https://devzone.nordicsemi.com/f/nordic-q-a/82242/timer-operation-uneven-delaysHello everyone, I combined work with a timer and an example from ble_app_aurt pca10040 s132, the problem is that the timer does not work evenly, yes, I know about the low priority of the timer, but this does not explain why delays of 182μs can last foren-USTelligent Community 13Tue, 30 Nov 2021 17:09:28 GMThttps://devzone.nordicsemi.com/thread/341373?ContentTypeID=1Tue, 30 Nov 2021 17:09:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78db8971-bcb2-4abb-a058-92a8d2438134Karl Ylvisaker<p>Hello,<br /><br />I see a couple of potential issues with the sparse code you have supplied. First of all, you are not checking the error codes returned by SDK functions such as <em>ble_nus_data_send</em>. I do not think that is the reason as to why you are seeing uneven timer interrupts, but it is in general not a good practice which certainly will spawn other issues later in your development.<br />Furthermore it seems that you have an infinite for-loop in your uart_handler. This is also bad practice, because you will never return to the main context, and you will block all equal-to-or-lower priority interrupts in your program.<br /><br />Please fix these things, and provide more information / more of the code if this does not resolve your issues.<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>