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More discussion here:
https://forums.adafruit.com/viewtopic.php?t=201104
The registers for Alarm 2 of the DS3231 do **not** have seconds:
![alarm_reg](https://user-images.githubusercontent.com/87…
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### I2C sub-system
* [x] REQ_BUF_CLIENT and REQ_BUF_ADDR should be part of the shared ring buffer protocol instead as metadata.
* [x] Too many files exist, it should really just be driver.c and se…
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Hi..can i use the DS3231 RTC with a DIY Deauther? Build one from a D1 Mini Pro with oled, 3 buttons and neopixel..works fine as expected. Now i see in the code that the dstike watch uses a DS3231 rtc.…
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**Describe the bug**
IsDateTimeValid() causes a warning about ambiguous declaration. See below for error output. This can be seen with the DS3231_Simple.ino example script.
```
In file included f…
Tnthr updated
10 months ago
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This is the repo I have been looking for - and you have done it extremely well!
I am working on something very similar: I want to use my RPi 3B in an "off-grid" application. The system is powered …
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This is out of the "alarm" example and will not work, see below for the working example. It took me way too long to figure that one out: There can not be any seconds with Alarm2.
```
// Set Alarm …
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With more people using an RTC in their system it would be good to add the temperature sensor built into the RTC as a sensor in RotorHazard
The DS3231 is what most people seem to use and if it’s ins…
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Hello,
I have an MPU-9250 and use your sample "MPU9250BasicAHRS" from the Sparkfun library. In order to use the RTC DS3231, I changed the I2C address of the MPU-9250 in 0x69 by ADO -> 3.3V and
`#d…
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Currently sntp protocol is used to set the time however M5Core2 has a built-in RTC which could be used to speed-up booting.
Expected drift of about 1 min / month is good enough ([www.switchdoc.com…
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The RTC Ds3231 is all way powered, via 3V3 and via its own battery. With the code test for the RTC DS3231, the I2C communication to the RTC would fail if there is external I2C sensor that connected to…