4.2 inch Photo Board - Revision history

Wikiadmin at 09:27, 17 October 2026

2026-10-17T09:27:25Z

← Older revision		Revision as of 17:27, 17 October 2026
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	\|dl3Name=4.2inch Photo Board 4C UserManual RU v1.0.pdf		\|dl3Name=4.2inch Photo Board 4C UserManual RU v1.0.pdf
	\|dl3File=4.2inch Photo Board 4C UserManual RU v1.0.pdf		\|dl3File=4.2inch Photo Board 4C UserManual RU v1.0.pdf
			\|dl4Type=Document
			\|dl4Name=Photo_4_2_Inch_SchDoc_V20.pdf
			\|dl4File=Photo 4 2 Inch SchDoc V20.pdf
	\|displayMode={{{displayMode\|详情}}}		\|displayMode={{{displayMode\|详情}}}
	\|cardPage={{{cardPage\|{{PAGENAME}}}}}		\|cardPage={{{cardPage\|{{PAGENAME}}}}}

Wikiadmin at 09:21, 17 October 2026

2026-10-17T09:21:51Z

← Older revision		Revision as of 17:21, 17 October 2026
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	A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.		A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.
	\|dl1Type=Demo		\|dl1Type=Demo
	\|dl1Name=~~A32 Photo 4 2 v1.0~~.zip		\|dl1Name=A32_Photo_4_2_v20.zip
	\|dl1File=A32 Photo 4 2 ~~v1.0~~.zip		\|dl1File=A32 Photo 4 2 v20.zip
	\|dl2Type=Document		\|dl2Type=Document
	\|dl2Name=4.2inch Photo Board 4C UserManual EN v1.0.pdf		\|dl2Name=4.2inch Photo Board 4C UserManual EN v1.0.pdf

Maintenance script: Maintenance script moved page Arduino Communication Board to 4.2 inch Photo Board: 按要求批量更名产品页

2026-09-18T14:15:03Z

Maintenance script moved page Arduino Communication Board to 4.2 inch Photo Board: 按要求批量更名产品页

← Older revision		Revision as of 22:15, 18 September 2026
(No difference)

Wikiadmin at 16:13, 16 September 2026

2026-09-16T16:13:08Z

Wikiadmin at 08:54, 9 September 2026

2026-09-09T08:54:45Z

← Older revision		Revision as of 16:54, 9 September 2026
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	3. The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all.		3. The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all.
			\|videoTitle=4.2 inch 4-color E-paper photo board
			\|videoURL=https://youtu.be/iRNHopQgSzI
	\|specs={{{!}} class="wikitable"		\|specs={{{!}} class="wikitable"
	{{!}}+Key Features		{{!}}+Key Features

Wikiadmin at 08:50, 9 September 2026

2026-09-09T08:50:12Z

← Older revision		Revision as of 16:50, 9 September 2026
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	== <span style="color: rgb(52, 176, 176);">Q4:Screen doesn't update after upload?</span> ==		== <span style="color: rgb(52, 176, 176);">Q4:Screen doesn't update after upload?</span> ==
	A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.		A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.
			\|dl1Type=Demo
			\|dl1Name=A32 Photo 4 2 v1.0.zip
			\|dl1File=A32 Photo 4 2 v1.0.zip
			\|dl2Type=Document
			\|dl2Name=4.2inch Photo Board 4C UserManual EN v1.0.pdf
			\|dl2File=4.2inch Photo Board 4C UserManual EN v1.0.pdf
			\|dl3Type=Document
			\|dl3Name=4.2inch Photo Board 4C UserManual RU v1.0.pdf
			\|dl3File=4.2inch Photo Board 4C UserManual RU v1.0.pdf
	\|displayMode={{{displayMode\|详情}}}		\|displayMode={{{displayMode\|详情}}}
	\|cardPage={{{cardPage\|{{PAGENAME}}}}}		\|cardPage={{{cardPage\|{{PAGENAME}}}}}

