It works like a charm now :)

Merged two projects and allowed them to use common functions for 
inter-operativity.

clock/api/__init__.py

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+# Placeholder

clock/api/clouds.pbm

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+P1
+# Cloud - non-standard p1!
+16 8
+0000000000000000
+0000001111001000
+0000001001000000
+0000010000100000
+0000010000100000
+0000001001000000
+0000001111001000
+0000000000000000

clock/api/converter.py

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+from PIL import Image, ImageDraw, ImageFont
+import numpy as np
+import datetime
+
+"""Two colors: 1 main color and 1 accent color. These are labeled in the matrix as 1 and 2"""
+
+def text_converter(text, height):
+    """Converts a text to a pixel-matrix
+    returns: np.array((16, x))"""
+
+    font = ImageFont.truetype("verdanab.ttf", height)
+    size = font.getsize(text)
+    img = Image.new("1",size,"black")
+    draw = ImageDraw.Draw(img)
+    draw.text((0, 0), text, "white", font=font)
+    pixels = np.array(img, dtype=np.uint8)
+    return pixels
+
+
+digits = {
+    1 : [[0,0,1],[0,0,1],[0,0,1],[0,0,1],[0,0,1]],
+    2 : [[1,1,1],[0,0,1],[1,1,1],[1,0,0],[1,1,1]],
+    3 : [[1,1,1],[0,0,1],[1,1,1],[0,0,1],[1,1,1]],
+    4 : [[1,0,1],[1,0,1],[1,1,1],[0,0,1],[0,0,1]],
+    5 : [[1,1,1],[1,0,0],[1,1,1],[0,0,1],[1,1,1]],
+    6 : [[1,1,1],[1,0,0],[1,1,1],[1,0,1],[1,1,1]],
+    7 : [[1,1,1],[0,0,1],[0,0,1],[0,0,1],[0,0,1]],
+    8 : [[1,1,1],[1,0,1],[1,1,1],[1,0,1],[1,1,1]],
+    9 : [[1,1,1],[1,0,1],[1,1,1],[0,0,1],[1,1,1]],
+    0 : [[1,1,1],[1,0,1],[1,0,1],[1,0,1],[1,1,1]]
+}
+
+##place of numbers, invariable
+digit_position = [[2,4], [2,10], [9,4], [9,10]]
+
+def time_converter():
+    """Converts 4-digit time to a pixel-matrix
+    returns: np.array((16, 16))"""
+    time = datetime.datetime.now().strftime("%H%M")
+    pixels = np.zeros((16,16),dtype=np.uint8)
+    time = "0" * (4 - len(str(time))) + str(time)
+    time_split = [int(i) for i in time]
+
+    for i in range(4):
+        x = digit_position[i][0]
+        y = digit_position[i][1]
+        number = digits[time_split[i]]
+        pixels[x: x + 5, y: y + 3] = np.array(number)
+
+    return pixels
+
+
+days = np.append(np.zeros((15,16)), np.array([0,1,0,1,0,1,0,1,0,1,0,1,1,0,1,1])).reshape((16,16))
+def date_converter():
+    today = datetime.datetime.today()
+    weekday = datetime.datetime.weekday(today)
+    # size of the reduced array according to weekday
+    size = [2,4,6,8,10,13,16]
+
+    pixels = days.copy() #base color background
+    lrow = np.append(pixels[15,:size[weekday]], [0 for i in range(16 - size[weekday])])
+    lrow = np.append(np.zeros((15,16)), lrow).reshape((16,16))
+    pixels += lrow
+    return pixels
+
+def weather_converter(name):
+    result = np.zeros((16,16))
+    return result
+    equiv = {
+        "clouds" : "clouds.pbm",
+        "sun" : "sun.pbm",
+        "mix" : "mix.pbm",
+        "rain" : "rain.pbm",
+        "snow" : "snow.pbm",
+    }
+    if name in equiv:
+        fname = equiv[name]
+    else:
+        return np.zeros((8,16))
+
+    f = open(fname,"r")
+    f.readline()
+    f.readline()
+    f.readline()
+
+    result = np.zeros((16,16))#should be 8x16
+    for i in range(8):
+        l = f.readline()[:-1]
+        for ind,bit in enumerate(l):
+            result[i][ind] = bit
+
+    return result

