https://devzone.nordicsemi.com/f/nordic-q-a/33457/ble-to-ble-peripheral-comms-without-centralWith the BT 5 extensions, is it now possible for BLE Peripherals to communicate with each other without a Central ? In the envisaged application, one node would be the central point of contact, and all communication would go through it - but can thisen-USTelligent Community 13Tue, 17 Apr 2018 12:51:13 GMThttps://devzone.nordicsemi.com/thread/128638?ContentTypeID=1Tue, 17 Apr 2018 12:51:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:22368615-4ed1-4c59-a4c4-b7aafd358666Martin Lesund<p>Hello Andrew,</p> <p><a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.sds%2Fdita%2Fsoftdevices%2Fs130%2Fble_protocol_stack%2Frole_configuration.html" target="_blank" rel="noopener noreferrer">Here</a> is the documentation of the roles our Softdevice supports.&nbsp;</p> <p>Two peripherals cannot talk to each other directly, that is outside of the<a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.sds%2Fdita%2Fsoftdevices%2Fs130%2Fble_protocol_stack%2Fble_protocol_stack.html&amp;cp=2_3_1_0_9" target="_blank" rel="noopener noreferrer"> BLE protocol </a>specification.</p> <p>You could have a device working as a Central and be connected to all the peripherals (<a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fble_sdk_app_multilink.html&amp;cp=4_0_0_4_1_0_2" target="_blank" rel="noopener noreferrer">like this example</a>) or you could have a device acting as both a <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fexamples_ble_cen_per.html&amp;cp=4_0_0_4_1_1" target="_blank" rel="noopener noreferrer">central/peripheral</a> device.</p> <p>I am not sure what exactly what you want to achieve, so I would appreciate if you could describe it in more depth.</p> <p><em> How many devices? Who should communicate? and so on..</em></p><div style="clear:both;"></div>