The LCD1602 module consists of two parts. The usage voltages are standard as 5V and 3.3V. Both must be connected via pulled-up resistors. I2C is a type of serial bus developed by Philips, which uses two bidirectional lines, called SDA (Serial Data Line) and SCL (Serial Clock Line). The LCD1602 display has an integrated microchip that manages this type of communication, and then all of the input and output information are limited to only two PINs (excluding power supply). This problem has been solved thanks to the communication on the I2C bus. When they are connected to a microcontroller (such as Arduino for example), these displays require virtually many connection PINs occupying practically almost all available IO and leaving the multiprocessor few outputs for any other devices and sensors. However, these displays have a small problem. These values can be either a simple text or numerical values read by the sensors, such as temperature or pressure, or even the number of cycles that the Arduino is performing. The integration of an LCD display greatly facilitates the interactivity of the project you are developing, allowing the user to directly read some output parameters. The LCD1602 – a I2C Liquid Crystal Displayer Finally you will see how to program it with a simple example showing how to display text on the display. In this article you will see how to mount a LCD display on your Arduino using the I2C communication. During the building of your projects for Arduino, you’ll often need to read the output data directly from a LCD display.
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