I tried out a ble_app_hrs_freertos_pca10056_s140.emProject and was able to compile but a couple of questions:
- how is heart rate info calculated? where's the sensor even? (sorry for the dumb question but out of curiosity)
- It states here in step 3 that you would be able to read the values for heart, battery services by clicking the Play button, but in the nRF Connect iOS app, I don't see a Play button really. I see services under Advertised Services section where the UUID is shown for each of them but I can't do anything with them
. If you press the buttome as the left figure, you will see the 

