https://devzone.nordicsemi.com/f/nordic-q-a/45819/sending-data-over-ble-uart-tx-characteristics-to-an-access-pointOnl I have 40 kb of data i need to send, and what i thought was using notification by creating a timer, which will be started as soon as device gets connected, in the timeout handler i will convert every data to string using sprintf 7 send inen-USTelligent Community 13Fri, 05 Apr 2019 13:09:51 GMThttps://devzone.nordicsemi.com/thread/180508?ContentTypeID=1Fri, 05 Apr 2019 13:09:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3cef6cf7-e51b-42de-81c2-0016e9863212awneil<p>Again, look at the SDK examples.</p> <p>They illustrate how to use the NUS API function calls.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/180468?ContentTypeID=1Fri, 05 Apr 2019 10:37:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b7accc8-de53-4af6-a62c-2bd601a1e3e8Manjunath K S<p>can u please help me with that understanding not able to follow how to get to know the status u are talking about.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/180467?ContentTypeID=1Fri, 05 Apr 2019 10:35:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e531a082-d167-4650-872f-9e4c8dcc3546awneil<p>Take a look at how the SDK example does it ...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/180465?ContentTypeID=1Fri, 05 Apr 2019 10:30:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7e332e15-9420-4faf-99d5-1e1f0bfa8131Manjunath K S<p>Which status i need to check , can u explain me in detail.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/180464?ContentTypeID=1Fri, 05 Apr 2019 10:28:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:63e91ae4-70b2-452f-87e4-4580b737d1f7awneil<p>There&#39;s no need to use printf - NUS can handle raw binary data.</p> <p>Relying on blind timers is never a good thing - uses the status return from NUS to know when it is ready to accept more data</p><div style="clear:both;"></div>