Waveshare V4 - AttributeError: module 'presentation.screens' has no attribute 'epd2in13bv4'

[kiraitachi]

I have a Waveshare v4 screen for my raspberry pi zero w. Im trying to make it work...but for some reason Im not able to load it. I get the following errors:

module 'presentation.screens' has no attribute 'epd2in13bv4'
Traceback (most recent call last):
  File "/home/kira/zero-btc-screen/config/builder.py", line 16, in bind
    package = getattr(screens, screen.lower())
AttributeError: module 'presentation.screens' has no attribute 'epd2in13bv4'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/kira/zero-btc-screen/main.py", line 60, in <module>
    main()
  File "/home/kira/zero-btc-screen/main.py", line 40, in main
    builder.bind(data_sink)
  File "/home/kira/zero-btc-screen/config/builder.py", line 27, in bind
    raise BtcConfigError(
config.builder.BtcConfigError: Cannot instantiate epd2in13bv4

What I did:

• Configuration.cfg

[base]
console_logs             : false
#logs_file                : /tmp/zero-btc-screen.log
dummy_data               : false
refresh_interval_minutes : 15
currency		 : BTC

# Enabled screens or devices
screens : [
     epd2in13bv4
#    epd2in13v2
#    epd2in13v3
#    epd2in13bv3
#    epd2in7
#    epd3in7
#    picture
#    inkyWhatRBW
  ]

# Configuration per screen
# This doesn't make any effect if screens are not enabled above
[epd2in13v2]
#mode : line
mode : candle

[epd2in13v3]
mode : candle

[epd2in13bv4]
mode: line

[epd2in13bv3]
mode  : line

[epd2in7]
mode : candle

[epd3in7]
mode  : candle

[picture]
filename : /home/pi/output.png
mode : candle

[inkyWhatRBW]
mode : candle

I have also created this file within "presentations/screens" called epd2in13bv4.py

import os

from PIL import Image, ImageDraw, ImageFont
try:
    from waveshare_epd import epd2in13b_V4
except ImportError:
    pass
from data.plot import Plot
from presentation.observer import Observer

SCREEN_HEIGHT = 122
SCREEN_WIDTH = 250

FONT_SMALL = ImageFont.truetype(
    os.path.join(os.path.dirname(__file__), os.pardir, 'Roses.ttf'), 7)
FONT_LARGE = ImageFont.truetype(
    os.path.join(os.path.dirname(__file__), os.pardir, 'PixelSplitter-Bold.ttf'), 22)

class Epd2in13bv4(Observer):

    def __init__(self, observable, mode):
        super().__init__(observable=observable)
        self.epd = epd2in13b_V4.EPD()

        self.epd.init()
        self.image_black = Image.new('1', (SCREEN_WIDTH, SCREEN_HEIGHT), 255)
        self.image_ry = Image.new('1', (SCREEN_WIDTH, SCREEN_HEIGHT), 255)
        self.draw_black = ImageDraw.Draw(self.image_black)
        self.draw_ry = ImageDraw.Draw(self.image_ry)
        self.mode = mode

    def form_image(self, prices):
        self.draw_black.rectangle((0, 0, SCREEN_WIDTH, SCREEN_HEIGHT), fill="white")
        screen_draw = self.draw_black
        if self.mode == "candle":
            Plot.candle(prices, size=(SCREEN_WIDTH - 38, 79), position=(35, 0), draw=screen_draw)
        else:
            last_prices = [x[3] for x in prices]
            Plot.line(last_prices, size=(SCREEN_WIDTH - 36, 79), position=(36, 0), draw=screen_draw)

        flatten_prices = [item for sublist in prices for item in sublist]
        Plot.y_axis_labels(flatten_prices, FONT_SMALL, (0, 0), (32, 76), draw=screen_draw)
        screen_draw.line([(9, 83), (204, 83)])
        screen_draw.line([(33, 3), (33, 80)])
        screen_draw.line([(51, 87), (51, 101)])
        Plot.caption(flatten_prices[len(flatten_prices) - 1], 81, SCREEN_WIDTH, FONT_LARGE, screen_draw)

    def update(self, data):
        self.form_image(data)
        image_black_rotated = self.image_black.rotate(180)
        image_ry_rotated = self.image_ry.rotate(180)
        self.epd.display(
            self.epd.getbuffer(image_black_rotated),
            self.epd.getbuffer(image_ry_rotated)
        )

    def close(self):
        self.epd.Dev_exit()

Wondering if you could maybe hint me where is the issue as Im not able to pinpoint why the screen is not loading. I would appreciate it a lot. Im looking to "rework" your code once the screen is working for the BTC tracker to make an Euribor Tracker for mortgages.

Again thanks for your time and work. I appreciate you shared this.

Cheers!

[kiraitachi]

Just as a note, the screen does work perfectly fine running the demo ./EPD mentioned in the Waveshare v4 site.

[kiraitachi]

For anyone reading this, I was able to fix it by checking the configs done by this fork:

https://github.com/SatoshiNakamotoUY/PiZero-Crypto-Screen