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HARDKERNEL RTC Shield Quick Start Manual

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2023/06/21 15:35
RTC Wake-up
You can wake your Odroid-C4 up with our
Setup system to use RTC Shield
First of all, to enable your RTC shield on your Odroid-C4, please follow the dedicated guide.
https://wiki.odroid.com/internal/common/accessory/add-on_boards/rtc_shield
Configure
Setup the system time
Set the system time up to your local time by following the commands below.
target
sudo dpkg-reconfigure tzdata
Then the final outputs will be looking like that.
target
odroid@odroid:~$
Current default
Local
time
ODROID Wiki - https://wiki.odroid.com/
sudo dpkg-reconfigure tzdata
time
zone:
is now:
Wed Apr
1/5
RTC
Shield.
'Asia/Seoul'
8 12:07:55
KST 2020.
RTC Wake-up

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Summary of Contents for HARDKERNEL RTC Shield

  • Page 1 RTC Wake-up You can wake your Odroid-C4 up with our Shield. Setup system to use RTC Shield First of all, to enable your RTC shield on your Odroid-C4, please follow the dedicated guide. https://wiki.odroid.com/internal/common/accessory/add-on_boards/rtc_shield Configure Setup the system time Set the system time up to your local time by following the commands below.
  • Page 2 -w -f /dev/rtc1 In Odroid-C4, the RTC shield will appear as /dev/rtc1 on your system. So you should add -f option to choose a specify device file when you are using hwclock command. We assume that the RTC shield is /dev/rtc1 on the system.

  • Page 3: Troubleshooting

    If the H/W clock is not configured yet, the RTC device node won't be created. Please see the RTC shield wiki page to check if all the settings are correct. To check further, you can use i2cdetect tool to check if the RTC shield works via I2C communication. target sudo apt update &&...
  • Page 4 Last update: odroid-c4:application_note:rtc_wakeup https://wiki.odroid.com/odroid-c4/application_note/rtc_wakeup?rev=1586338738 2020/04/08 18:38 odroid@odroid:~$ sudo i2cdetect -y 2 -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --...
  • Page 5 2023/06/21 15:35 RTC Wake-up ODROID Wiki - https://wiki.odroid.com/...