clock/api/hat/__init__.py

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+# Placeholder

clock/api/hat/sim.py

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+import sys
+import colorsys
+import pygame.gfxdraw
+import time
+import pygame
+import numpy
+
+class UnicornHat(object):
+    def __init__(self, width, height):
+        # Compat with old library
+
+        # Set some defaults
+        self.rotation(0)
+        self.pixel_size = 20
+        self.height = height
+        self.width = width
+        self.pixels = numpy.zeros((self.height,self.width,3), dtype=int)
+
+        self.window_width = self.width * self.pixel_size
+        self.window_height = self.height * self.pixel_size
+
+        # Init pygame and off we go
+        pygame.init()
+        pygame.display.set_caption("Unicorn HAT simulator")
+        self.screen = pygame.display.set_mode([self.window_width, self.window_height])
+        self.clear()
+
+
+    def set_pixel(self, x, y, r, g, b):
+        self.pixels[x][y] = int(r), int(g), int(b)
+
+
+    def set_matrix(self, matrix):
+        self.pixels = matrix
+        self.show()
+
+
+    def draw(self):
+        for event in pygame.event.get(): # User did something
+            if event.type == pygame.QUIT:
+                print("Exiting...")
+                sys.exit()
+
+        for i in range(self.height):
+            for j in range(self.width):
+                self.draw_led(i,j)
+
+
+    def draw_led(self,i, j):
+        p = self.pixel_size
+        w_x = int(j * p + p / 2)
+        #w_y = int((self.height - 1 - y) * p + p / 2)
+        w_y = int(i * p + p / 2)
+        r = int(p / 4)
+        color = self.pixels[i,j,:]
+        pygame.gfxdraw.aacircle(self.screen, w_x, w_y, r, color)
+        pygame.gfxdraw.filled_circle(self.screen, w_x, w_y, r, color)
+
+
+    def show(self):
+        self.clear()
+        self.draw()
+        pygame.display.flip()
+        #time.sleep(5)
+
+
+    def get_shape(self):
+        return (self.width, self.height)
+
+
+    def set_brightness(self, *args):
+        pass
+
+
+    def rotation(self, r):
+        self._rotation = int(round(r/90.0)) % 3
+
+
+    def clear(self):
+        self.screen.fill((0, 0, 0))
+
+
+    def get_rotation(self):
+        return self._rotation * 90
+
+
+    def set_layout(self, *args):
+        pass
+
+
+    def off(self):
+        print("Closing window")
+        #pygame.quit()
+
+
+
+"""
+# SD hats works as expected
+#unicornhat = UnicornHatSim(8,8)
+#unicornphat = UnicornHatSim(8, 4)
+
+# Unicornhat HD seems to be the other way around (not that there's anything wrong with that), so we rotate it 180°
+# unicornhathd = UnicornHatSim(16, 16, 180)
+"""
+# twohats = UnicornHat(32, 16)
+#
+# for i in range(16):
+#     twohats.set_pixel(i,i, 200,200,200)
+#     twohats.show()
+#     time.sleep(1)

