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libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.pde

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+/*
+ * Displays text sent over the serial port (e.g. from the Serial Monitor) on
+ * an attached LCD.
+ */
+#include <Wire.h> 
+#include <LiquidCrystal_I2C.h>
+
+#define BACKLIGHT_PIN     13
+
+LiquidCrystal_I2C lcd(0x38);  // set the LCD address to 0x38
+
+void setup()
+{
+  pinMode ( BACKLIGHT_PIN, OUTPUT );
+  lcd.begin (16,2); 
+  digitalWrite ( BACKLIGHT_PIN, HIGH );
+  
+  Serial.begin(57600);
+}
+
+void loop()
+{
+  // when characters arrive over the serial port...
+  if (Serial.available()) 
+  {
+    // wait a bit for the entire message to arrive
+    delay(100);
+    // clear the screen
+    lcd.clear();
+    // read all the available characters
+    while (Serial.available() > 0) 
+    {
+      // display each character to the LCD
+      lcd.write(Serial.read());
+    }
+  }
+}