Arduino Sensor Expansion Board - Revision history

Wikiadmin at 16:12, 16 September 2026

2026-09-16T16:12:09Z

Wikiadmin at 01:53, 8 September 2026

2026-09-08T01:53:38Z

← Older revision		Revision as of 09:53, 8 September 2026
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	 HTTP 500 — LittleFS is out of space; delete some photos first.		 HTTP 500 — LittleFS is out of space; delete some photos first.
			\|dl1Type=Demo
			\|dl1Name=A32 Photo 1 54.zip
			\|dl1File=A32 Photo 1 54.zip
	\|dl2Type=Document		\|dl2Type=Document
	\|dl2Name=A32_Photo_1_54_4Color_UserManual_EN_v1.0		\|dl2Name=A32_Photo_1_54_4Color_UserManual_EN_v1.0

Wikiadmin at 14:33, 4 September 2026

2026-09-04T14:33:37Z

← Older revision		Revision as of 22:33, 4 September 2026
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	{{ProductInfo		{{ProductInfo
	\|title=1.54 inch 4-color E-paper photo board		\|title=1.54 inch 4-color E-paper mini photo board
	\|model=1.54 inch Photo Board(4C)		\|model=1.54 inch Photo Board(4C)
	\|status=Published		\|status=Published

Wikiadmin at 14:30, 4 September 2026

2026-09-04T14:30:20Z

← Older revision		Revision as of 22:30, 4 September 2026
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	 HTTP 500 — LittleFS is out of space; delete some photos first.		 HTTP 500 — LittleFS is out of space; delete some photos first.
			\|dl2Type=Document
			\|dl2Name=A32_Photo_1_54_4Color_UserManual_EN_v1.0
			\|dl2File=A32 Photo 1 54 4Color UserManual EN v1.0.pdf
			\|dl3Type=Document
			\|dl3Name=A32_Photo_1_54_4Color_UserManual_RU_v1.0
			\|dl3File=A32 Photo 1 54 4Color UserManual RU v1.0.pdf
	\|displayMode={{{displayMode\|详情}}}		\|displayMode={{{displayMode\|详情}}}
	\|cardPage={{{cardPage\|{{PAGENAME}}}}}		\|cardPage={{{cardPage\|{{PAGENAME}}}}}

Wikiadmin at 14:27, 4 September 2026

2026-09-04T14:27:37Z

← Older revision		Revision as of 22:27, 4 September 2026
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	\|videoURL=https://youtu.be/4oKER54wsaw		\|videoURL=https://youtu.be/4oKER54wsaw
	\|specs={{{!}} class="wikitable"		\|specs={{{!}} class="wikitable"
	{{!}}+		{{!}}+Main Hardware
	!MCU		!MCU
	!<div>ESP32-C3 Super Mini (RISC-V single core, 4 MB Flash, 400 KB SRAM,WiFi + BLE)</div>		!<div>ESP32-C3 Super Mini (RISC-V single core, 4 MB Flash, 400 KB SRAM,WiFi + BLE)</div>
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	{{!}}SPI master-out, slave-in.		{{!}}SPI master-out, slave-in.
	{{!}}}		{{!}}}
	\|usage=~~# Align~~ the ~~expansion board with~~ the ~~controller board header~~.		\|usage=[[File:1.54 600-300-1.jpg\|center\|thumb\|600x600px]]
	~~# Install~~ the ~~matching display driver library~~.		\|faq=== <span style="color: rgb(52, 176, 176);">Q: Cannot Connect / Can't Find the WiFi</span> ==
	~~# Run color~~ and ~~touch test examples~~.		 Make sure the device has been powered on for over 5 seconds (the boot refresh takes
	~~# Adjust pin definitions and UI per project requirements~~.		about 12 ~ 15 seconds, and the hotspot has already begun broadcasting).
	~~\|faq~~=; ~~What if compilation~~ shows ~~insufficient capacity?~~
	~~: Reduce font and bitmap resources~~, ~~or choose~~ a ~~controller with more capacity~~.		 Pull down to refresh the WiFi list on your phone to see whether ePaperAlbum can be found.
	; ~~What if colors are abnormal?~~
	: ~~Check driver model~~, color ~~order~~, ~~and initialization orientation settings~~.		 If the hotspot disappears and reappears after a few minutes, this is normal (the device keeps it alive with an internal heartbeat).

