https://devzone.nordicsemi.com/f/nordic-q-a/109437/ppi-library-with-gpiote-cannot-use-zephyrHi, I have a project which uses the Zephyr libraries for SPI, I2C and GPIO. I had a need to toggle a pin using a timer so though the best case would be to use the PPI with the GPIOTE. From examples these use the nrfx libraries. I setup the code in aen-USTelligent Community 13Tue, 19 Mar 2024 14:29:30 GMThttps://devzone.nordicsemi.com/thread/474659?ContentTypeID=1Tue, 19 Mar 2024 14:29:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:96978ba1-cf0f-48ca-8a1e-0a407f4ada5baarondashine<p>Sorry - fixed it myself. I was re-initialising the GPIOTE peripheral and it was nothing to do with the mixed libraries!&nbsp;</p><div style="clear:both;"></div>