Hi, I am totally digging this project and am eager to try my hand at building one.

Being an absolute hack when it comes to PCB software, would it be possible for you to create some Gerber files of your PCB design? I tried plotting it from KiCAD, but I wasn't getting copper layers that JLCPCB recognized.

I ordered a amount of 10 PCBs because one piece is obviously not worth it. So I can share the remaining 9 PCBs if you cover my basics costs.

I'll send you one PCB each by postal mail without warranty it will arrive the destination. 2€ + postage fee. One mail is less than 40g. Payment via Paypal.

Please contact me if you desire a brand new green PCB for the macro keyboard project.

btw: I have very good experience with JLCPCB from China - no advertisement but this was not my fist order and price/quality is very good.

Is there any chance I could get an example of a full image refresh and a partial image refresh?

I am a bit confused and trying to get something usable going in golang, but I need an example of how to flash the whole screen and a partial update. What it would look like in raw serial data would be very useful.

Like a simple example of writing a centered glyph or word, and the steps to draw it :pray:

I run windows 10, and it seems it's not quite working as expected. I first ran into an issue where win32gui wasn't available, and resolved that by installing pip install pywin32

Then I tried launching it, but next it failed at a pulse audio import in modes.py. Which from what I understand should only be available in linux.

Traceback (most recent call last):
  File "./controller.py", line 9, in <module>
    from modes import *          #Definitions of the hotkey functions in different "modes"
  File "C:\Users\Rudi\Documents\Github\inkkeys\python-controller\modes.py", line 23, in <module>
    import pulsectl                                  # Get volume level in Linux, pip3 install pulsectl
  File "C:\Users\Rudi\AppData\Local\Programs\Python\Python37\lib\site-packages\pulsectl\__init__.py", line 4, in <module>
    from . import _pulsectl
  File "C:\Users\Rudi\AppData\Local\Programs\Python\Python37\lib\site-packages\pulsectl\_pulsectl.py", line 684, in <module>
    pa = LibPulse()
  File "C:\Users\Rudi\AppData\Local\Programs\Python\Python37\lib\site-packages\pulsectl\_pulsectl.py", line 636, in __init__
    p = CDLL(ctypes.util.find_library('libpulse') or 'libpulse.so.0')
  File "C:\Users\Rudi\AppData\Local\Programs\Python\Python37\lib\ctypes\__init__.py", line 356, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] The specified module could not be found

I then commented out the pulse audio import which got me to where I am now.

My device is COM20, and when I start it, it does this:

https://there.oughta.be/a/macro-keyboard
I will try to stay connected. Press Ctrl+c to quit.
Connecting to  COM20 .
Requesting device info...
Header found. Waiting for infos...
End of info received.
Testmode:  False
Number of LEDs:  10
Display width:  128
Display height:  296
Rotation circle steps:  20
Connected to  COM20 .
Error:  <class 'AttributeError'>
I will retry in three seconds...
Connecting to  COM20 .
Serial error:  could not open port 'COM20': PermissionError(13, 'Access is denied.', None, 5)
I will retry in three seconds...
Connecting to  COM20 .
Serial error:  could not open port 'COM20': PermissionError(13, 'Access is denied.', None, 5)
I will retry in three seconds...
Connecting to  COM20 .
Serial error:  could not open port 'COM20': PermissionError(13, 'Access is denied.', None, 5)
I will retry in three seconds...
Connecting to  COM20 .
Serial error:  could not open port 'COM20': PermissionError(13, 'Access is denied.', None, 5)
I will retry in three seconds...
Connecting to  COM20 .

Any advice / suggestions would be welcome.

Hi,

I am trying to build this cool keypad. I got most of the stuff working okay, but I failed at keycaps: I managed to print them in PETG without issues, but they do not fit. The cross-shaped hole is too small (using typical Gateron switches).

I would like to fix this, but I need some source 3d model to work with. I do not have Blender nor KiCad (never used these). I am experienced with OpenSCAD and I suppose I can learn some other CAD tools as well, provided I can get the source model.

The documentation states that 3d models were taken from a KiCad component library. Can you please provide some more specific instructions/links for that?

