Waveshare 7.3inch e-Paper (F)

[paul179]

Hello, I'm trying to get the e-paper display Waveshare 7.3inch e-Paper (F) to work, but unfortunately I can only see the lower quarter of the display. https://www.waveshare.com/7.3inch-e-Paper-F.htm

What could be the problem?

I added the following to the Waveshare_7_5_3C.ino file

#include <GxEPD2_7C.h> and GxEPD2_7C<GxEPD2_730c_GDEY073D46, GxEPD2_730c_GDEY073D46::HEIGHT / 4> display(GxEPD2_730c_GDEY073D46(EPD_CS, EPD_DC, EPD_RST, EPD_BUSY)); // GDEY073D46 800x480 7-color, (N-FPC-001 2021.11.26) from https://github.com/ZinggJM/GxEPD2

Gruß Paul

[G6EJD]

Why have you set ‘height / 4’ the buffer should be set to half so height/2 ?

There may not be enough memory to handle 8-colours.

[paul179]

Hello, I took the value from "GxEPD2_display_selection_added.h" when i change it to 2 i get this error.

`c:/users/tinoo/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: C:\Users\tinoo\AppData\Local\Temp\arduino\sketches\681F510BD3B9E15ABDCC2161FC169940/Waveshare_7_5_3C.ino.elf section .dram0.bss will not fit in region dram0_0_seg c:/users/tinoo/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: DRAM segment data does not fit. c:/users/tinoo/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: DRAM segment data does not fit. c:/users/tinoo/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: region dram0_0_seg overflowed by 25352 bytes collect2.exe: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1`

Is my board too small?

Gruß Paul

[G6EJD]

Your out of memory, they display needs a lot to store 8 images one for each colour.

[paul179]

Hello,

I got it to work with a "Waveshare ESP32 Driver Board".

I have changed this:

#include <GxEPD2_7C.h>

GxEPD2_7C<GxEPD2_730c_GDEY073D46, GxEPD2_730c_GDEY073D46::HEIGHT / 4> display(GxEPD2_730c_GDEY073D46(EPD_CS, EPD_DC, EPD_RST, EPD_BUSY)); // GDEY073D46 800x480 7-color, (N-FPC-001 2021.11.26)

if (StartWiFi() == WL_CONNECTED && SetupTime() == true) { if ((CurrentHour >= WakeupTime && CurrentHour <= SleepTime) || DebugDisplayUpdate) { InitialiseDisplay(); // Give screen time to initialise by getting weather data! byte Attempts = 1; bool RxWeather = false, RxForecast = false; WiFiClient client; // wifi client object while ((RxWeather == false || RxForecast == false) && Attempts <= 2) { // Try up-to 2 time for Weather and Forecast data if (RxWeather == false) RxWeather = obtain_wx_data(client, "weather"); if (RxForecast == false) RxForecast = obtain_wx_data(client, "forecast"); Attempts++; } if (RxWeather && RxForecast) { // Only if received both Weather or Forecast proceed StopWiFi(); // Reduces power consumption display.setRotation(0); int16_t tbx, tby; uint16_t tbw, tbh; uint16_t x = ((display.width() - tbw) / 2) - tbx; uint16_t y = ((display.height() - tbh) / 2) - tby; display.setFullWindow(); display.firstPage(); do { display.fillScreen(GxEPD_WHITE); display.setCursor(x, y); DisplayWeather(); } while (display.nextPage()); } } }

Gruß Paul

[G6EJD]

Hello Paul,Well done and it looks good. You could change the temperature colour based on temperature from blue, to green to orange and then red, all sorts of options become available.RegardsDavid On 14 May 2023, at 17:04, paul179 @.***> wrote: Hello, I got it to work with a "Waveshare ESP32 Driver Board". I have changed this:

include

GxEPD2_7C<GxEPD2_730c_GDEY073D46, GxEPD2_730c_GDEY073D46::HEIGHT / 4> display(GxEPD2_730c_GDEY073D46(EPD_CS, EPD_DC, EPD_RST, EPD_BUSY)); // GDEY073D46 800x480 7-color, (N-FPC-001 2021.11.26) if (StartWiFi() == WL_CONNECTED && SetupTime() == true) { if ((CurrentHour >= WakeupTime && CurrentHour <= SleepTime) || DebugDisplayUpdate) { InitialiseDisplay(); // Give screen time to initialise by getting weather data! byte Attempts = 1; bool RxWeather = false, RxForecast = false; WiFiClient client; // wifi client object while ((RxWeather == false || RxForecast == false) && Attempts <= 2) { // Try up-to 2 time for Weather and Forecast data if (RxWeather == false) RxWeather = obtain_wx_data(client, "weather"); if (RxForecast == false) RxForecast = obtain_wx_data(client, "forecast"); Attempts++; } if (RxWeather && RxForecast) { // Only if received both Weather or Forecast proceed StopWiFi(); // Reduces power consumption display.setRotation(0); int16_t tbx, tby; uint16_t tbw, tbh; uint16_t x = ((display.width() - tbw) / 2) - tbx; uint16_t y = ((display.height() - tbh) / 2) - tby; display.setFullWindow(); display.firstPage(); do { display.fillScreen(GxEPD_WHITE); display.setCursor(x, y); DisplayWeather(); } while (display.nextPage()); } } }

Gruß Paul

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[paul179]

Hello, if you want you can add the code file for the Waveshare 7.3inch e-Paper (F).

https://c.gmx.net/@324822690248523891/Ko5zIBHASqmFRVYmhZPd9w

Greetings Paul