v3.9.1

BambuHelper v3.9.1 - Release Notes

Firmware Builds

Build Target	Board / Hardware	Display	OTA Update File	Full Flash File
esp32s3	ESP32-S3 Super Mini	ST7789 240x240	BambuHelper-esp32s3-v3.9.1-ota.bin	BambuHelper-esp32s3-v3.9.1-Full.bin
esp32s3_round	ESP32-S3 Super Mini	GC9A01 1.28" round 240x240	BambuHelper-esp32s3_round-v3.9.1-ota.bin	BambuHelper-esp32s3_round-v3.9.1-Full.bin
esp32s3_zero	Waveshare ESP32-S3-Zero	external ST7789 240x240	BambuHelper-esp32s3_zero-v3.9.1-ota.bin	BambuHelper-esp32s3_zero-v3.9.1-Full.bin
esp32s3_zero_320	Waveshare ESP32-S3-Zero	external ST7789 240x320	BambuHelper-esp32s3_zero_320-v3.9.1-ota.bin	BambuHelper-esp32s3_zero_320-v3.9.1-Full.bin
esp32c3	ESP32-C3 Super Mini	ST7789 240x240	BambuHelper-esp32c3-v3.9.1-ota.bin	BambuHelper-esp32c3-v3.9.1-Full.bin
esp32c3_round	ESP32-C3 Super Mini	GC9A01 1.28" round 240x240	BambuHelper-esp32c3_round-v3.9.1-ota.bin	BambuHelper-esp32c3_round-v3.9.1-Full.bin
ws_lcd_200	Waveshare ESP32-S3-Touch-LCD-2	ST7789 240x320	BambuHelper-ws_lcd_200-v3.9.1-ota.bin	BambuHelper-ws_lcd_200-v3.9.1-Full.bin
ws_lcd_154	Waveshare ESP32-S3-Touch-LCD-1.54	ST7789 240x240	BambuHelper-ws_lcd_154-v3.9.1-ota.bin	BambuHelper-ws_lcd_154-v3.9.1-Full.bin
ws_lcd_280	Waveshare ESP32-S3-Touch-LCD-2.8	ST7789 240x320	BambuHelper-ws_lcd_280-v3.9.1-ota.bin	BambuHelper-ws_lcd_280-v3.9.1-Full.bin
es3n28p	QD ES3N28P 2.8"	ILI9341V 240x320	BambuHelper-es3n28p-v3.9.1-ota.bin	BambuHelper-es3n28p-v3.9.1-Full.bin
sc05_x	Panlee SC05_X (ZX2D80CE02S) 2.8"	ST7789 240x320 (8-bit parallel)	BambuHelper-sc05_x-v3.9.1-ota.bin	BambuHelper-sc05_x-v3.9.1-Full.bin
ws_lcd_350	Waveshare ESP32-S3-Touch-LCD-3.5	ST7796 320x480	BambuHelper-ws_lcd_350-v3.9.1-ota.bin	BambuHelper-ws_lcd_350-v3.9.1-Full.bin
ws_lcd_28c	Waveshare ESP32-S3-Touch-LCD-2.8C	ST7701 2.8" round 480x480	BambuHelper-ws_lcd_28c-v3.9.1-ota.bin	BambuHelper-ws_lcd_28c-v3.9.1-Full.bin
wt32_sc01_plus	Panlee WT32-SC01 Plus 3.5"	ST7796 320x480	BambuHelper-wt32_sc01_plus-v3.9.1-ota.bin	BambuHelper-wt32_sc01_plus-v3.9.1-Full.bin
jc3248w535	Guition JC3248W535 (ESP32-S3-N16R8, 16MB flash / 8MB PSRAM)	AXS15231B QSPI 320x480	BambuHelper-jc3248w535-v3.9.1-ota.bin	BambuHelper-jc3248w535-v3.9.1-Full.bin
cyd	ESP32-2432S028 (CYD / Cheap Yellow Display)	ILI9341 240x320	BambuHelper-cyd-v3.9.1-ota.bin	BambuHelper-cyd-v3.9.1-Full.bin
tzt_2432	TZT ESP32-2432S028 (CYD variant)	ILI9341 240x320	BambuHelper-tzt_2432-v3.9.1-ota.bin	BambuHelper-tzt_2432-v3.9.1-Full.bin
cyd_2432s024	ESP32-2432S024 (CYD 2.4")	ILI9341 240x320	BambuHelper-cyd_2432s024-v3.9.1-ota.bin	BambuHelper-cyd_2432s024-v3.9.1-Full.bin

OTA is for updating an already working device from the BambuHelper web UI.

Full is for first-time flashing, recovery, or ESP Web Flasher use.

First-time flashing? Easiest path is the hosted web flasher at keralots.github.io/BambuHelper - pick your board in the dropdown, click Install, and the browser handles bootloader + partitions + firmware in one go (no downloads, no flash offsets). The -Full.bin files below are only needed if you prefer the generic ESP Web Flasher.

Updating from v3.9.0? OTA the matching -ota.bin for your board, or use Check for updates. Settings carry over, nothing to redo.

New Features

Why did WiFi fail? The AP screen tells you

When BambuHelper cannot join your saved network and falls back to its own hotspot, it no longer just says "WiFi Setup". Before switching to AP mode it scans for your network and looks at why the connection was refused, then shows the reason as the screen title:

• WiFi not found - the network is not visible (switched off, out of range, or 5 GHz only - the ESP32 needs 2.4 GHz)
• WiFi name mismatch - the network is there, but its name differs in upper/lower case or stray spaces (names are case-sensitive)
• Weak WiFi -88 dBm - the network is there but the signal is too weak to hold a connection
• Wrong password? / Password too short
• Unsupported WiFi - WPA2 Enterprise (username + password) networks are not supported
• No IP from router - joined, but the router handed out no address

Join the hotspot and the setup page shows the full explanation with what to try, and fills in the network name for you (the exact spelling seen, on a name mismatch). This works both on boot and when a running device loses WiFi for good.

Cards: bigger temperatures on 320x240 landscape

With four or more temperatures (H2 printers with both nozzles, chamber, AMS), the landscape Cards print screen now lays them out as a grid with much bigger values instead of squeezing six into one row. The job name and progress move up to make room. With the AMS column at its tallest (four trays plus the external spool) or with the filament row picked, the screen keeps the single row.

Changes

• Cards is no longer marked beta. It stays opt-in - Gauges is still the default.

Bug Fixes

• Cards Ready screen after a print, 320x240 landscape: the "Print complete" headline and the job name ran into the big clock (most visible with a 12-hour clock). They are now shortened to fit beside it.