Keyestudio Basic starter kit, Manual

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97
delay(10);
LcdCommandWrite(0x80+5); // set cursor position at first line, sixth position
delay(10);
LcdDataWrite('t');
LcdDataWrite('h');
LcdDataWrite('e');
LcdDataWrite(' ');
LcdDataWrite('a');
LcdDataWrite('d');
LcdDataWrite('m');
LcdDataWrite('i');
LcdDataWrite('n');
delay(5000);
}
//////////////////////////////////////////////////////////
4-bit connection method:
When using this module, 8-bit connection uses all the digital pins of the Arduino, leaving no pin for
sensors. What then? We can use 4-bit connection.
Connection circuit:
Connection for R3: