46 lines
823 B
Plaintext
46 lines
823 B
Plaintext
<!DOCTYPE txt>
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<!Version: 0.1>
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<!Date: 16.11.2017>
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raspi-config
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---------------------------
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Interfacing Options
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I2C enable
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----------------------------
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nano /boot/config.txt
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add at end
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--------------------------
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# Enable HWclock
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dtoverlay=i2c-rtc,ds3231
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-------------------------
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nano /lib/udev/hwclock-set
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comment out
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--------------------------
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if [ -e /run/systemd/system ] ; then
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exit 0
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fi
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-------------------------
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Good to know:
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read time directly from rtc module
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hwclock -r
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update rtc module time from system time (system time should be regularly updated by ntp from the internet if your pi is networked):
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hwclock -w
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update system time from the rtc module (this should happen on startup):
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hwclock -s
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and the most fun of all - monitor the "drift" between your system clock and the rtc module:
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hwclock -c
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