Understanding LCD displays and their connection types

Sometimes, our IoT device has to provide information to the user with any device connected to an Intel Galileo Gen 2 board. We can use different kinds of electronic components, shields, or breakout boards to achieve this goal.

For example, we can use simple LEDs to provide information that we can represent with colors. For example, a red LED that turns on can indicate that our temperature sensor connected to the board has detected that the ambient temperature is higher than 80 degrees Fahrenheit (ºF) or 26.66 degrees Celsius (ºC). A blue LED that turns on can indicate that our temperature sensor had detected that the ambient temperature is lower than 40 degrees Fahrenheit (ºF) or 4.44 degrees Celsius (ºC). A red LED turned on can indicate that the temperature is between these two values. These three LEDs allow us to provide valuable information to the user.

We can also achieve the same goal using a single RGB LED and work with pulse width...