https://devzone.nordicsemi.com/f/nordic-q-a/15410/uart-communication-error-hangs-rx-tx-nrf52Hi, I&#39;am having an issue with UART using app_uart_fifo.c (SDK 0.9.2). At times I get communication error (usually at attaching and detaching uart connector) and my error handler: switch(app_uart_evt_p-&gt;evt_type){ case APP_UART_COMMUNICATION_ERRORen-USTelligent Community 13Fri, 29 Jul 2016 12:57:30 GMThttps://devzone.nordicsemi.com/thread/58829?ContentTypeID=1Fri, 29 Jul 2016 12:57:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ab4f28d2-7b16-4360-bca8-d06828b736daOskarM<p>I&#39;ll try next week with that. regards</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/58828?ContentTypeID=1Fri, 29 Jul 2016 10:27:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f0f17920-234b-4be8-aa89-b5bc66c370c3Ole Bauck<p>This should be fixed in SDK 11.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/58827?ContentTypeID=1Fri, 29 Jul 2016 08:40:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b01a0c1-f9f1-4deb-8e81-a948d0fec735OskarM<p>I will shortly. I spent few minutes to dig into SDK and from the first glance it will be the same issue in SDK11: interrupts are disabled in UART driver at error and if you use app_uart+app_uart_fifo.c library, there is no way of enabling them without full reinit. I&#39;d recommend putting reinit in app_uart_flush()</p> <p>I think a tweak to app_uart_fifo is what I need to do...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/58826?ContentTypeID=1Thu, 28 Jul 2016 21:44:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba064b98-2b1e-4c48-b4a7-169b00e0ed9aAndrew<p>I don&#39;t know if it will solve your issue, but I would start with migrating away from the alpha SDK and implementing production level SDK 11. You will find you get very little support for SDK 0.9.x</p><div style="clear:both;"></div>