https://devzone.nordicsemi.com/f/nordic-q-a/15476/my-app-won-t-detect-heartrateserviceHi, I have written some code following an example for my nRF51-DK using a sensor and HeartRateService, but I tried to use some apps and the scan doesn&#39;t seem to see my phone. I tried it with the nRF Connect app and it sees it, and the data looks correcten-USTelligent Community 13Sun, 07 Aug 2016 10:09:01 GMThttps://devzone.nordicsemi.com/thread/59125?ContentTypeID=1Sun, 07 Aug 2016 10:09:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50ff14ef-6bc0-4ca4-afc7-6f0cd9c047bfgianni66<p>Thanks for your answer Collin. If I am to choose raw data, I see 0x020106080946562D48524D00. If I connect to the device, under the client tab I have: -Generic Access with 0x1800 -Generic Attribute with 0x1801 -Heart Rate with 0x180D Choosing the Heart Rate service, the data saw there is correct, but still I can&#39;t seem to be able to detect this service in an external app, so I reckon that the problem lies in the raw data UUID. How can I solve this problem?</p> <p>EDIT: I have solved it, thanks Collin. Just had to add what you said in your answer</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/59124?ContentTypeID=1Mon, 01 Aug 2016 23:14:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a16f4cdd-4fcf-46ce-bd62-26df13024753Collin Mast<p>Ensure that you are advertising the Hear Rate Service in your advertisement (0x180D). If you are using the nRF connect app, you should be able to select <code>RAW</code> on the advertisement data, you should see a field of type 0x03, which should contain that 16-bit UUID</p><div style="clear:both;"></div>