Thanks, Ondrej Zara

I am curious what these resistors are used for, mind sharing some insight? I may or may not be busy with a variation of the board, and I can't say I have played with an encoder wheel before to understand why it's needed.

I get this error when I try to run the python script:

Connecting to  /dev/ttyACM2 .
Requesting device info...
Sending: I
Received: Inkkeys
Header found. Waiting for infos...
Received: TEST 0
Received: N_LED 12
Received: DISP_W 128
Received: DISP_H 296
Received: ROT_CIRCLE_STEPS 20
Received: Done
End of info received.
Testmode:  False
Number of LEDs:  12
Display width:  128
Display height:  296
Rotation circle steps:  20
Connected to  /dev/ttyACM2 .
Active window: Navigator
Traceback (most recent call last):
  File "/home/marius/Downloads/inkkeys-main/python-controller/controller.py", line 110, in tryUsingPort
    work()  #Success, enter main loop
  File "/home/marius/Downloads/inkkeys-main/python-controller/controller.py", line 78, in work
    mode.activate(device)       # ...and call its activate function
  File "/home/marius/Downloads/inkkeys-main/python-controller/modes.py", line 206, in activate
    device.sendTextFor("title", "Default", inverted=True) #Title
  File "/home/marius/Downloads/inkkeys-main/python-controller/inkkeys/device.py", line 207, in sendTextFor
    font1 = ImageFont.truetype("font/Munro.ttf", 10)
  File "/usr/lib/python3.10/site-packages/PIL/ImageFont.py", line 976, in truetype
    return freetype(font)
  File "/usr/lib/python3.10/site-packages/PIL/ImageFont.py", line 973, in freetype
    return FreeTypeFont(font, size, index, encoding, layout_engine)
  File "/usr/lib/python3.10/site-packages/PIL/ImageFont.py", line 249, in __init__
    self.font = core.getfont(
OSError: cannot open resource

Error:  <class 'OSError'>
I will retry in three seconds...

The error changes when terminal is in focus:

Connecting to  /dev/ttyACM2 .
Requesting device info...
Sending: I
Received: Inkkeys
Header found. Waiting for infos...
Received: TEST 0
Received: N_LED 12
Received: DISP_W 128
Received: DISP_H 296
Received: ROT_CIRCLE_STEPS 20
Received: Done
End of info received.
Testmode:  False
Number of LEDs:  12
Display width:  128
Display height:  296
Rotation circle steps:  20
Connected to  /dev/ttyACM2 .
Could not get active window:  <class 'Xlib.error.BadWindow'>
Traceback (most recent call last):
  File "/home/marius/Downloads/inkkeys-main/python-controller/controller.py", line 110, in tryUsingPort
    work()  #Success, enter main loop
  File "/home/marius/Downloads/inkkeys-main/python-controller/controller.py", line 72, in work
    if ("process" in i and i["process"] in processes) or ("activeWindow" in i and i["activeWindow"].match(activeWindow)) or not ("process" in i or "activeWindow" in i):
UnboundLocalError: local variable 'activeWindow' referenced before assignment

Error:  <class 'UnboundLocalError'>
I will retry in three seconds...

I had it working few times so I'm not sure what might be causing this error, it seemingly appears out of nowhere. Any idea what might be causing this?

I've got the device programmed and working on Windows 10, but haven't been able to get the display to perform a partial refresh at any point. I have the v2 of the display and have made the changes to the Arduino code as specified in the readme.

Not sure what the intended behaviour is, but the hardware demo file does display a static image, and then clears.

In the python controller however the functionality of the different keys is working, but the only time I can get an image on the screen is by pressing button 8 to toggle the demo display. I realised that this function makes a call to updateDisplay with fullRefresh=True, so I made that the default in the updateDisplay function and now all the screens display correctly, but only after a lengthy full refresh.

Has anyone else encountered this issue? Or any suggestions for what to try to resolve it? If any additional info would be useful to identify the issue let me know and I'll try to provide it ASAP.

Hey gang - I'm getting this set up on my Windows 11 pc running Python 3.9. Initially I found that I was missing the pulsectl dependency but, after installing via pip, I now get this error:

FileNotFoundError: Could not find module 'libpulse.so.0' (or one of its dependencies). Try using the full path with constructor syntax.

