12864 LCD display module can display letters, numbers,and graphics. It can show graphics and words in mixed display. It can also display 128 (column) * 64 (row) dot matrix.

Three kinds of control interfaces are provided: 8 microprocessor interfaces, 4 microprocessor interfaces, serial interfaces.

Multifunction commands: clear the screen, cursor home, display on / off, cursor on / off, display character blink, cursor shift, display shift, vertical picture scroll and reverse display.

Here are the steps I followed:

1. Short-circuit the‘ S’ contact point with solder (according to the datasheet) to use SPI as the communication protocol
2. Connect LCD’s SPI interface (JP2 pins 3 – 5) to WT32-ETH01 GPIO pins using jumper cables
3. Connect LCD’s power supply (JP2 pins 1 & 2) to the system’s 5V & ground rails.
4. In the Arduino IDE, import the u8g2 libraryusing the ‘library manager’
5. Open File -> Examples -> U8g2 (under Examples from Custom Libraries) -> full_buffer -> HelloWorld
6. Uncomment the correctconstructor (shown below) and change the pins to match the WT32-ETH01 connections.

• Voltage: 5V
• Working temperature under normal temp.: 0～+50℃
• Storage temperature under normal temp.: -10～+60℃
• Working temperature under wide temp.: -20～+70℃
• Storage temperature under wide temp.: -30～+80℃
• Working temperature under ultra wide temp.: -30～+80℃
• Storage temperature under ultra wide temp.: -40～+80℃

1. Datasheet – 128X64 GRAPHIC LCD BLUE
2. Driver – 128X64 GRAPHIC LCD BLUE