Display Data on LCD Screen

An LCD display can be equipped with an additional processing chip to process the data. The processing chip can connect to a microcontroller

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Description

This is a 16x2 LCD display screen with I2C interface. It is able to display 16x2 characters on 2 lines, white characters on Yellow background.

Details

Ameba RTL8722DM is a low-power dual-band WLAN and Bluetooth Low Energy SoC by Realtek. The RTL8722DM also include memory for Wi-Fi protocol functions and application making it simple for anyone to develop various kind of IoT applications. At the same time it has a wide range of peripheral interfaces. With all these interfaces, it can connect to most of the electronics components like LEDs, temperature and humidity sensors, and so on.

More Resources:

If you need additional technical documents or the source code for this project. Please visit the official websites and join the Facebook group and forum.

Ameba Official Website: https://www.amebaiot.com/en/
Ameba Facebook Group: https://www.facebook.com/groups/amebaioten
Ameba Forum: https://forum.amebaiot.com/

Components

1 × RTL8722DM_MINI Microcontroller
1 × I2C 16x2 LCD Screen

Build Instructions

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1

Setup

Normally there are many pins on an LCD display, as shown in below figure.
An LCD display can be equipped with an additional processing chip to process the data. The processing chip can connect to a microcontroller using the I2C interface.
2

Programming

Open the example in “File” -> “Examples” -> “AmebaWire” -> “LCD_HelloWorld”.
Compile and upload to Ameba, then press the reset button.
3

Final Results

Then you can see “Hello World” in the first line, and “Ameba” in the second line displayed on the LCD screen.
After 8 seconds, you can input to the Serial Monitor the string you would like to display on the LCD.
For example, we enter “123456789” and press “Send”: