feat: 全量同步 254 个常用的 Arduino 扩展库文件

arduino-libs/arduino-cli/libraries/LiquidCrystal_I2C/examples/hello_2004/hello 2004.pde

@@ -0,0 +1,23 @@
+//2004 I2C LCD DEMO
+//BY KEYES 
+#include <Wire.h> 
+#include <LiquidCrystal_I2C.h>
+LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display
+void setup()
+{
+  lcd.init();   // initialize the lcd 
+  lcd.init();
+  lcd.backlight();
+}
+void loop()
+{ 
+  // Print a message to the LCD.
+  lcd.setCursor(0,0);
+  lcd.print("Hello, world!");
+  lcd.setCursor(0,1);
+  lcd.print("KEYES  Arduino!");
+   lcd.setCursor(0,2);
+  lcd.print("thanks");
+  lcd.setCursor(0,3);
+  lcd.print("This test is ok");
+}