https://devzone.nordicsemi.com/f/nordic-q-a/85171/ble-advertisement-messages-lost-between-nrf52-and-iphoneHi, I have an application where I want to send sensor data using advertisement message, and read this message by an iPhone. For test purpose, I am currently transmitting 10 advertisement messages (in &quot;burst&quot;) every 10 second. The iPhone is only readingen-USTelligent Community 13Mon, 28 Feb 2022 13:13:28 GMThttps://devzone.nordicsemi.com/thread/355282?ContentTypeID=1Mon, 28 Feb 2022 13:13:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e749c313-d1b6-46c4-8067-a443b5d4c1a4Kenneth<p>This is due to the way Apple scan for peers, it does not scan continously. You may find some suggested advertisment intervals in chapter 40.5 in the Apple Bluetooth guidelines:<br /><a href="https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf">https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf</a>&nbsp;</p> <p>If you need to transfer data, it is a better idea to connect and transfer data at every given interval.</p> <p>Kenneth</p><div style="clear:both;"></div>