[riot-notifications] [RIOT-OS/RIOT] lorawan-example not working (#10352)
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Tue Jan 29 19:50:06 CET 2019
> xtimer is still used while not knowing how inaccurate it is (no use of crystal on ST B-L072Z-LRWAN1)
By default this board uses HSI and LSI for RTC. So yes there's 1% error when using these clock sources. It's possible to use LSE to clock the LPTIM1, I did it with good results on RTT. But I'm still facing issues with RTC using LSE (it cannot switch to config mode).
> it is also used for tracking the dutycyle usage but it will be stoped in many sleep modes of the cpu (using LPTIM/RTT/RTC might help whith this)
Definitely a problem with low-power, we use xtimer to determine when the dutycycle defay is finished. This is something on my todo-list: replace it with RTT (LPTIM) and maybe one day by the famous _ztimer_
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