https://devzone.nordicsemi.com/f/nordic-q-a/25634/nrf52-reboots-constantly-when-i-add-uartI am using the ble_app_uart example from SDK13 and something strange is happening. The code without UART part works nice and I can see in RTT that it can discover every beacon in the room and it seems it works perfectly. However, when I try to add UARTen-USTelligent Community 13Wed, 04 Oct 2017 12:55:00 GMThttps://devzone.nordicsemi.com/thread/101012?ContentTypeID=1Wed, 04 Oct 2017 12:55:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5bc9c729-b51c-4cd6-ab7b-33041fec3ac9caram5555<p>Hi.</p> <p>Have you checked uart_event_handle(...) ?</p> <p>Remove case clause for APP_UART_COMMUNICATION_ERROR, APP_UART_FIFO_ERROR</p> <p>Regards.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/101014?ContentTypeID=1Wed, 04 Oct 2017 09:30:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:40b4b702-42b3-40fd-ad7e-32c364da0dc2Sigurd<p>Note that the reason why the device reboots is because you are running into the error handler(<code>APP_ERROR_CHECK(err_code)</code>) where the default behavior is to do a reset.</p> <p>When the device is constantly rebooting, you should debug in order to find the reason for the reset. See <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/">this post</a> about debugging.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/101013?ContentTypeID=1Wed, 04 Oct 2017 09:27:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5fa779c0-c6cf-44df-8b0e-83e458df7b28Sigurd<p>Hi,</p> <p>You have removed the function <code>db_discovery_init()</code>, so when you later try to initialize the NUS Client module in <code>nus_c_init()</code>, you get the error code <code>NRF_ERROR_INVALID_STATE</code> because the <em>Database Discovery Module</em> is not initialized.&#39;</p><div style="clear:both;"></div>