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Content import badge, binascii, hashlib, time class LarsonScanner: pride_colors = ("75078700", "004dff00", "00802600", "ffed0000", "ff8c0000", "e4030300") def __init__(self, colors=pride_colors): self.colors = colors self.direction = -1 self.brightness = 1.0 self.current_led = 5 # use 5 if direction is -1, and 0 if direction is 1! self.decay = 0.8 self.speed = 0.1 # duration for sleeps in seconds, as for time.sleep() self.leds_intensity = [1.0 for x in range(6)] def change_brightness(self, value): self.brightness += float(value) self.brightness = round(self.brightness, 2) self.brightness = max(self.brightness, 0.0) # ensure >= 0.0 self.brightness = min(self.brightness, 1.0) # ensure <= 1.0 def change_decay(self, value): self.decay += float(value) self.decay = round(self.decay, 2) self.decay = max(self.decay, 0.0) # ensure >= 0.0 self.decay = min(self.decay, 1.0) # ensure <= 1.0 def get_GRBW(self, led_pos, brightness): color = self.colors[led_pos] led_colors = [int(brightness * x) for x in binascii.unhexlify(color + '00')] return (led_colors[1], led_colors[0], led_colors[2], led_colors[3]) # grbw def draw(self): # Zero make the move of curent_led and check for direction # move works as follows: # 0, 1, 2, 3, 4, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4 .... self.current_led += self.direction if self.current_led in [0, 5]: self.direction = -self.direction # First calc intensity on each led for x, intensity in enumerate(self.leds_intensity): new_intensity = intensity * self.decay self.leds_intensity[x] = round(new_intensity, 3) # But head led gets full intensity. (brightness is later) self.leds_intensity[self.current_led] = 1.0 # print(self.leds_intensity) # Second apply brightness leds = [] for x, intensity in enumerate(self.leds_intensity): leds.append(intensity * self.brightness) # print(leds) # Now we have intensify & brightness, let's apply colors. leds_as_grbw = [] for index, value in enumerate(leds): leds_as_grbw.extend(self.get_GRBW(index, value)) badge.leds_send_data(bytes(leds_as_grbw), 24) def user_colors(name): name_digest = binascii.hexlify(hashlib.sha1(name).digest()) name_colors = (name_digest[30:36], name_digest[24:30], name_digest[18:24], name_digest[12:18], name_digest[6:12], name_digest[0:6]) return list(c.decode() for c in name_colors) def wait(self): time.sleep(self.speed) def test_demo(): scanner = LarsonScanner() while True: scanner.draw() if __name__ == '__main__': test_demo()