As far as I can tell, libpulse is part of pulsectl so I don't know what else to try. Hoping you guys might know whats up. Thanks!

Hi! Thanks for making this great project. I will build 6 of the keyboards to help control a radio amateur station.

On a Mac OS, Monterey 12.1 I have a problem with using AppKit. It is installed with pip3 so the OS should be ready.

when processchecks.py is with capital letters like: from AppKit import NSWorkspace

it doesn't find the AppKit. If I change it to small caps: from appkit import NSWorkspace

it finds the Appkit but doesn't find NSWorkspace with error: Traceback (most recent call last): File "/Users/simon/Downloads/inkkeys/python-controller/controller.py", line 7, in from processchecks import * #Functions to check for active processes and windows File "/Users/simon/Downloads/inkkeys/python-controller/processchecks.py", line 13, in from appkit import NSWorkspace ImportError: cannot import name 'NSWorkspace' from 'appkit' (/usr/local/lib/python3.9/site-packages/appkit/init.py)

Any idea and help please?

Hi,

I have 4 more PCBs here that I don't need, they are quite pretty with black solder mask and white silkscreen. Price £4 + postage (should be cheap, fits in letter)

I keep getting this error when I try to complie the code. Any ideas how to fix thsi?

In file included from c:\users\boss\documents\arduino\libraries\hid-project\src\hid-apis\KeyboardAPI.h:29:0,
                 from c:\users\boss\documents\arduino\libraries\hid-project\src\hid-apis\defaultkeyboardapi.h:27,
                 from C:\Users\BOSS\Documents\Arduino\libraries\HID-Project\src/SingleReport/BootKeyboard.h:30,
                 from C:\Users\BOSS\Documents\Arduino\libraries\HID-Project\src/HID-Project.h:50,
                 from C:\Users\BOSS\Downloads\inkkeys-main(1)\inkkeys-main\arduino\inkkeys\inkkeys.ino:13:
c:\users\boss\documents\arduino\libraries\hid-project\src\keyboardlayouts\improvedkeylayouts.h:54:21: note: #pragma message: Using default ASCII layout for keyboard modules
     #pragma message "Using default ASCII layout for keyboard modules"
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\BOSS\Downloads\inkkeys-main(1)\inkkeys-main\arduino\inkkeys\inkkeys.ino:15:0:
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:79:1: error: expected class-name before '{' token
 {
 ^
In file included from C:\Users\BOSS\Downloads\inkkeys-main(1)\inkkeys-main\arduino\inkkeys\inkkeys.ino:15:0:
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In constructor 'GxEPD2_BW<GxEPD2_Type, page_height>::GxEPD2_BW(GxEPD2_Type)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:30:31: error: class 'GxEPD2_BW<GxEPD2_Type, page_height>' does not have any field named 'Adafruit_GFX'
 #define GxEPD2_GFX_BASE_CLASS Adafruit_GFX
                               ^
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:85:44: note: in expansion of macro 'GxEPD2_GFX_BASE_CLASS'
     GxEPD2_BW(GxEPD2_Type epd2_instance) : GxEPD2_GFX_BASE_CLASS(GxEPD2_Type::WIDTH, GxEPD2_Type::HEIGHT), epd2(epd2_instance)
                                            ^~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\BOSS\Downloads\inkkeys-main(1)\inkkeys-main\arduino\inkkeys\inkkeys.ino:15:0:
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:89:17: error: 'HEIGHT' was not declared in this scope
       _pages = (HEIGHT / _page_height) + ((HEIGHT % _page_height) > 0);
                 ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:89:17: note: suggested alternative: 'HIGH'
       _pages = (HEIGHT / _page_height) + ((HEIGHT % _page_height) > 0);
                 ^~~~~~
                 HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::drawPixel(int16_t, int16_t, uint16_t)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:122:15: error: 'WIDTH' was not declared in this scope
           x = WIDTH - x - 1;
               ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:126:15: error: 'HEIGHT' was not declared in this scope
           y = HEIGHT - y - 1;
               ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:126:15: note: suggested alternative: 'HIGH'
           y = HEIGHT - y - 1;
               ^~~~~~
               HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::display(bool)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:196:63: error: 'WIDTH' was not declared in this scope
       if (partial_update_mode) epd2.writeImage(_buffer, 0, 0, WIDTH, _page_height);
                                                               ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:197:57: error: 'WIDTH' was not declared in this scope
       else epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, _page_height);
                                                         ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:201:45: error: 'WIDTH' was not declared in this scope
         epd2.writeImageAgain(_buffer, 0, 0, WIDTH, _page_height);
                                             ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::displayWindow(uint16_t, uint16_t, uint16_t, uint16_t)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:219:36: error: 'HEIGHT' was not declared in this scope
       uint16_t y_part = _reverse ? HEIGHT - h - y : y;
                                    ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:219:36: note: suggested alternative: 'HIGH'
       uint16_t y_part = _reverse ? HEIGHT - h - y : y;
                                    ^~~~~~
                                    HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:220:47: error: 'WIDTH' was not declared in this scope
       epd2.writeImagePart(_buffer, x, y_part, WIDTH, _page_height, x, y, w, h);
                                               ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::setFullWindow()':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:233:15: error: 'WIDTH' was not declared in this scope
       _pw_w = WIDTH;
               ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:234:15: error: 'HEIGHT' was not declared in this scope
       _pw_h = HEIGHT;
               ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:234:15: note: suggested alternative: 'HIGH'
       _pw_h = HEIGHT;
               ^~~~~~
               HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'bool GxEPD2_BW<GxEPD2_Type, page_height>::nextPage()':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:269:41: error: 'HEIGHT' was not declared in this scope
           uint32_t offset = _reverse ? (HEIGHT - _pw_h) * _pw_w / 8 : 0;
                                         ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:269:41: note: suggested alternative: 'HIGH'
           uint32_t offset = _reverse ? (HEIGHT - _pw_h) * _pw_w / 8 : 0;
