   uart.begin(57600);
   trace.begin(&uart, PSTR("CosaDS1307: started"));
 
-  // Print calibration
-#if defined(RTC_CALIBRATION_MS)
-  trace << PSTR("RTC:calibration:") << RTC_CALIBRATION_MS << endl;
-#endif
-#if defined(WATCHDOG_CALIBRATION_MS)
-  trace << PSTR("Watchdog:calibration:") << WATCHDOG_CALIBRATION_MS << endl;
-#endif
-
-  // Start the watchdog and internal real-time clock
+  // Start the watchdog for low power yield
   Watchdog::begin();
-  RTC::begin();
 
   // Read the latest set and run time
   latest_t latest;

 * Lesser General Public License for more details.
 *
 * @section Description
 * Cosa demonstration of the DS1307 I2C/Two-Wire Realtime clock device.
 *
 * @section Circuit
 * @code


#include "Cosa/InputPin.hh"
#include "Cosa/OutputPin.hh"
#include "Cosa/Watchdog.hh"
#include "Cosa/Trace.hh"
#include "Cosa/IOStream/Driver/UART.hh"

// Set the real-time clock
// #define SET_TIME

// The real-time device, latest start and sample time in ram
DS1307 rtc;
