Added HD44780 compatible LCD to display arbitrary text and the current time.

constants.h

@@ -12,17 +12,24 @@
 #include <FastLED.h>
 
 // IO Pin Assignments
-const uint8_t pinLeds = 3;
-const uint8_t pinButton = 5;
+// moved PINs out of the way of LCD
+const uint8_t pinLeds = 6;
+const uint8_t pinButton = 7;
 const uint8_t pinBrightness = 0;
 
 // Define MAC Address
 byte mac[] = {
-    0xA8, 0x61, 0x0A, 0x10, 0x24, 0x01
+    0xA8, 0x61, 0x0A, 0x10, 0x24, 0x02
 };
 
+// initialize the library by associating any needed LCD interface pin
+// with the arduino pin number it is connected to
+// these differ from the libary / example sketch default to avoid Ethernet shield pins
+const int rs = 10, en = 9, d4 = 5, d5 = 8, d6 = 3, d7 = 2;
+LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
+
 // NTP Server to use
-char* ntp_server = "warpfire.warpzone";
+char* ntp_server = "de.ntp.pool.org";
 
 // Number of LEDs in ring
 const int ledRingSize = 60;

led-ring-clock.ino

@@ -15,6 +15,7 @@
 #include <Ethernet.h>
 #include <Dns.h>
 #include <Dhcp.h>
+#include <LiquidCrystal.h>
 
 #include "constants.h"
 
@@ -36,6 +37,13 @@ void setup() {
 	// Begin serial port
 	Serial.begin(serialPortBaudRate);
 
+	// set up the LCD's number of columns and rows:
+	lcd.begin(20, 4);
+	// Print a message to the LCD.
+	lcd.print("Analoge LED Uhr");
+	lcd.setCursor(4, 3);
+	lcd.print("by Commander1024");
+
     // Initialize Network and NTP
     if (Ethernet.begin (mac) == 0) {
         Serial.println ("Failed to configure Ethernet using DHCP");
@@ -132,6 +140,7 @@ void loop() {
 		// Show clock
 		clearLeds();
 	    showClock();
+	    printLCDtime();
 		
 		// Check/Renew DHCP
 		Ethernet.maintain ();
@@ -156,6 +165,23 @@ void showClock() {
 	}
 }
 
+void printLCDtime() {
+	lcd.setCursor(0, 1);
+	lcd.print("Zeit: ");
+	lcd.setCursor(0, 2);
+    lcd.print(year(now()), DEC);
+    lcd.print(".");
+    lcd.print(month(now()), DEC);
+    lcd.print(".");
+    lcd.print(day(now()), DEC);
+    lcd.print(" ");
+    lcd.print(hour(now()), DEC);
+    lcd.print(":");
+    lcd.print(minute(now()), DEC);
+    lcd.print(":");
+    lcd.print(second(now()), DEC);
+}
+
 // Print debugging info over serial
 void printDebugMessage() {
     Serial.print("Current date/time: ");