speaker.md

@@ -11,6 +11,7 @@
   * **nicht** den "Driver for Seeeduino V4.2" installieren 
 * Input
   * [Wii Nunchuck](http://wiki.seeed.cc/Grove-NunChuck) - <code>I2C</code>
+  * [RTC](http://wiki.seeed.cc/Grove-RTC/) - <code>I2C</code>
 * Output
   * [Speaker](http://wiki.seeed.cc/Grove-Speaker) für die Audio-Effekte<br>
     als digiteler Output <code>#define SPEAKER 3</code> ansteuerbar
@@ -20,7 +21,7 @@
 
 |Vorgehen|Hannok [Handlungsnotwendige Kenntnisse](https://cf.ict-berufsbildung.ch/modules.php?name=Mbk&a=20101&cmodnr=242&noheader=1)|
 |:-------|:------|
-| Töne, Frequenzen | PWM |
+|Töne, Frequenzen | PWM |
 |Tonfolgen erzeugen | Array, Iteration |
 |sinnvolle Datentypen | Array of byte | 
 |Testbarkeit | Loggen, UART |
@@ -55,3 +56,90 @@ void sound(uint8_t note_index) {
 
 ```
 
+# Code Sample RTC
+```c
+/****************************************************************************/
+//	Function: Set time and get the time from RTC chip(DS1307) and display
+//			  it on the serial monitor.
+//	Hardware: Grove - RTC
+//	Arduino IDE: Arduino-1.0
+//	Author:	 FrankieChu
+//	Date: 	 Jan 19,2013
+//	Version: v1.0
+//	by www.seeedstudio.com
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+//
+/****************************************************************************/
+#include <Wire.h>
+#include "DS1307.h"
+
+DS1307 clock;//define a object of DS1307 class
+void setup() {
+  Serial.begin(9600);
+  clock.begin();
+  clock.fillByYMD(2018, 2, 23); // Feb. 23,2013
+  clock.fillByHMS(8, 0, 0);     // 08:00 00"
+  clock.fillDayOfWeek(FRI);     // Friday
+  clock.setTime();              // write time to the RTC chip
+}
+void loop() {
+  printTime();
+  delay(1000);
+}
+/*Function: Display time on the serial monitor*/
+void printTime()
+{
+  clock.getTime();
+  Serial.print(clock.hour, DEC);
+  Serial.print(":");
+  Serial.print(clock.minute, DEC);
+  Serial.print(":");
+  Serial.print(clock.second, DEC);
+  Serial.print("	");
+  Serial.print(clock.month, DEC);
+  Serial.print("/");
+  Serial.print(clock.dayOfMonth, DEC);
+  Serial.print("/");
+  Serial.print(clock.year + 2000, DEC);
+  Serial.print(" ");
+  Serial.print(clock.dayOfMonth);
+  Serial.print(" day of month is a ");
+  switch (clock.dayOfWeek) { // Friendly printout the weekday
+    case MON:
+      Serial.print("MONDAY");
+      break;
+    case TUE:
+      Serial.print("TUESDAY");
+      break;
+    case WED:
+      Serial.print("WEDNSDAY");
+      break;
+    case THU:
+      Serial.print("THURSDAY");
+      break;
+    case FRI:
+      Serial.print("FRIDAY");
+      break;
+    case SAT:
+      Serial.print("SATURDAY");
+      break;
+    case SUN:
+      Serial.print("SUNDAY");
+      break;
+  }
+  Serial.println(" ");
+}
+```
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