Transmitting data from ADC over pipe

[Anton Maes]

I'm trying to send data acquired from the ADC and monitor it using the master emulator.

The values I'm getting do not appear to make sense though.

I'm using the BLE_HRS with ADC example discussed here but from looking at the code it only outputs the adc reading on the GPIO port 2.

I've changed the code so that heart_rate is 0

  err_code = ble_hrs_heart_rate_measurement_send(&m_hrs, 0);

Looking at the master emulator the value still seems to jump around:

[00:23:05.4] Received a HandleValueNotification on handle 000E with value 0400

[00:23:06.4] Received a HandleValueNotification on handle 000E with value 1400E942E942E942

[00:23:07.4] Received a HandleValueNotification on handle 000E with value 1400E942E942E942E942

The code appears to be updating the hex file and I've disabled all the usages of sensorsim. Is there something I'm misunderstanding about how the send function works?

[Håkon Alseth]

Hi,

The ble_app_hrs example is tailored towards the HRM profile. For a generic profile, we recommend that you use nAN-36 from our website, and combine it with the updated firmware from that application note: github.com/.../nrf51-ble-app-lbs

Are you receiving in a pattern in your current example? If so, I would assume it's the alteration of the different optional data that can be sent with the HRM profile: developer.bluetooth.org/.../CharacteristicViewer.aspx

This is default behavior in the HRM example. (Every third packet will be equal in length)

Best regards Håkon