https://devzone.nordicsemi.com/f/nordic-q-a/5005/module-program-problemI do have a program working perfect on the nRF51 EK with a CA revision chip. If I program the software on a nF51 based module (from e-bay brown PCB) with a C0 revision chip it does program but the code is NOT running since the beacon transmissions areen-USTelligent Community 13Tue, 06 Jan 2015 14:20:07 GMThttps://devzone.nordicsemi.com/thread/17653?ContentTypeID=1Tue, 06 Jan 2015 14:20:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bb9c6b81-cc81-40c4-9814-0108f758949aNguyen Hoan Hoang<p>Were able to run some simple code like blinking LED on the module. Were you able to debug step through the code with the module ? There isn&#39;t much info to really know what wrong perhaps the antenna section of the module does&#39;t work. By blinking a led or something or debug trace your code to be sure that the micro is working.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17652?ContentTypeID=1Tue, 06 Jan 2015 06:26:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28c1d92b-e464-4b60-bd1e-43a304c2d97ePaulHolland<p>I did, using nRF51go studio. I also programmed both hex files using the tool and still it does not work.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17651?ContentTypeID=1Tue, 06 Jan 2015 06:22:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f715bb4-b877-402c-a7ab-e7d6fef6dde9Nguyen Hoan Hoang<p>you need to flash the Softdevice (s110 or s120 or s130) in the module first.</p><div style="clear:both;"></div>