gdey073d46 800x480 7 color

• Size: 800 * 480 7.3" Black/Red/Yellow/Blue/Green/Orange (7 colors considering white)
• Controller: SPD1656 (Not 100% sure if it's this one but acts same as anothers I already had implemented for this controller)
• Status: Implemented and available on branch 66/gdey073d46 (Tested and working)
• Refresh time: 32 seconds
• Partial update: Not supported as in most of the color epapers.
• Important: Unless you use ESP32S3 or a MCU with more RAM please place the buffer into PSRAM on ESP32. Otherwise there will be no DRAM available to build the Firmware. Check comments about it on gdey073d46.h

Buy this 7 color ACEP epaper here

DEMOS available in this repository

1. cale-7-color.cpp -> Using CALE.es you can just add a 800*480 screen and use 4 or 24 bit-depth BMP output to download a WiFi image Using idf.py menuconfig you need to previously set the WiFi configuration and your bmp cale URL

2. demo-7-colors.cpp will just print some random color squares and some text.

Statistics

STATS (ms)
4358 _wakeUp settings+send Buffer
2027 _powerOn
6385 total time in millis

Additional specifications

Note that this epapers are good to make a colorful sign for a store but they are not perfect for rendering full quality photos. Still they will make a nice and surprising good enough photo-portrait with their limited colors if you use a good dithering. That's why we recommend to try CALE.es since it has different dithering options using Image Magick included.

Implementation example

#include <gdey073d46.h>
EpdSpi io;
gdey073d46 display(io);

uint16_t randomColor() {
  srand(esp_timer_get_time());
  uint8_t random = rand()%5;
  uint16_t color = 0x33;
  switch (random)
  {
  case 0:
     color = EPD_GREEN;
     break;
  
  case 1:
     color = EPD_RED;
     break;
  case 2:
     color = EPD_ORANGE;
     break;
  case 3:
     color = EPD_YELLOW;
     break;
  case 4:
     color = EPD_BLUE;
     break;
  case 5:
     color = EPD_BLACK;
     break;
  }
  return color;
}

void app_main() {
   // Test Epd class. true to enable debug
   display.init(false);
   display.fillScreen(randomColor());
   display.update();
}