I need to make a production, and I currently use a KW41Z. Of course, it's near impossible to find any stock, and the lead time is now 52 weeks.
I only use the SMAC 802.15.4 stack, so it seems I can use the KW21Z as a drop in replacement. Can you confirm that it is a direct replacement?
Should I change the init vector (or other stuff?), and is the SMAC stack still compatible (I just modified it a bit to not use the common library and call directly my freertos routine, but the core of the library has not changed)