https://devzone.nordicsemi.com/f/nordic-q-a/41819/ble-data-transmission-interval-is-strangeHi!! I am sending data by BLE data received by SPI. The interval for sending data at BLE is 64 ms. I have written and run NRF_SPI 1 -&gt; ENABLE = 0; and NRF_SPI 1 -&gt; ENABLE = 1; However, when commenting out afterwards and letting run again withen-USTelligent Community 13Fri, 21 Dec 2018 09:53:44 GMThttps://devzone.nordicsemi.com/thread/162810?ContentTypeID=1Fri, 21 Dec 2018 09:53:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81659871-5d05-4c3e-87db-4955e01e27f0Kaito<p>thank you for your reply!</p> <p>I understood the cause!</p> <p><span lang="en">The cause was in the connection interval.</span></p> <p><span lang="en">Based on Apple documentation set the minimum connection interval to 800 ms and the maximum connection interval to 1 second.</span></p> <p><span lang="en">When it changed the minimum connection interval to 40 ms and the maximum connection interval to 80 ms, it was able to transmit data without breakin the connection of BT!!</span></p> <p><span lang="en">&nbsp;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/162799?ContentTypeID=1Fri, 21 Dec 2018 09:12:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:29b093a2-9ce0-4935-899b-59cefc851a5aEdvin<p>Hello,</p> <p>I feel that there is some information missing here. How do you maintain the 64ms interval? Do you use a timer? What is your connection interval? I guess the source code would explain a lot.</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>