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libraries/GxEPD2/extras/tests/GxEPD2_MinimumExample/GxEPD2_MinimumExample.ino

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+// GxEPD2_MinimumExample.ino by Jean-Marc Zingg
+
+// purpose is e.g. to determine minimum code and ram use by this library
+
+// see GxEPD2_wiring_examples.h of GxEPD2_Example for wiring suggestions and examples
+// if you use a different wiring, you need to adapt the constructor parameters!
+
+// uncomment next line to use class GFX of library GFX_Root instead of Adafruit_GFX, to use less code and ram
+//#include <GFX.h>
+
+#include <GxEPD2_BW.h> // including both doesn't use more code or ram
+#include <GxEPD2_3C.h> // including both doesn't use more code or ram
+#include <GxEPD2_7C.h> // same for all three
+
+// select the display class and display driver class in the following file (new style):
+#include "GxEPD2_display_selection_new_style.h"
+
+// alternately you can copy the constructor from GxEPD2_display_selection.h or GxEPD2_display_selection_added.h of GxEPD2_Example to here
+// e.g. for Wemos D1 mini:
+//GxEPD2_BW<GxEPD2_154_D67, GxEPD2_154_D67::HEIGHT> display(GxEPD2_154_D67(/*CS=D8*/ SS, /*DC=D3*/ 0, /*RST=D4*/ 2, /*BUSY=D2*/ 4)); // GDEH0154D67
+
+void setup()
+{
+  //display.init(115200); // default 10ms reset pulse, e.g. for bare panels with DESPI-C02
+  display.init(115200, true, 2, false); // USE THIS for Waveshare boards with "clever" reset circuit, 2ms reset pulse
+  // comment out next line to have no or minimal Adafruit_GFX code
+  display.setTextColor(GxEPD_BLACK);
+  display.firstPage();
+  do
+  {
+    display.fillScreen(GxEPD_WHITE);
+    // comment out next line to have no or minimal Adafruit_GFX code
+    display.print("Hello World!");
+  }
+  while (display.nextPage());
+}
+
+void loop() {};