clock/api/hat/unicorn.py

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+import colorsys
+import time
+import numpy
+
+import RPi.GPIO as GPIO
+
+
+class UnicornHat(object):
+    def __init__(self, width, height, rotation_offset = 0):
+        self.PIN_CLK = 11
+        ##################################
+        # GPIO Pins for the actual signal. The other ones are for signal clocks and resets.
+        self.PINS_DAT = [10, 22]
+        ##################################
+        self.PIN_CS = 8
+
+        GPIO.setmode(GPIO.BCM)
+        GPIO.setwarnings(False)
+        GPIO.setup(self.PIN_CS, GPIO.OUT, initial=GPIO.HIGH)
+        GPIO.setup(self.PIN_CLK, GPIO.OUT, initial=GPIO.LOW)
+        GPIO.setup(self.PINS_DAT, GPIO.OUT, initial=GPIO.LOW)
+
+        self.SOF = 0x72
+        self.DELAY = 1.0/120
+        self.WIDTH = width #32
+        self.HEIGHT = height #16
+
+        self.rotation = 1
+        self.brightness = 1
+        self.buffer = numpy.zeros((self.HEIGHT,self.WIDTH,3), dtype=int)
+
+        self.reset_clock()
+
+    def reset_clock(self):
+        GPIO.output(self.PIN_CS, GPIO.LOW)
+        time.sleep(0.000001)
+        GPIO.output(self.PIN_CS, GPIO.HIGH)
+
+    def spi_write(self, buf1, buf2):
+        GPIO.output(self.PIN_CS, GPIO.LOW)
+
+        self.spi_write_byte(self.SOF, self.SOF)
+
+        for x in range(len(buf1)):
+            b1, b2= buf1[x], buf2[x]
+            self.spi_write_byte(b1, b2)
+            time.sleep(0.0000001)
+
+        GPIO.output(self.PIN_CS, GPIO.HIGH)
+
+    def spi_write_byte(self, b1, b2):
+        for x in range(8):
+            GPIO.output(self.PINS_DAT[0], b1 & 0b10000000)
+            GPIO.output(self.PINS_DAT[1], b2 & 0b10000000)
+            GPIO.output(self.PIN_CLK, GPIO.HIGH)
+            b1 <<= 1
+            b2 <<= 1
+            time.sleep(0.00000001)
+            GPIO.output(self.PIN_CLK, GPIO.LOW)
+
+    def set_brightness(self, b):
+        """Set the display brightness between 0.0 and 1.0.
+        :param b: Brightness from 0.0 to 1.0 (default 1)
+        """
+        self.brightness = b
+
+    def rotation(self, r):
+        """Set the display rotation in degrees.
+        Actual rotation will be snapped to the nearest 90 degrees.
+        """
+        self.rotation = int(round(r/90.0))
+
+    def get_rotation(self):
+        """Returns the display rotation in degrees."""
+        return self.rotation * 90
+
+    def set_layout(self, pixel_map=None):
+        """Does nothing, for library compatibility with Unicorn HAT."""
+        pass
+
+    def set_all(self, r, g, b):
+        self.buffer[:] = r, g, b
+
+    def set_pixel(self, x, y, r, g, b):
+        """Set a single pixel to RGB colour.
+        :param x: Horizontal position from 0 to width
+        :param y: Veritcal position from 0 to height
+        :param r: Amount of red from 0 to 255
+        :param g: Amount of green from 0 to 255
+        :param b: Amount of blue from 0 to 255
+        """
+        self.buffer[y][x] = r, g, b
+
+
+    def set_matrix(self, matrix):
+        self.buffer = matrix
+        self.show()
+
+
+    def set_pixel_hsv(self, x, y, h, s=1.0, v=1.0):
+        """set a single pixel to a colour using HSV.
+         :param x: Horizontal position from 0 to 15
+         :param y: Veritcal position from 0 to 15
+         :param h: Hue from 0.0 to 1.0 ( IE: degrees around hue wheel/360.0 )
+         :param s: Saturation from 0.0 to 1.0
+         :param v: Value (also known as brightness) from 0.0 to 1.0
+        """
+
+        r, g, b = [int(n*255) for n in colorsys.hsv_to_rgb(h, s, v)]
+        self.set_pixel(x, y, r, g, b)
+
+    def get_pixel(self, x, y):
+        return tuple(self.buffer[x][y])
+
+    def shade_pixels(self, shader):
+        for x in range(self.WIDTH):
+            for y in range(self.HEIGHT):
+                r, g, b = shader(x, y)
+                self.set_pixel(x, y, r, g, b)
+
+    def get_pixels(self):
+        return self.buffer
+
+    def get_shape(self):
+        """Return the shape (width, height) of the display."""
+
+        return self.WIDTH, self.HEIGHT
+
+    def clear(self):
+        """Clear the buffer."""
+        self.buffer.fill(0)
+
+    def off(self):
+        """Clear the buffer and immediately update Unicorn HAT HD.
+        Turns off all pixels.
+        """
+        self.clear()
+        self.show()
+
+    def show(self):
+        """Output the contents of the buffer to Unicorn HAT HD."""
+        ##########################################################
+        ## Change to desire
+        buff1 = numpy.rot90(self.buffer[:self.HEIGHT,:16],1)
+        buff2 = numpy.rot90(self.buffer[:self.HEIGHT,16:32],1)
+        ##########################################################
+
+        buff1, buff2 = [(x.reshape(768) * self.brightness).astype(numpy.uint8).tolist() for x in (buff1, buff2)]
+
+        self.spi_write(buff1, buff2)
+
+        time.sleep(self.DELAY)

