How to use RTC on nrf54l15 micropython zephyr port

[jkorte-dev]

Hi I tried to use the RTC on nrf54l15 board with the latest micropython build but setting the time throws an error:

>>> sys.implementation
(name='micropython', version=(1, 27, 0, 'preview'), _machine='zephyr-xiao_nrf54l15 with nrf54l15', _mpy=774)
>>> from RTC import RTC
>>> rtc = RTC()
>>> rtc.set_datetime((2025, 8, 31, 15, 55, 0))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: RTC device not initialized

When I pass an argument to the RTC I get an error "device not found"

rtc = RTC("nrf-rtc")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: device nrf-rtc not found
```

[Lee-Stone]

Hello @jkorte-dev ,

You need to refer to this wiki document and this RTC example.

[jkorte-dev]

Thank you for your rely. I actually tried the rtc.py example, but it is not documented in the wiki. Now I discovered by looking at the source code that the RTC module is for external I2C connected RTC module PCF8523. I though is was for internal RTC which is normally controlled by machine.RTC module of micropython.