Configurable gauge layout (per-printer)

• Choose which widget goes in each of the 6 gauge slots on the printing screen - any combination of Progress, Nozzle Temp, Bed Temp, Part Fan, Aux Fan, Chamber Fan, Chamber Temp, Heatbreak Fan, Clock, or Empty
• Layout is configured per printer, useful when running different models (e.g. A1 without chamber fan vs P1S with all fans)
• New gauge types: Chamber Temp, Heatbreak Fan, and Clock (HH:MM widget)
• Dedicated color settings for the new gauge types in the Display section
  Inspired by @i-snake-z BambuHelper Fork.

Idle clock improvements

• Flicker-free updates - only changed digits are redrawn
• Blinking colon - 500ms on/off between hours and minutes
• Customizable clock colors - new "Time color" and "Date color" pickers, with per-theme defaults
  Inspired by @i-snake-z BambuHelper Fork.

Button click sound (buzzer feedback)

• New optional "Click sound when button pressed" checkbox in buzzer settings - audible feedback for capacitive touch buttons (TTP223) that have no physical click
• Only appears when both button and buzzer are enabled
• Short 4kHz tick (8ms), ignores quiet hours since it's user-initiated

CYD / ESP32-C3: single printer limit

• CYD and ESP32-C3 boards are now limited to 1 printer - not enough RAM for two simultaneous TLS+MQTT connections
• Web UI hides "Printer 2" tab on these boards with an info banner
• ESP32-S3 is unaffected and continues to support 2 printers

Bug fixes

Cloud mode: stale "Ready" status for powered-off printers

• Display previously kept showing "Ready" with cached temperatures when a cloud printer was powered off
• After 5 minutes without updates, cached telemetry is cleared and display shows "Waiting..." instead
• Button press on "Waiting..." triggers a manual cloud refresh; "Press to refresh" hint appears after 60 seconds

Stale FINISH recovery for silent printers

• Fixed printers getting stuck on "Print Complete" with frozen data if MQTT updates stopped after finishing
• Recovery pushall is attempted first, then state is cleared to "Waiting..." if the printer stays silent

Slow screen wake-up on button press

• Waking the display from sleep/clock took 3-4 seconds because MQTT reconnect (TLS handshake / TCP test) blocked the main loop
• Reordered main loop: button handling and display update now run before MQTT
• Disconnected MQTT sessions skip reconnect on the wake iteration so the screen lights up instantly
• Reduced LAN TCP reachability timeout from 3s to 1s (on-network printers respond in <50ms)

Finish screen timeout reliability

• Fixed "display off / show clock after print complete" timeout failing on the FINISH screen
• Timeout now works at the screen-state level regardless of WiFi/MQTT connection status

Breakout clock (Pong) fixes

• Customizable time/date colors from Display Settings
• Respects selected date format (all 6 options)
• Fixed ball getting stuck in an infinite bounce loop between bricks
• 12h/24h toggle now properly resets the Breakout clock state

Print Complete: Tasmota power display

• Finish screen now shows live power draw in watts alongside the per-print kWh total
• Fixed Tasmota data not returning after temporary network interruption

Stability & internals

Security: credentials removed from HTML and API

contributed by @theNailz in #39

• WiFi password and access code no longer exposed in page source or DevTools
• Access code removed from /config JSON API response

WiFi reconnection with exponential backoff

contributed by @theNailz in #40

• 3-phase backoff: 10s (5x) -> 30s (5x) -> 60s (indefinite), replaces "5 attempts then permanent AP mode"
• AP+STA coexistence - config portal stays accessible while STA probing continues
• Automatic STA recovery every 2 minutes from AP mode

Stuck connecting screen recovery

contributed by @theNailz in #41

• Display recovers to clock/idle after 60 seconds stuck on "Connecting" instead of hanging indefinitely

OTA firmware size validation

contributed by @theNailz in #42

• Validates firmware size against OTA partition boundary before writing
• Optional MD5 checksum verification via X-MD5 header

Web interface: streamed template rendering

contributed by @theNailz in #38

• Settings page streamed from flash instead of copied into a ~64KB heap buffer
• Peak heap usage drops from ~130KB to ~2KB, fixing silent failures on ESP32-C3
• Fixed empty timezone dropdown on low-RAM boards

Other

contributed by @theNailz in #38, #43

• Non-blocking web server restarts (no more watchdog resets during save/OTA)
• Buzzer quiet hour input validation
• NVS timezone migration consolidated into a single transaction with tz_migrated flag