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This is a very basic BLE example for DELTA DFBM-NQ620 and DELTA DFCM-NNN50 platforms. This example is doing HRM (Heart Rate Monitor) application, the service spec can be found in here Once compiled and download to DELTA platforms, the module start advertising while LED1 is blinking. User can download the APP 'nRF Connect' available in both App Store and Google Play to scan the adverting and connect to the module.
Note that printf use the baudrate 9600 8n1 as default. In Windows, user could find the ready to use com port number in Device Manager and shown as 'mbed Serial Port(COM#)'
