https://devzone.nordicsemi.com/f/nordic-q-a/1556/using-indication-to-send-dataHi We are using indication to send data to make sure master receive all the package.If we didn&#39;t receive the confirm message,what should we do?Should we send it again in appication or the stack will keep sending until receive a confirm message? en-USTelligent Community 13Mon, 10 Feb 2014 12:10:50 GMThttps://devzone.nordicsemi.com/thread/6883?ContentTypeID=1Mon, 10 Feb 2014 12:10:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6816222c-2b92-4ec5-b71e-a07bcd97f1fcOle Morten<p>Not receiving a Confirmation on an Indication would be considered a timeout, as per the Core Specification, Volume 3, part G, section 4.14:</p> <blockquote> <p>If the Attribute Protocol transaction times out, the procedure shall be considered to have failed, and the local higher layer shall be notified. No further GATT procedures shall be performed. A new GATT procedure shall only be performed when a new ATT Bearer has been established.</p> </blockquote> <p>In practice, this means that you must disconnect if this happens, and only retry once a new connection have been established.</p><div style="clear:both;"></div>