1.54-inch E-paper Display - Revision history

Ows wiki: /* Code Wi-Fi */

2025-12-18T23:22:43Z

‎Code Wi-Fi

144.2.107.134 at 22:44, 18 December 2025

2025-12-18T22:44:08Z

144.2.107.134: /* [Code 2 Display a clock - WIFI v2] */

2025-12-12T22:56:44Z

‎[Code 2 Display a clock - WIFI v2]

144.2.107.134: /* [Code 2 Display a clock - WIFI] */

2025-12-12T22:55:34Z

‎[Code 2 Display a clock - WIFI]

144.2.107.134: /* Support */

2025-12-12T21:43:17Z

‎Support

144.2.107.134: /* Support */

2025-12-12T21:43:01Z

‎Support

144.2.107.134: /* Support */

2025-12-12T21:42:33Z

‎Support

Ows wiki: /* [Code 2 Display a clock] */

2025-12-12T20:30:08Z

‎[Code 2 Display a clock]

Ows wiki: /* [Code 2] */

2025-12-12T18:23:22Z

‎[Code 2]

Ows wiki: /* [Code 2] */

2025-12-12T18:22:57Z

‎[Code 2]

@@ Line 52: / Line 52: @@
 === Code Wi-Fi ===
-dd
+[[Wi-Fi-ESP32-E-Paper| Wi-Fi-ESP32-E-Paper]]<br>
 === [Code 1] Display a bitmap image ===

@@ Line 49: / Line 49: @@
 HelloWorld: <br>
 Shape: Display different sizes of words and shape randomly.<br>
 === [Code 1] Display a bitmap image ===

@@ Line 747: / Line 747: @@
        String(timeinfo.tm_mon+1) + "/" +
        String(timeinfo.tm_year+1900),
-       epaper.width()/2, 30, 4   // police taille 2
+       epaper.width()/2, 30, 4   // police taille 2 -> 4
      );
@@ Line 754: / Line 754: @@
      sprintf(buffer, "%02d:%02d", timeinfo.tm_hour, timeinfo.tm_min);
      epaper.setTextDatum(MC_DATUM); // Centrage horizontal + vertical (Middle Center)
-     epaper.drawString(buffer, epaper.width()/2, epaper.height()/2, 7); // police taille 6
+     epaper.drawString(buffer, epaper.width()/2, epaper.height()/2, 7); // police taille 6 -> 7
      epaper.update(); // Mise à jour écran

@@ Line 665: / Line 665: @@
    delay(1000); // Boucle chaque seconde mais rafraîchit seulement à chaque minute
+}
 </pre>

@@ Line 8: / Line 8: @@
 <b>Setup</b>
-  Install Seeed <b>GFX Library</b><br>
+  Install Seeed <b>GFX Library</b>
   https://github.com/Seeed-Studio/Seeed_GFX

@@ Line 9: / Line 9: @@
 Install Seeed <b>GFX Library</b><br>
-https://seeed-studio.github.io/Seeed_GFX/
+https://github.com/Seeed-Studio/Seeed_GFX
 This library has same function as TFT library and no compatible with it. If you have installed TFT library or other similary display libraries, please uninstall it first.

@@ Line 590: / Line 590: @@
 #define BOARD_SCREEN_COMBO 505 // 1.54 inch monochrome ePaper Screen （SSD1681）
 #define USE_XIAO_EPAPER_BREAKOUT_BOARD
 </pre>

@@ Line 445: / Line 445: @@
 </pre>
-=== [Code 2] ===
+=== [Code 2 Display a clock] ===
 <pre>

← Older revision		Revision as of 18:22, 12 December 2025
Line 446:		Line 446:

	=== [Code 2] ===		=== [Code 2] ===
		+
		+	<pre>
		+	/*
		+	An example digital clock using a TFT LCD screen to show the time.
		+	Demonstrates use of the font printing routines. (Time updates but date does not.)
		+
		+	For a more accurate clock, it would be better to use the RTClib library.
		+	But this is just a demo.
		+
		+	This examples uses the hardware SPI only. Non-hardware SPI
		+	is just too slow (~8 times slower!)
		+
		+	Based on clock sketch by Gilchrist 6/2/2014 1.0
		+	Updated by Bodmer
		+	A few colour codes:
		+
		+	code color
		+	0x0000 Black
		+	0xFFFF White
		+	0xBDF7 Light Gray
		+	0x7BEF Dark Gray
		+	0xF800 Red
		+	0xFFE0 Yellow
		+	0xFBE0 Orange
		+	0x79E0 Brown
		+	0x7E0 Green
		+	0x7FF Cyan
		+	0x1F Blue
		+	0xF81F Pink
		+
		+	*/
		+	#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
		+	#include <SPI.h>
		+
		+	#ifdef EPAPER_ENABLE // Only compile this code if the EPAPER_ENABLE is defined in User_Setup.h
		+
		+	EPaper epaper = EPaper(); // Invoke library, pins defined in User_Setup.h
		+
		+	uint32_t targetTime = 0; // for next 1 second timeout
		+
		+	byte omm = 99;
		+	bool initial = 1;
		+	byte xcolon = 0;
		+	unsigned int colour = 0;
		+
		+	static uint8_t conv2d(const char* p) {
		+	uint8_t v = 0;
		+	if ('0' <= p && p <= '9')
		+	v = *p - '0';
		+	return 10 * v + *++p - '0';
		+	}
		+
		+	uint8_t hh=conv2d(__TIME__), mm=conv2d(__TIME__+3), ss=conv2d(__TIME__+6); // Get H, M, S from compile time
		+
		+	#endif
		+
		+	void setup(void) {
		+	#ifdef EPAPER_ENABLE
		+	epaper.begin();
		+	epaper.setRotation(1);
		+	epaper.fillScreen(TFT_BLACK);
		+
		+	epaper.setTextColor(TFT_YELLOW, TFT_BLACK); // Note: the new fonts do not draw the background colour
		+	epaper.update(); // update the display
		+	targetTime = millis() + 1000;
		+	#endif
		+	}
		+
		+	void loop() {
		+	#ifdef EPAPER_ENABLE
		+	if (targetTime < millis()) {
		+	targetTime = millis()+1000;
		+	ss++; // Advance second
		+	if (ss==60) {
		+	ss=0;
		+	omm = mm;
		+	mm++; // Advance minute
		+	if(mm>59) {
		+	mm=0;
		+	hh++; // Advance hour
		+	if (hh>23) {
		+	hh=0;
		+	}
		+	}
		+	}
		+
		+	if (ss==0 \|\| initial) {
		+	initial = 0;
		+	epaper.setTextColor(TFT_GREEN, TFT_BLACK);
		+	epaper.setCursor (8, 52);
		+	epaper.print(__DATE__); // This uses the standard ADAFruit small font
		+
		+	epaper.setTextColor(TFT_BLUE, TFT_BLACK);
		+	epaper.drawCentreString("It is windy",120,48,2); // Next size up font 2
		+
		+	//epaper.setTextColor(0xF81F, TFT_BLACK); // Pink
		+	//epaper.drawCentreString("12.34",80,100,6); // Large font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 . : a p m
		+	}
		+
		+	// Update digital time
		+	byte xpos = 6;
		+	byte ypos = 0;
		+	if (omm != mm) { // Only redraw every minute to minimise flicker
		+	// Uncomment ONE of the next 2 lines, using the ghost image demonstrates text overlay as time is drawn over it
		+	epaper.setTextColor(TFT_BLACK, TFT_BLACK); // Leave a 7 segment ghost image, comment out next line!
		+	//epaper.setTextColor(TFT_BLACK, TFT_BLACK); // Set font colour to black to wipe image
		+	// Font 7 is to show a pseudo 7 segment display.
		+	// Font 7 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 0 : .
		+	epaper.drawString("88:88",xpos,ypos,7); // Overwrite the text to clear it
		+	epaper.setTextColor(0xFBE0); // Orange
		+	omm = mm;
		+
		+	if (hh<10) xpos+= epaper.drawChar('0',xpos,ypos,7);
		+	xpos+= epaper.drawNumber(hh,xpos,ypos,7);
		+	xcolon=xpos;
		+	xpos+= epaper.drawChar(':',xpos,ypos,7);
		+	if (mm<10) xpos+= epaper.drawChar('0',xpos,ypos,7);
		+	epaper.drawNumber(mm,xpos,ypos,7);
		+	}
		+
		+	if (ss%2) { // Flash the colon
		+	epaper.setTextColor(TFT_BLACK, TFT_BLACK);
		+	xpos+= epaper.drawChar(':',xcolon,ypos,7);
		+	epaper.setTextColor(0xFBE0, TFT_BLACK);
		+	}
		+	else {
		+	epaper.drawChar(':',xcolon,ypos,7);
		+	colour = random(0xFFFF);
		+	// Erase the old text with a rectangle, the disadvantage of this method is increased display flicker
		+	epaper.fillRect (0, 64, 160, 20, TFT_BLACK);
		+	epaper.setTextColor(TFT_WHITE);
		+	}
		+	epaper.update(); // update the display
		+	}
		+	#endif
		+	}
		+	</pre>
		+
		+	<b>onglet driver.h</b>
		+
		+	<pre>
		+	// driver.h file
		+	#define BOARD_SCREEN_COMBO 505 // 1.54 inch monochrome ePaper Screen （SSD1681）
		+	#define USE_XIAO_EPAPER_BREAKOUT_BOARD
		+	</pre>