			 In an extreme case: unplug the power, wait 10 seconds, then power back on; the device restarts the AP automatically.

			== <span style="color: rgb(52, 176, 176);">Q: Screen Doesn't Change After Upload</span> ==
			 First make sure the Web page status shows Sent and saved!, otherwise the upload did not succeed.

			 Make sure the uploaded file size is exactly 10,000 bytes (after dithering the browser shows "Preview ready"; it sends a fixed length).

			 If it stays on "Sending (refresh ~15s)..." for over 30 seconds, try re-plugging the USB.

			== <span style="color: rgb(52, 176, 176);">Q: Switch / Delete Does Not Respond</span> ==
			 The browser retries automatically 3 times (every 1.5 seconds); it usually recovers within 5 seconds.

			 If there is no response for a long time, the AP may be temporarily unreachable

			== <span style="color: rgb(52, 176, 176);">Q: Ghosting / Garbled Screen</span> ==
			 Occasional brief ghosting between different images is a normal physical property of epaper and isnot a fault.

			 If it has not recovered within 1 minute or the ghosting is severe, power the device off and on to reset.

			== <span style="color: rgb(52, 176, 176);">Q: Upload Failure (HTTP 400 / 500)</span> ==
			 HTTP 400 size mismatch — the uploaded byte count is not 10,000; do not upload manually outside the browser.

			 HTTP 500 — LittleFS is out of space; delete some photos first.
	\|displayMode={{{displayMode\|详情}}}		\|displayMode={{{displayMode\|详情}}}
	\|cardPage={{{cardPage\|{{PAGENAME}}}}}		\|cardPage={{{cardPage\|{{PAGENAME}}}}}

Wikiadmin at 14:21, 4 September 2026

2026-09-04T14:21:36Z

@@ Line 65: / Line 65: @@
 {{!}}None (photos stored in LittleFS)
 {{!}}}
-|hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
+|hardware={{{!}} class="wikitable"
 |usage=# Align the expansion board with the controller board header.
 # Install the matching display driver library.

Wikiadmin at 14:17, 4 September 2026

2026-09-04T14:17:19Z

@@ Line 33: / Line 33: @@
 |videoTitle=1.54 inch E-paper mini Photo Board(4 color)
 |videoURL=https://youtu.be/4oKER54wsaw
 |hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
 |usage=# Align the expansion board with the controller board header.

Wikiadmin at 14:10, 4 September 2026

2026-09-04T14:10:14Z

← Older revision		Revision as of 22:10, 4 September 2026
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	 HTTP server starts before the boot refresh and keeps responding throughout it, so it isaccessible as soon as you join the hotspot.		 HTTP server starts before the boot refresh and keeps responding throughout it, so it isaccessible as soon as you join the hotspot.

			= <span style="color: rgb(52, 176, 176);">3. Use Cases</span> =
			 Compact desktop photo frame: plug in and use, with no dependence on a router or cloud service.

			 Gift / ornament: converts photos of family and friends into a four-color e-paper style display.

			 Embedded / IoT learning reference: a complete ESP32 + WebServer + LittleFS practice.
	\|videoTitle=1.54 inch E-paper mini Photo Board(4 color)		\|videoTitle=1.54 inch E-paper mini Photo Board(4 color)
	\|videoURL=https://youtu.be/4oKER54wsaw		\|videoURL=https://youtu.be/4oKER54wsaw

