https://devzone.nordicsemi.com/f/nordic-q-a/65808/twi-unresponsive-when-sending-apds-9306-stop-commandHello, We are developing a product using a nrf52832 and an APDS-9306 ambient light sensor. This sensor interface using the TWI peripheral. We are using the 14.2.0 SDK and the twi_mngr library. When writing/reading on most registers on the APDS everythingen-USTelligent Community 13Fri, 11 Sep 2020 12:54:18 GMThttps://devzone.nordicsemi.com/thread/269171?ContentTypeID=1Fri, 11 Sep 2020 12:54:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d24329b7-e8e6-4b72-bc27-9ef62e96330bJared<p>Hi,</p> <p>It seems that the Slave doesn&#39;t send the ACK and the nRF is therefore re sending the byte. Getting stuck in the&nbsp;nrf_twi_mngr_perform() has been discussed before on this forum,&nbsp;see the purposed <a href="https://devzone.nordicsemi.com/f/nordic-q-a/21639/twi-infinate-loop">solution here</a>. You can try to do a STOP TASK when the timer expires to end the transfer.&nbsp;</p> <div> <div><span>regards</span></div> <div><span>Jared&nbsp;</span></div> </div><div style="clear:both;"></div>