Wikiadmin at 08:46, 9 September 2026

2026-09-09T08:46:31Z

← Older revision		Revision as of 16:46, 9 September 2026
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	\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]		\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]
	[[File:4.2 inch-800-600-3.jpg\|center\|thumb\|800x800px]]		[[File:4.2 inch-800-600-3.jpg\|center\|thumb\|800x800px]]
	\|faq=; ~~What if compilation~~ shows ~~insufficient capacity~~?		\|faq=== <span style="color: rgb(52, 176, 176);">Q1:Screen shows nothing after flashing?</span> ==
	: ~~Reduce font and bitmap resources~~, ~~or choose~~ a ~~controller with more capacity~~.		Check that the FPC 24P cable is firmly seated and oriented correctly (typically metal side up); make sure the supply is stable (recommend a 5 V / 1 A or better USB-C source).
	; ~~What if colors are abnormal~~?
	: ~~Check driver model~~, color ~~order~~, ~~and initialization orientation settings~~.		== <span style="color: rgb(52, 176, 176);">Q2:Cannot find the USB-SERIAL CH340 port?</span> ==
			Try a different data cable (some cheap cables only charge); install the CH340 driver manually under Windows; hold BOOT while powering on to force the ESP32 into download mode.

			== <span style="color: rgb(52, 176, 176);">Q3:Web page won't open (192.168.4.1 no response)?</span> ==
			Confirm the phone / computer has joined the board's AP hotspot (SSID: ePaperDisplay).Some phones conflict with mobile data — temporarily disable mobile data, or wait a few seconds after connecting.

			== <span style="color: rgb(52, 176, 176);">Q4:Screen doesn't update after upload?</span> ==
			A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.
	\|displayMode={{{displayMode\|详情}}}		\|displayMode={{{displayMode\|详情}}}
	\|cardPage={{{cardPage\|{{PAGENAME}}}}}		\|cardPage={{{cardPage\|{{PAGENAME}}}}}

Wikiadmin at 08:43, 9 September 2026

2026-09-09T08:43:43Z

@@ Line 38: / Line 38: @@
 {{!}}<div>Schematics, firmware source code and Web UI are all open;secondary development is supported</div>
 {{!}}}
-|hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
+|hardware=== <span style="color: rgb(52, 176, 176);">1.1 Connect Power</span> ==
 |usage=[[File:4.2 inch-600-300-4.jpg|center|thumb|600x600px]]
 [[File:4.2 inch-800-600-3.jpg|center|thumb|800x800px]]

Wikiadmin at 08:38, 9 September 2026

2026-09-09T08:38:40Z

@@ Line 12: / Line 12: @@
 . The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all.
 |hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
 |usage=[[File:4.2 inch-600-300-4.jpg|center|thumb|600x600px]]

Wikiadmin at 08:34, 9 September 2026

2026-09-09T08:34:37Z

← Older revision		Revision as of 16:34, 9 September 2026
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	\|image1=4.2 inch-800-600-1.jpg		\|image1=4.2 inch-800-600-1.jpg
	\|image2=4.2 inch-800-600-2.jpg		\|image2=4.2 inch-800-600-2.jpg
	\|intro=~~Display expansion board demo page for microcontroller teaching and interactive prototyping~~, ~~integrating screen~~, ~~buttons~~, ~~and expansion interfaces.(Standalone product 4)~~		\|intro=Photo, ESP32, JD79668, SPI
	\|highlights=* Expansion board ~~form factor for direct stacking~~ on ~~common controller boards~~.		\|highlights=1.The 4.2 inch Photo Board(4C) is an open-source 4-color E-Paper development board based on the ESP32-WROOM-32E MCU. It carries an onboard 4.2-inch black / white / red / yellow E-Paper display at 400×300 resolution, suitable for desktop photo frames,dynamic labels, low-power information displays, and similar applications.
	* Suitable for ~~dashboards~~, ~~menus~~, and ~~sensor data display~~.
	* Example parameters and ~~steps maintainable via admin form~~.		2. Designed for makers, educators, and secondary developers, the board integrates a USB-C port, CH340C USB-to-serial bridge, TF card slot, three physical buttons, dual I/O expansion headers, plus the BOOT and RST buttons — flashing and debugging require no extra tools.
	* Standalone product ID: 4.
			3. The companion sketch is built on the Arduino framework and provides a full photo-album manager plus a web configuration UI: upload an image through the browser and the board displays it. Auto-switching follows a configurable timer, with TF card mirror backup and one-click clear-all.
	\|hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.		\|hardware=The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.
	\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]		\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]

← Older revision		Revision as of 00:13, 17 September 2026
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	{{!}}<div>Schematics, firmware source code and Web UI are all open;secondary development is supported</div>		{{!}}<div>Schematics, firmware source code and Web UI are all open;secondary development is supported</div>
	{{!}}}		{{!}}}
	\|hardware=== <span style="color: rgb(52, 176, 176);">1.1 Connect Power</span> ==		\|hardware==== <span style="color: rgb(52, 176, 176);">1.1 Connect Power</span> ===
	Use a standard USB-C data cable to connect the board to a computer or charger. On power-up the screen shows the 4-color hint image.		Use a standard USB-C data cable to connect the board to a computer or charger. On power-up the screen shows the 4-color hint image.

