About time the ArmmiteH7 got some TLC: V5.07.01 betas

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Joined: 11/12/2012
Location: United Kingdom
Posts: 6129
Posted: 03:52pm 23 Jan 2022      

The later HAL library fixed a bug in the RTC drive current. One possibility is you have a higher capacitance crystal on the RTC. The Nucleo is 6pF and the firmware is targetted for that. Try reducing the load capacitors on your RTC crystal