Compiling instructions:

In order to compile this you need:  Arduino Libraries, ArduinoOTA, SmallRTC (GuruSR), SmallNTP (GuruSR), StableBMA (GuruSR), Olson2POSIX (GuruSR) AND Watchy (1.2.9 or greater) base.

**VERSION 1.4.1 CHANGES**

Requires Watchy base 1.2.9 or greater, as well as the above libraries.  When editing the file changes below, DO NOT COPY items that say not to, instead make the changes or copy in the changes to avoid compiler errors.

You'll need to edit 2 files:

GxEPD2_154_D67.cpp:

Insert the following code past the following:  (Note, the uint8/16_t's below can either be uint8_t or uint16_t based on GxEPD2 version, don't copy those lines.)

GxEPD2_154_D67::GxEPD2_154_D67(int8/16_t cs, int8/16_t dc, int8/16_t rst, int8/16_t busy) :
  GxEPD2_EPD(cs, dc, rst, busy, HIGH, 10000000, WIDTH, HEIGHT, panel, hasColor, hasPartialUpdate, hasFastPartialUpdate)
{
}

to read:

GxEPD2_154_D67::GxEPD2_154_D67(int8/16_t cs, int8/16_t dc, int8/16_t rst, int8/16_t busy) :  <- DO NOT COPY THIS
  GxEPD2_EPD(cs, dc, rst, busy, HIGH, 10000000, WIDTH, HEIGHT, panel, hasColor, hasPartialUpdate, hasFastPartialUpdate)  <- DO NOT COPY THIS
{  <- DO NOT COPY THIS
}  <- DO NOT COPY THIS

bool IsDark;                                    // GuruSR:  Changed for setDarkBorder
void GxEPD2_154_D67::setDarkBorder(bool Dark){  // GuruSR:  Changed for setDarkBorder
	IsDark=Dark;                                  // GuruSR:  Changed for setDarkBorder
}                                               // GuruSR:  Changed for setDarkBorder


Change the code in _initdisplay from:

void GxEPD2_154_D67::_InitDisplay()
{
  if (_hibernating) _reset();
  delay(10); // 10ms according to specs
  _writeCommand(0x12); // soft reset
  delay(10); // 10ms according to specs
  _writeCommand(0x01); // Driver output control
  _writeData(0xC7);
  _writeData(0x00);
  _writeData(0x00);
  _writeCommand(0x3C); // BorderWavefrom
  _writeData(0x05);
  _writeCommand(0x18); // Read built-in temperature sensor
  _writeData(0x80);
  _setPartialRamArea(0, 0, WIDTH, HEIGHT);
}

to:

void GxEPD2_154_D67::_InitDisplay()
{
  if (_hibernating) _reset();                               <- DO NOT COPY THIS
  delay(10); // 10ms according to specs                     <- DO NOT COPY THIS
  _writeCommand(0x12); // soft reset                        <- DO NOT COPY THIS
  delay(10); // 10ms according to specs                     <- DO NOT COPY THIS
  _writeCommand(0x01); // Driver output control             <- DO NOT COPY THIS
  _writeData(0xC7);                                         <- DO NOT COPY THIS
  _writeData(0x00);                                         <- DO NOT COPY THIS
  _writeData(0x00);                                         <- DO NOT COPY THIS
  _writeCommand(0x3C); // BorderWavefrom                    <- DO NOT COPY THIS
  _writeData(IsDark ? 0x02 : 0x05);         // GuruSR:  Changed for setDarkBorder
  _writeCommand(0x18); // Read built-in temperature sensor  <- DO NOT COPY THIS
  _writeData(0x80);                                         <- DO NOT COPY THIS
  _setPartialRamArea(0, 0, WIDTH, HEIGHT);                  <- DO NOT COPY THIS
}

Edit GxEPD2_154_D67.h to include the following after:

void hibernate(); // turns powerOff() and sets controller to deep sleep for minimum power use, ONLY if wakeable by RST (rst >= 0)

to:

void hibernate(); // turns powerOff() and sets controller to deep sleep for minimum power use, ONLY if wakeable by RST (rst >= 0)
void setDarkBorder(bool Dark);        // GuruSR:  Changed for setDarkBorder

Make a backup of these two files if you happen to update a newer version of GxEPD2.

This will allow the compilation on either Arduino or PlatformIO.