                                         ^~~~~~
                                         HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:280:56: error: 'WIDTH' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                        ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:280:63: error: 'HEIGHT' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                               ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:280:63: note: suggested alternative: 'HIGH'
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                               ^~~~~~
                                                               HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:296:91: error: 'HEIGHT' was not declared in this scope
         uint16_t page_ye = _current_page < int16_t(_pages - 1) ? page_ys + _page_height : HEIGHT;
                                                                                           ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:296:91: note: suggested alternative: 'HIGH'
         uint16_t page_ye = _current_page < int16_t(_pages - 1) ? page_ys + _page_height : HEIGHT;
                                                                                           ^~~~~~
                                                                                           HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:334:80: error: 'WIDTH' was not declared in this scope
         if (!_second_phase) epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:334:115: error: 'HEIGHT' was not declared in this scope
         if (!_second_phase) epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                                                   ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:334:115: note: suggested alternative: 'HIGH'
         if (!_second_phase) epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                                                   ^~~~~~
                                                                                                                   HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:335:56: error: 'WIDTH' was not declared in this scope
         else epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                        ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:335:91: error: 'HEIGHT' was not declared in this scope
         else epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                           ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:335:91: note: suggested alternative: 'HIGH'
         else epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                           ^~~~~~
                                                                                           HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::drawPaged(void (*)(const void*), const void*)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:368:41: error: 'HEIGHT' was not declared in this scope
           uint32_t offset = _reverse ? (HEIGHT - _pw_h) * _pw_w / 8 : 0;
                                         ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:368:41: note: suggested alternative: 'HIGH'
           uint32_t offset = _reverse ? (HEIGHT - _pw_h) * _pw_w / 8 : 0;
                                         ^~~~~~
                                         HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:379:56: error: 'WIDTH' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                        ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:379:63: error: 'HEIGHT' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                               ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:379:63: note: suggested alternative: 'HIGH'
           epd2.writeImageForFullRefresh(_buffer, 0, 0, WIDTH, HEIGHT);
                                                               ^~~~~~
                                                               HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:397:88: error: 'HEIGHT' was not declared in this scope
             uint16_t page_ye = _current_page < (_pages - 1) ? page_ys + _page_height : HEIGHT;
                                                                                        ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:397:88: note: suggested alternative: 'HIGH'
             uint16_t page_ye = _current_page < (_pages - 1) ? page_ys + _page_height : HEIGHT;
                                                                                        ^~~~~~
                                                                                        HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:421:62: error: 'WIDTH' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                              ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:421:97: error: 'HEIGHT' was not declared in this scope
           epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                                 ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:421:97: note: suggested alternative: 'HIGH'
           epd2.writeImageForFullRefresh(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                                 ^~~~~~
                                                                                                 HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:432:55: error: 'WIDTH' was not declared in this scope
             epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                       ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:432:90: error: 'HEIGHT' was not declared in this scope
             epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                          ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:432:90: note: suggested alternative: 'HIGH'
             epd2.writeImageAgain(_buffer, 0, page_ys, WIDTH, gx_uint16_min(_page_height, HEIGHT - page_ys));
                                                                                          ^~~~~~
                                                                                          HIGH
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h: In member function 'void GxEPD2_BW<GxEPD2_Type, page_height>::_rotate(uint16_t&, uint16_t&, uint16_t&, uint16_t&)':
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:584:15: error: 'WIDTH' was not declared in this scope
           x = WIDTH - x - w;
               ^~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:588:15: error: 'HEIGHT' was not declared in this scope
           y = HEIGHT - y - h;
               ^~~~~~
C:\Users\BOSS\Documents\Arduino\libraries\GxEPD2\src/GxEPD2_BW.h:588:15: note: suggested alternative: 'HIGH'
           y = HEIGHT - y - h;
               ^~~~~~
               HIGH

