https://devzone.nordicsemi.com/f/nordic-q-a/38981/twi-in-soft-deviceHi, when the micro go in: idle_state_handle(); I have 2 possibility: If the soft device is present use the first instructions else the second. This is correct, but why in the TWI, during reading or writing, the code use only the __WFE ? Ifen-USTelligent Community 13Mon, 01 Oct 2018 12:34:30 GMThttps://devzone.nordicsemi.com/thread/150966?ContentTypeID=1Mon, 01 Oct 2018 12:34:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fed2999c-b75c-4ad3-983b-3e931047777aKenneth<p>Hi,</p> <p>Using __WFE() in this case will not break anything, but&nbsp;you are right that when the softdevice is enabled one should use&nbsp;sd_app_evt_wait() in general (even in this case if you like).</p> <p>Kenneth</p><div style="clear:both;"></div>