def begin(self, contrast=40, bias=4):
		self.reset()
		# Set LCD bias.
		self.set_bias(bias)
		self.set_contrast(contrast)
Create a new ObservedItem.
dataset/ETHPy150Open adafruit/Adafruit_Nokia_LCD/Adafruit_Nokia_LCD/PCD8544.py/PCD8544.begin--crossover with--dataset/ETHPy150Open davemerwin/blue-channel/external_apps/notification/models.py/observe