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9.1 Realtime Clock
Here you can see the system time and the time in the real-time clock (RTC). You can write the
system time into real-time clock or the other way around. You can also use Internet time to
synchronize the system time and RTC time. You can press ENTER to refresh the time display.
The real-time clock has one alarm and you can configure it to do different things. If you set the alarm
time to a moment in the future (using option 4), the system will reboot when the alarm is triggered. If
you do not use the e-latch power switch, which means your board will not be fully power off after
shutdown, this alarm can also be used to wake up your Raspberry Pi.
Alternatively, you can also use this alarm as a watchdog (using option 5). When watchdog is turned
on, the watchdog.sh process will run in the background and it keeps postponing the alarm. If the
system is crashed and this process is halted, the alarm cannot be postponed and eventually gets
triggered, which will force the system to reboot. This functionality has no confliction with the e-latch
power switch.
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| Realtime Clock |
| |
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>>> Your system time is: Wed 29 Dec 2021 18:03:31 CET
>>> Your RTC time is: Wed 29 Dec 2021 18:03:30 CET
1. Write system time to RTC
2. Write RTC time to system
3. Synchronize with network time
4. Configure alarm [28 17:14:42]
5. Configure watchdog [off]
6. Return
Please choose 1~6:
Summary of Contents for PiGear Nano
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