Have been using these for several months now, one of the Pis being used as a replacement. After 2 months without pluggin it, the clock is still accurate time and date...
Just a few seconds drift.
www.amazon.com/DS3231-Precision-Memory-A...id=1616597955&sr=8-1
Use :
modprobe rtc-ds3232
echo ds3232 0x68 > /sys/class/i2c-adapter/i2c-1/new_device
- Marc
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