Class BrickletRealTimeClock


  • public class BrickletRealTimeClock
    extends Device
    Battery-backed real-time clock
    • Constructor Detail

      • BrickletRealTimeClock

        public BrickletRealTimeClock​(java.lang.String uid,
                                     IPConnection ipcon)
        Creates an object with the unique device ID \c uid. and adds it to the IP Connection \c ipcon.
    • Method Detail

      • setDateTime

        public void setDateTime​(int year,
                                short month,
                                short day,
                                short hour,
                                short minute,
                                short second,
                                short centisecond,
                                short weekday)
                         throws TinkerforgeException
        Sets the current date (including weekday) and the current time. If the backup battery is installed then the real-time clock keeps date and time even if the Bricklet is not powered by a Brick. The real-time clock handles leap year and inserts the 29th of February accordingly. But leap seconds, time zones and daylight saving time are not handled.
        Throws:
        TinkerforgeException
      • getTimestamp

        public long getTimestamp()
                          throws TinkerforgeException
        Returns the current date and the time of the real-time clock. The timestamp has an effective resolution of hundredths of a second and is an offset to 2000-01-01 00:00:00.000.
        Throws:
        TinkerforgeException
      • setOffset

        public void setOffset​(byte offset)
                       throws TinkerforgeException
        Sets the offset the real-time clock should compensate for in 2.17 ppm steps between -277.76 ppm (-128) and +275.59 ppm (127). The real-time clock time can deviate from the actual time due to the frequency deviation of its 32.768 kHz crystal. Even without compensation (factory default) the resulting time deviation should be at most ±20 ppm (±52.6 seconds per month). This deviation can be calculated by comparing the same duration measured by the real-time clock (``rtc_duration``) an accurate reference clock (``ref_duration``). For best results the configured offset should be set to 0 ppm first and then a duration of at least 6 hours should be measured. The new offset (``new_offset``) can be calculated from the currently configured offset (``current_offset``) and the measured durations as follow:: new_offset = current_offset - round(1000000 * (rtc_duration - ref_duration) / rtc_duration / 2.17) If you want to calculate the offset, then we recommend using the calibration dialog in Brick Viewer, instead of doing it manually. The offset is saved in the EEPROM of the Bricklet and only needs to be configured once.
        Throws:
        TinkerforgeException
      • setAlarm

        public void setAlarm​(byte month,
                             byte day,
                             byte hour,
                             byte minute,
                             byte second,
                             byte weekday,
                             int interval)
                      throws TinkerforgeException
        Configures a repeatable alarm. The BrickletRealTimeClock.AlarmListener listener is triggered if the current date and time matches the configured alarm. Setting a parameter to -1 means that it should be disabled and doesn't take part in the match. Setting all parameters to -1 disables the alarm completely. For example, to make the alarm trigger every day at 7:30 AM it can be configured as (-1, -1, 7, 30, -1, -1, -1). The hour is set to match 7 and the minute is set to match 30. The alarm is triggered if all enabled parameters match. The interval has a special role. It allows to make the alarm reconfigure itself. This is useful if you need a repeated alarm that cannot be expressed by matching the current date and time. For example, to make the alarm trigger every 23 seconds it can be configured as (-1, -1, -1, -1, -1, -1, 23). Internally the Bricklet will take the current date and time, add 23 seconds to it and set the result as its alarm. The first alarm will be triggered 23 seconds after the call. Because the interval is not -1, the Bricklet will do the same again internally, take the current date and time, add 23 seconds to it and set that as its alarm. This results in a repeated alarm that triggers every 23 seconds. The interval can also be used in combination with the other parameters. For example, configuring the alarm as (-1, -1, 7, 30, -1, -1, 300) results in an alarm that triggers every day at 7:30 AM and is then repeated every 5 minutes. .. versionadded:: 2.0.1$nbsp;(Plugin)
        Throws:
        TinkerforgeException
      • getIdentity

        public Device.Identity getIdentity()
                                    throws TinkerforgeException
        Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier. The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an :ref:`Isolator Bricklet <isolator_bricklet>` is always at position 'z'. The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|
        Specified by:
        getIdentity in class Device
        Throws:
        TinkerforgeException