https://devzone.nordicsemi.com/f/nordic-q-a/1075/heart-rate-demo-problemsI have the nRF51822 Evaluation kit and put the Heart Rate Demo on the PCA10001 (V2.1.0). When I press Button 0 it doesn&#39;t advertise. I have the module (PCA10000) scanning and can see other BLE in my office but not the Heart Rate Demo. The board programsen-USTelligent Community 13Tue, 22 Jul 2014 20:44:51 GMThttps://devzone.nordicsemi.com/thread/5077?ContentTypeID=1Tue, 22 Jul 2014 20:44:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c8939486-bdb4-42c9-9512-776172cc2eb0Paul Russell<p>Note: To get LED0 to blink I had to do &quot;Erase All&quot; before programming the Soft Device v7.0.0, then open the hrs demo in keil (note path is s110 not ble) and compile/load.</p> <p>After that the MCP with dongle quickly discovered the EK running ble_app_hrs demo (in path s110 not path ble).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/5076?ContentTypeID=1Thu, 05 Dec 2013 10:27:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79ce77a0-0616-4e30-bfb2-4ba2cc1af275Ole Morten<p>I&#39;d recommend you to try running the project in the debugger, and putting a breakpoint in app_error_handler, to see whether any error is caught there.</p> <p>Also make sure to use S110 version 5.2.1 or later, as earlier versions may not be compatible with your chip revision.</p><div style="clear:both;"></div>