Displaying text on an LCD display

The upm library includes support for the 16x2 LCD RGB backlight breakout board in the pyupm_i2clcd module. The Jhd1313m1 class declared in this module represents a 16x2 LCD display and its RGB backlight, connected to our board. The class makes it easy to set the color components for the RGB backlight, clear the LCD display, specify the cursor location, and write text through the I²C bus. The class works with the mraa.I2c class under the hoods to talk with the RGB backlight and the LCD display. These two devices act as slave devices connected to the I²C bus, and therefore, each of them have a specific address in this bus.

We will take the code we wrote in the previous chapter when we read temperature and humidity values from the sensor and we will use this code as a baseline to add the new features. The code file for the sample was iot_python_chapter_07_05.py.

We will create an Lcd class to represent the 16x2 LCD RGB backlight and make it easier for us to set...