https://devzone.nordicsemi.com/f/nordic-q-a/3219/nrf51422-ble-examples-missingThe document nRF51422_Evaluation_Kit_User_Guide_v2.0.pdf says: Locate the Heart Rate demo project found in the folder ARM\Device\Nordic\nrf51422\Board\pca10003\s310\ble_app_hrs\arm. There is no such example after installing nrf51_sdk_v5_2_0_39364en-USTelligent Community 13Tue, 14 Nov 2017 10:43:53 GMT