https://devzone.nordicsemi.com/f/nordic-q-a/120510/the-data-transmission-in-the-unconnected-stateHi, My requirements are: My essential need is a one-to-one connection between central and peripheral . But when my central receives the specified command to start scanning, I want all the peripheral led lights with matching names to light up. en-USTelligent Community 13Mon, 07 Apr 2025 13:34:54 GMThttps://devzone.nordicsemi.com/thread/530843?ContentTypeID=1Mon, 07 Apr 2025 13:34:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dd1e18c5-a82e-4168-a13b-731211421c7dKenneth<p>Hello,</p> <p>Sorry. This is not something we can help you with.</p> <p>You should find examples in the nRF Connect SDK that show usage of BLE (such as advertisement, scanning and connection). If you need a peripheral device to do something &quot;special&quot; such as turn on LED, then you will need to connect for a short period of time, write to a characteristic that turn on the LED, and then disconnect and scan for the next one.</p> <p>Kenneth</p><div style="clear:both;"></div>