Wikiadmin at 14:09, 4 September 2026

2026-09-04T14:09:08Z

← Older revision		Revision as of 22:09, 4 September 2026
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	\|image2=1.54 800-600-2.jpg		\|image2=1.54 800-600-2.jpg
	\|intro=Photo, ESP32, JD79660, SPI		\|intro=Photo, ESP32, JD79660, SPI
	\|highlights=* Expansion board ~~form factor for direct stacking on common controller boards~~.		\|highlights== <span style="color: rgb(52, 176, 176);">1. Product Overview</span> =
	* Suitable for dashboards, ~~menus~~, ~~and sensor~~ data display.		The 1.54" BWRY Mini Photo Album is a low-power frame built around the ESP32-C3 Super Mini controller and a 1.54" BWRY four-color e-paper display (driver IC: JD79660). It needs no internet or mobile app; just connect to the hotspot it broadcasts and open 192.168.4.1 in any browser to upload photos, browse the album and configure the slideshow. The device has no physical buttons or TF card slot, so all interaction is done in the browser;photos are stored in the on-board LittleFS file system and survive a power loss. The screen supports black / white / red / yellow four-color display; combined with the browser-side Floyd-Steinberg dithering, it renders color photos in fine detail as a four-color e-paper image.
	* Example parameters and ~~steps maintainable via admin form~~.
	* Standalone product ID: 3.		= <span style="color: rgb(52, 176, 176);">2. Key Features</span> =
			 1.54" BWRY four-color e-paper (200 × 200,2bpp, 10,000 bytes per frame).

			 WiFi AP direct mode: SSID = ePaperAlbum, password 88888888,IP 192.168.4.1.

			 Four-color dithering is done in the browser (no server involved); each image uses only ~10 KB of data.

			 LittleFS stores photos; NVS saves the current display and slideshow settings.

			 Supports gallery list, single-image switching, single/all deletion, and slideshow auto-play.

			 Supports EN / RU bilingual Web UI (English / Russian Web).

			 HTTP server starts before the boot refresh and keeps responding throughout it, so it isaccessible as soon as you join the hotspot.
	\|videoTitle=1.54 inch E-paper mini Photo Board(4 color)		\|videoTitle=1.54 inch E-paper mini Photo Board(4 color)
	\|videoURL=https://youtu.be/4oKER54wsaw		\|videoURL=https://youtu.be/4oKER54wsaw

Wikiadmin at 13:54, 4 September 2026

2026-09-04T13:54:08Z

← Older revision		Revision as of 21:54, 4 September 2026
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	\|status=Published		\|status=Published
	\|module=ESP32		\|module=ESP32
	\|image1=1.54 800-600-1.jpg		\|image1=1.54 800-600-1-1.jpg
	\|image2=1.54 800-600-2.jpg		\|image2=1.54 800-600-2.jpg
	\|intro=Photo, ESP32, JD79660, SPI		\|intro=Photo, ESP32, JD79660, SPI

← Older revision		Revision as of 00:12, 17 September 2026
Line 7:		Line 7:
	\|image2=1.54 800-600-2.jpg		\|image2=1.54 800-600-2.jpg
	\|intro=Photo, ESP32, JD79660, SPI		\|intro=Photo, ESP32, JD79660, SPI
	\|highlights== <span style="color: rgb(52, 176, 176);">1. Product Overview</span> =		\|highlights==== <span style="color: rgb(52, 176, 176);">1. Product Overview</span> ===
	The 1.54" BWRY Mini Photo Album is a low-power frame built around the ESP32-C3 Super Mini controller and a 1.54" BWRY four-color e-paper display (driver IC: JD79660). It needs no internet or mobile app; just connect to the hotspot it broadcasts and open 192.168.4.1 in any browser to upload photos, browse the album and configure the slideshow. The device has no physical buttons or TF card slot, so all interaction is done in the browser;photos are stored in the on-board LittleFS file system and survive a power loss. The screen supports black / white / red / yellow four-color display; combined with the browser-side Floyd-Steinberg dithering, it renders color photos in fine detail as a four-color e-paper image.		The 1.54" BWRY Mini Photo Album is a low-power frame built around the ESP32-C3 Super Mini controller and a 1.54" BWRY four-color e-paper display (driver IC: JD79660). It needs no internet or mobile app; just connect to the hotspot it broadcasts and open 192.168.4.1 in any browser to upload photos, browse the album and configure the slideshow. The device has no physical buttons or TF card slot, so all interaction is done in the browser;photos are stored in the on-board LittleFS file system and survive a power loss. The screen supports black / white / red / yellow four-color display; combined with the browser-side Floyd-Steinberg dithering, it renders color photos in fine detail as a four-color e-paper image.