exit status 1

Compilation error: exit status 1

Hi,

I built the whole keypad, but I am starting to think that my e-ink display is not supporting partial updates. I am opening this issue to organize my thoughts and seek advice.

I have a second revision of the display, so I adjusted the wiring, constants (settings.h) and constructor (GxEPD2_290_T94) according to https://www.reddit.com/r/arduino/comments/l4wxxf/the_hardware_is_assembled_and_passed_all_tests/gqovq1j. I did this both in the hardware-test sketch as well as the main inkkeys sketch.

I tried:

1. the hardware test sketch. This one works flawlessly, shows circle patterns. I am not sure whether this uses partial updates or not.

2. the regular inkkeys sketch. The serial protocol works. I launched the python script and loaded the ModeGimp() mode. The display remained blank/white. Keys are working according to the Gimp mode.

3. I then connected to the keypad via serial and issues the R f command. Magically, everything (icons) appeared on screen.

To further debug the issue, I restarted the keypad, did nothing Python-related, opened the serial terminal and issued:

D 50 50 8 2 <enter>
AA <enter>
R f <enter>

This worked: two small rows with several black bits appeared. However, when I did the same with partial refresh, nothing appeared:

D 50 50 8 2 <enter>
AA <enter>
R p <enter>

Finally, once I issued R f, everything that has been previously sent (and failed to partially update) appeared.

This is what I bought: https://www.aliexpress.com/item/32811510579.html

Do you think this can be solved software-wise? Or shall I contact the seller? I would be happy for any comments/suggestions.

I think it could be nice to support low-profile keys as well. Their pins are aligned slightly differently, and I think you have both footprints on the same layer and just bridge the pins :grimacing:

I will take a photo a bit later to show the difference, and maybe try my hand at updating it.

I ordered 5 boards from PCBway and I am super happy that they came out really great. But one of the issues I was having is definitely the pin spacing of the LEDs, it's quite a pain. I think most people would be happy to print a 3mm or so ring spacer and rather use 2.54mm pitch, with the legs slightly bent. I kinda trashed ~~one of my boards~~ two of my boards just because of that issue.

This raised something else, which may need improvement. The ground plane is massive :scream:, my poor little soldering iron could not heat it fast enough to use a wick as suggested to clear out excess solder. It's fairly bad to heat an LED for so long, and the chances of damaging it are fairly high.

I wonder if the ground plane could have an isolation ring around the circuit to reduce the ground plane, and make it easier to heat up. Basically, all the heat is transferring into that entire PCB plane at the moment.

Not so much as an issue, but a quality of life on both