Connecting to a Bluetooth HRM strap?

Hi,

A user of my HRV Analysis App has asked why it can't connect to a BT HRM strap. I assumed that the sensor API prior to CIQ 3.2 would have provided data from any HR source that was connected to the watch. This doesn't appear to be the case.

The latest sensor API now splits out onBoard and Remote sensors and in particular has a sensor technology enum with SENSOR_TECHNOLOGY_BLE defined. I can find no reference in the API documentation or online on how to actually use this technology flag!

So..

1. How can I make the sensor framework provide RR data from a BT source?

2. Further how can I use the SENSOR_TECNOLOGY_* values to allow data to be sourced from either an ANT+ (ie standard) HRM or a BT one?

Many thanks in advance.

David

0 davidmct-g over 5 years ago

PS it appears it is used when you query SensorInfo ie to tell you about connected devices

0 jim_m_58 over 5 years ago in reply to davidmct-g

With BLE, the strap can probably only be connected to one thing at a time. Could the user be connected to it with a phone or something?

0 davidmct-g over 5 years ago in reply to jim_m_58

I'll ask. He said that it worked fine with other apps. Do I need to compile for min CIQ 3.2?

0 jim_m_58 over 5 years ago in reply to davidmct-g

If you're just using it as a standard sensor, and if you aren't using the BluetoothLowEnergy module, no..

BT is typically one to one, so if it's connected to another app, the garmin won't connect.

0 davidmct-g over 5 years ago in reply to jim_m_58

Hi,

Did you mean a separate device? The apps I referred to are other Garmin app store apps.

Regards,

David

0 jim_m_58 over 5 years ago in reply to davidmct-g

Are you just using the HRM as a standard sensor? What type of app are you building? Widget or device app?

0 davidmct-g over 5 years ago in reply to jim_m_58

Hi ,

It's an existing device app that has been working fine for a long time with ANT+ sensors.

Regards,

David

0 jim_m_58 over 5 years ago in reply to davidmct-g

Just tried one of my apps with a BLE HRM and it's working fine. How are you enabling things currently?

Here's how I do it:

Sensor.setEnabledSensors([Sensor.SENSOR_HEARTRATE,Sensor.SENSOR_TEMPERATURE,Sensor.SENSOR_FOOTPOD]);

Note that I enable all at the same time. If you enable sensors one at a time, only the last enabled is used.

0 davidmct-g over 5 years ago in reply to jim_m_58

Hi Jim,

I do it the same way. Just waiting on user feedback.

Thanks for the suggestions

Regards, David