	== <span style="color: rgb(52, 176, 176);">1.2 Connect to the Board</span> ==		=== <span style="color: rgb(52, 176, 176);">1.2 Connect to the Board</span> ===
	The board starts Wi-Fi in AP mode by default:		The board starts Wi-Fi in AP mode by default:

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	After connecting a phone or computer to this hotspot, open the browser at <nowiki>http://192.168.4.1</nowiki> to enter the configuration page.		After connecting a phone or computer to this hotspot, open the browser at <nowiki>http://192.168.4.1</nowiki> to enter the configuration page.

	== <span style="color: rgb(52, 176, 176);">1.3 Switch to STA Mode</span> ==		=== <span style="color: rgb(52, 176, 176);">1.3 Switch to STA Mode</span> ===
	To make the board join your home router directly, fill in the SSID and password under the Settings card of the Web UI and save. The board reboots and joins the router in STA mode. Open the browser at the IP it obtained from the router to access it on your local network (recommended for advanced users).		To make the board join your home router directly, fill in the SSID and password under the Settings card of the Web UI and save. The board reboots and joins the router in STA mode. Open the browser at the IP it obtained from the router to access it on your local network (recommended for advanced users).

	== <span style="color: rgb(52, 176, 176);">1.4 Upload Your First Photo</span> ==		=== <span style="color: rgb(52, 176, 176);">1.4 Upload Your First Photo</span> ===
	(1). Open <nowiki>http://192.168.4.1</nowiki> (AP mode) or the board's LAN IP.		(1). Open <nowiki>http://192.168.4.1</nowiki> (AP mode) or the board's LAN IP.

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	\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]		\|usage=[[File:4.2 inch-600-300-4.jpg\|center\|thumb\|600x600px]]
	[[File:4.2 inch-800-600-3.jpg\|center\|thumb\|800x800px]]		[[File:4.2 inch-800-600-3.jpg\|center\|thumb\|800x800px]]
	\|faq=== <span style="color: rgb(52, 176, 176);">Q1:Screen shows nothing after flashing?</span> ==		\|faq==== <span style="color: rgb(52, 176, 176);">Q1:Screen shows nothing after flashing?</span> ===
	Check that the FPC 24P cable is firmly seated and oriented correctly (typically metal side up); make sure the supply is stable (recommend a 5 V / 1 A or better USB-C source).		Check that the FPC 24P cable is firmly seated and oriented correctly (typically metal side up); make sure the supply is stable (recommend a 5 V / 1 A or better USB-C source).

	== <span style="color: rgb(52, 176, 176);">Q2:Cannot find the USB-SERIAL CH340 port?</span> ==		=== <span style="color: rgb(52, 176, 176);">Q2:Cannot find the USB-SERIAL CH340 port?</span> ===
	Try a different data cable (some cheap cables only charge); install the CH340 driver manually under Windows; hold BOOT while powering on to force the ESP32 into download mode.		Try a different data cable (some cheap cables only charge); install the CH340 driver manually under Windows; hold BOOT while powering on to force the ESP32 into download mode.

	== <span style="color: rgb(52, 176, 176);">Q3:Web page won't open (192.168.4.1 no response)?</span> ==		=== <span style="color: rgb(52, 176, 176);">Q3:Web page won't open (192.168.4.1 no response)?</span> ===
	Confirm the phone / computer has joined the board's AP hotspot (SSID: ePaperDisplay).Some phones conflict with mobile data — temporarily disable mobile data, or wait a few seconds after connecting.		Confirm the phone / computer has joined the board's AP hotspot (SSID: ePaperDisplay).Some phones conflict with mobile data — temporarily disable mobile data, or wait a few seconds after connecting.

	== <span style="color: rgb(52, 176, 176);">Q4:Screen doesn't update after upload?</span> ==		=== <span style="color: rgb(52, 176, 176);">Q4:Screen doesn't update after upload?</span> ===
	A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.		A full E-Paper refresh takes ~21 s — that's normal. If nothing changes after 30 s, press RST to reboot.
	\|dl1Type=Demo		\|dl1Type=Demo