Big issue with no vbat for WIO Terminal internal RTC. With Wio Terminal Chassis - Battery attached and you power off WIO terminal you loose time when you power back up. Is there anyway to add vbat or am I missing something to enable vbat.
Thanks
I’m not sure there is one, but you can find the answer on the schematic.
I have a similar issue - but slightly different behaviour:
I use the built-in RTC and it works fine with WIO connected to USB-C power.
I wrote a small routine that displays the RTC time on the WIO screen. It works fine as long as power is present. The RTC time is set at compile time, using DATE and TIME .
Problem: When I disconnect power for (example) 15 minutes, and reconnect to power, the clock starts running again, but is 15 minutes behind.
So the WIO’s RTC module seems to have some kind of memory for the current time, but seems to stop running when power is absent. Schematic doesn’t tell me much…I see no RTC… the name of the library is RTC_SAMD51.h, so I assume the RTC is somewhere inside the processor.
I know that I could re-sync the RTC using NTP over Wifi, but that is not a good option as I plan to use it outdoors with no Wifi. Any ideas on how to keep the RTC running?
they should not call Real Time Clock unless it is a Real Time Clock… everything else is not a Real Time Clock… it is a Coo Coo Clock
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Tx for confirming what I’m thinking:
What I see in addition to earlier observations:
- There are no batteries or supercaps on the WIO diagram
- No methods in the library that would enable something
- Some people work with external RTCs - presumably since the onboard RTC has limitations.