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X729-script

910 bytes added, 19:24, 22 July 2023

===Enable OLED display===

Refer to [[How to enable OLED display]]

===Set and Read the RTC time===

PS: We only test this step on Raspberry Pi OS;

To enable RTC module, first add <code>dtoverlay=i2c-rtc,ds1307</code> to /boot/config.txt under [all] or the end of file and reboot:

sudo nano /boot/config.txt

Run the commands to disable the "fake hwclock" which interferes with the 'real' hwclock

sudo apt-get -y remove fake-hwclock

sudo update-rc.d -f fake-hwclock remove

sudo systemctl disable fake-hwclock

The run the following command to comment out some line in file <code>/lib/udev/hwclock-set</code>:

sudo nano /lib/udev/hwclock-set

‎<syntaxhighlight lang="python" line highlight="6-11">

#!/bin/sh

# Reset the System Clock to UTC if the hardware clock from which it

# was copied by the kernel was in localtime.

dev=$1

if [ -e /run/systemd/system ] ; then

exit 0

fi

/sbin/hwclock --rtc=$dev --systz

/sbin/hwclock --rtc=$dev --hctosys

‎</syntaxhighlight>

===Other===

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