https://devzone.nordicsemi.com/f/nordic-q-a/47894/problem-in-init-esb-serviceHi Bro I have a project need to use BLE + ESB Concurrently, actually I have did it in my previous project but seems it has problem in new SDK In my old project: SDK11, S132 , nrf52832, its work sucessfully Now, I use SDK15.3.0, S132, nrf52832en-USTelligent Community 13Wed, 29 May 2019 14:20:54 GMThttps://devzone.nordicsemi.com/thread/189924?ContentTypeID=1Wed, 29 May 2019 14:20:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc684e3a-bf5f-4da4-81e0-628cd820ac3cSigurd<p>Hi,</p> [quote userid="79080" url="~/f/nordic-q-a/47894/problem-in-init-esb-service"]2 function also get error code in &quot; APP_ERROR_CHECK(err_code);&quot; and program reset.[/quote] <p>What is the value of err_code? What function returned the error code ?</p> <p>If the&nbsp;preprocessor symbol DEBUG is defined, the device will not reset when it encounters an error, and the error code will instead be printed with nrf_log (with either UART or RTT as backend). If you use SES IDE, just change the project configuration from release to debug. If you are on Keil, you need add DEBUG as a&nbsp;preprocessor symbol.</p><div style="clear:both;"></div>