[Solved / Archived] Watch battery/Not keeping time

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Last Post by uugear 1 year ago

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insideoutgrp

(@insideoutgrp)

Posts: 9

Active Member

Topic starter

Has the watch battery usage been changed or removed?

Recent units we have seem to not keep time (so when powered down, they come back on with a time that is hours or days out) - the watch batteries CR2032 is correctly installed and charged but doesnt seem to work.

I've seen in the manual it says these are removed now in - Since February 2023, the CR2032 battery is replaced by the 30 cm XH2.54 cable.

Can you clarify?

Thanks
Jay

Posted : 18/09/2023 10:57 am

uugear

(@admin)

Posts: 479

Member Admin

The CR2032 battery is no longer included in Witty Pi 4 package, but the functionality to use this battery for off-power time keeping has not changed.

When Witty Pi 4 is not powered, and you have the CR2032 battery installed, you may use a multimeter to measure the voltage between pin 3V3 and GND in the unpopulated header P3, you should read about 2.8~2.9V (the voltage from battery after a diode). This voltage is to keep the RTC chip powered.

Posted : 18/09/2023 11:17 am