	= <span style="color: rgb(52, 176, 176);">2. Key Features</span> =		=== <span style="color: rgb(52, 176, 176);">2. Key Features</span> ===
	 1.54" BWRY four-color e-paper (200 × 200,2bpp, 10,000 bytes per frame).		 1.54" BWRY four-color e-paper (200 × 200,2bpp, 10,000 bytes per frame).

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	 HTTP server starts before the boot refresh and keeps responding throughout it, so it isaccessible as soon as you join the hotspot.		 HTTP server starts before the boot refresh and keeps responding throughout it, so it isaccessible as soon as you join the hotspot.

	= <span style="color: rgb(52, 176, 176);">3. Use Cases</span> =		=== <span style="color: rgb(52, 176, 176);">3. Use Cases</span> ===
	 Compact desktop photo frame: plug in and use, with no dependence on a router or cloud service.		 Compact desktop photo frame: plug in and use, with no dependence on a router or cloud service.

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	{{!}}}		{{!}}}
	\|usage=[[File:1.54 600-300-1.jpg\|center\|thumb\|600x600px]]		\|usage=[[File:1.54 600-300-1.jpg\|center\|thumb\|600x600px]]
	\|faq=== <span style="color: rgb(52, 176, 176);">Q: Cannot Connect / Can't Find the WiFi</span> ==		\|faq==== <span style="color: rgb(52, 176, 176);">Q: Cannot Connect / Can't Find the WiFi</span> ===
	 Make sure the device has been powered on for over 5 seconds (the boot refresh takes		 Make sure the device has been powered on for over 5 seconds (the boot refresh takes
	about 12 ~ 15 seconds, and the hotspot has already begun broadcasting).		about 12 ~ 15 seconds, and the hotspot has already begun broadcasting).
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	 In an extreme case: unplug the power, wait 10 seconds, then power back on; the device restarts the AP automatically.		 In an extreme case: unplug the power, wait 10 seconds, then power back on; the device restarts the AP automatically.

	== <span style="color: rgb(52, 176, 176);">Q: Screen Doesn't Change After Upload</span> ==		=== <span style="color: rgb(52, 176, 176);">Q: Screen Doesn't Change After Upload</span> ===
	 First make sure the Web page status shows Sent and saved!, otherwise the upload did not succeed.		 First make sure the Web page status shows Sent and saved!, otherwise the upload did not succeed.

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	 If it stays on "Sending (refresh ~15s)..." for over 30 seconds, try re-plugging the USB.		 If it stays on "Sending (refresh ~15s)..." for over 30 seconds, try re-plugging the USB.

	== <span style="color: rgb(52, 176, 176);">Q: Switch / Delete Does Not Respond</span> ==		=== <span style="color: rgb(52, 176, 176);">Q: Switch / Delete Does Not Respond</span> ===
	 The browser retries automatically 3 times (every 1.5 seconds); it usually recovers within 5 seconds.		 The browser retries automatically 3 times (every 1.5 seconds); it usually recovers within 5 seconds.

	 If there is no response for a long time, the AP may be temporarily unreachable		 If there is no response for a long time, the AP may be temporarily unreachable

	== <span style="color: rgb(52, 176, 176);">Q: Ghosting / Garbled Screen</span> ==		=== <span style="color: rgb(52, 176, 176);">Q: Ghosting / Garbled Screen</span> ===
	 Occasional brief ghosting between different images is a normal physical property of epaper and isnot a fault.		 Occasional brief ghosting between different images is a normal physical property of epaper and isnot a fault.

	 If it has not recovered within 1 minute or the ghosting is severe, power the device off and on to reset.		 If it has not recovered within 1 minute or the ghosting is severe, power the device off and on to reset.

	== <span style="color: rgb(52, 176, 176);">Q: Upload Failure (HTTP 400 / 500)</span> ==		=== <span style="color: rgb(52, 176, 176);">Q: Upload Failure (HTTP 400 / 500)</span> ===
	 HTTP 400 size mismatch — the uploaded byte count is not 10,000; do not upload manually outside the browser.		 HTTP 400 size mismatch — the uploaded byte count is not 10,000; do not upload manually outside the browser.