I want to save sensor data to sd card then download to phone with ble.https://devzone.nordicsemi.com/f/nordic-q-a/43766/i-want-to-save-sensor-data-to-sd-card-then-download-to-phone-with-bleHi, I&#39;m trying to save sensor data to sd card on low power mode. When i connect to bluetooth mobile app can pull all data from sd card. How can make this architecture? Thanks..en-USTelligent Community 13Fri, 15 Feb 2019 14:24:48 GMTRE: I want to save sensor data to sd card then download to phone with ble.https://devzone.nordicsemi.com/thread/171421?ContentTypeID=1Fri, 15 Feb 2019 14:24:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67a41a07-9b26-4dbc-afdd-3018cf544b54awneil[quote userid="55906" url="~/f/nordic-q-a/43766/i-want-to-save-sensor-data-to-sd-card-then-download-to-phone-with-ble"]How can make this architecture?[/quote] <p>Standard development approach:</p> <ol> <li>Implement reading the sensor data.</li> <li>Implement SD Card file system (eg, FatFs)</li> <li>Implement BLE data transfer (eg, Nordic UART Service, &quot;NUS&quot;).</li> </ol> <p>Each of these is entirely independent of the others, and there are examples covering each one.</p> <p>The final step is to bring them all together.</p><div style="clear:both;"></div>