Thank you. You have assumed the correct display, sorry I should have mentioned it. It was bought direct from waveshare in the past couple of weeks. https://www.waveshare.com/product/displays/e-paper/epaper-2/2.9inch-e-paper-module.htm
I have re-instated the original 4 wire SPI soldered connector. The display has a ‘V2’ sticker on the back and is marked rev 2.1, the V2 sticker Waveshare have told me means it is b/w.
The flex connector of the b/w display has written on it (I assume you mean the flexible connector between the display and control PCB). Can send pictures if needed, just let me know:
TEST3 TEST1 TEST2 FPC-7519rev.b TEST4
I have added the adjusted code mentioned (see below). I have tried with this code change for all the four display versions without any success. Still I am not getting any response from the display.
Incidentally, the display currently has a load of static noise on teh display. It appeared during the testing. I assume that when it correctly receives a command to display text it will either partially or fully be cleared.
I could use either the b/w/y or a b/w/r one that I also bought at the same time. Though, adding more different permutations might not be helpful in eliminating the problem, so am hesitant to do so.
It blows my mind that these boards are different and that they are not labelled…
// 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
// 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, true, 2, false);
// 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() {};