clock/api/led_out.py

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+import time
+import numpy as np
+
+from clock.api import converter
+try:
+    from clock.api.hat import unicorn as HAT
+except ImportError:
+    print("Using the simulator")
+    from clock.api.hat import sim as HAT
+
+
+
+class OutputHandler():
+    def __init__(self, width, height):
+        """width is presumed to be larger than height"""
+        self.width = width
+        self.height = height
+        self.output = HAT.UnicornHat(width, height)
+        self.primary = [230, 230, 230]
+        self.secondary = [10, 200, 10]
+        self.red = [200, 10, 10]
+        self.weather_string = ""
+        self.weather_matrix = []
+
+
+    def set_matrix(self, matrix, quadrant, colors = []):
+        """assumes 1 for primary, 2 for secondary color (everything beyond is treated as an error)
+        quadrant: 1,2,3,4 : 4|1
+                            ___
+                            3|2
+        """
+
+        # reshape to the main size: (eg 32x16) (always aligns the given matrix on top left.)
+
+        c1 = self.primary
+        c2 = self.secondary
+        c3 = self.red
+        if len(colors) == 1:
+            c1 = colors[0]
+        if len(colors) == 2:
+            c2 = colors[1]
+        if len(colors) == 3:
+            c3 = colors[2]
+        if len(colors) > 3:
+            print("Too many colors")
+
+        result = np.zeros((self.height, self.width))
+        if quadrant == 1:
+            result[:matrix.shape[0], self.width-matrix.shape[1]:] = matrix
+        elif quadrant == 2:
+            result[self.height-matrix.shape[0]:, self.width-matrix.shape[1]:] = matrix
+        elif quadrant == 3:
+            result[self.height-matrix.shape[0]:, :matrix.shape[1]] = matrix
+        else: # 4 or more
+            result[:matrix.shape[0], :matrix.shape[1]] = matrix
+
+        # add depth (rgb values)
+        r3 = np.zeros((self.height,self.width,3),dtype=int)
+        for i in range(self.height):
+            for j in range(self.width):
+                t = int(result[i, j])
+                if t == 0:
+                    r3[i, j, :] = [0,0,0]
+                elif t == 1:
+                    r3[i, j, :] = c1
+                elif t == 2:
+                    r3[i, j, :] = c2
+                else:
+                    r3[i, j, :] = c3
+        self.output.set_matrix(r3)
+
+
+    def clock_face(self,weather):
+        hour = converter.time_converter()
+        day = converter.date_converter()
+        face1 = hour + day
+
+        if self.weather_matrix == [] or weather != self.weather_string:
+            self.weather_matrix = converter.weather_converter("clouds")
+            self.weather_string = weather
+
+        face2 = self.weather_matrix
+
+        face = np.zeros((max(face1.shape[0],face2.shape[0]),face1.shape[1]+face2.shape[1]))
+        face[:face1.shape[0],:face1.shape[1]] = face1
+        face[:face2.shape[0],face1.shape[1]:] = face2
+        self.set_matrix(face, 4)
+
+
+    def text_scroll(self, text, speed, color):
+        pixels = converter.text_converter(text, 12)
+        sleep_time = 1 / speed
+        if color == "":
+            colors = []
+        else:
+            colors = [color]
+
+        frames = pixels.shape[1] - self.width
+        if frames <= 0:
+            frames = 1
+
+        for i in range(frames):
+            visible = pixels[:,i:self.width+i]
+            self.set_matrix(visible,4,colors)
+            time.sleep(sleep_time)
+        time.sleep(10 * sleep_time)