/nordic/nordic-blog/b/blog/posts/nordic-semiconductor-nrf51822-firmware-for-backgro#Nordic Semiconductor nRF51822 Firmware for Background Data Recording Updating on https://github.com/scytulip/nrf51-back-rec Design Objective This firmware is designed for low-cost long-time low-power unattended data recording. Low-cost: All en-USTelligent Community 13https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nordic-semiconductor-nrf51822-firmware-for-backgroFri, 31 Oct 2014 19:23:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bcf2c160-77c6-4ffb-9585-4a430b0f5ac8Paul Russell0<p>Same issue. Digging found that Nordic UART Service &quot;nus&quot; isn&#39;t included in SDK6.1.0, but is in experimental project of SDK6.0.0, so I extracted only experimental\ble_app_uart from SDK6.1.0 (nrf51_sdk_v6_0_0_43681.zip):</p> <ul> <li>...\board\pca10001\s110\experimental\ble_app_uart</li> </ul> <p>Then copied ble_nus.c and ble_nus.h to this project:</p> <ul> <li>...\board\pca10001\s110\nrf51-back-rec</li> </ul> <p>It compiles OK now and connects with Andoid App nRF UART v2.0, it seems to run as describes but further testing required to confirm.</p> <img src="https://devzone.nordicsemi.com/aggbug?PostID=761&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nordic-semiconductor-nrf51822-firmware-for-backgroThu, 23 Oct 2014 17:36:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bcf2c160-77c6-4ffb-9585-4a430b0f5ac8patrick.belon0<p>I&#39;m trying to compile however it cannot find ble_nus.h in ..\peri\back_dat.c. Please let me know where I can find this. Thank you. I am using the correct SDK.</p> <img src="https://devzone.nordicsemi.com/aggbug?PostID=761&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">