AngelSensor

[Flu-Ger]

AngelSensor is a health armband with heart rate monitor. At least the app is OpenSource and it claims to implement Heart Rate Service, Health Thermometer Service and Battery Service according to the bluetooth standard.

If I deactivate the scanning with UUID (AVOID_SCAN_WITH_UUID = true) the armband is found as Bluetooth SMART (BLE) and seems to work normally. Heart rate can be found and displayed. After a while without connection, it deactivates it, so no more readings unless I activate an additional app that keeps the connection alive.

Yet if I use the default app ((AVOID_SCAN_WITH_UUID = false) it is not found by BLE.

According to bluetoothctl it advertises the following services:

[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 00001809-0000-1000-8000-00805f9b34fb
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180a-0000-1000-8000-00805f9b34fb
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180d-0000-1000-8000-00805f9b34fb
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180f-0000-1000-8000-00805f9b34fb
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 41e1bd6a-9e39-441c-9312-b6e862472480
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 481d178c-10dd-11e4-b514-b2227cce2b54
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 552508f9-24ba-4578-82ba-f6d5987e8c41
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 68b52738-4a04-40e1-8f83-337a29c3284d
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 7cd50edd-8bab-44ff-a8e8-82e19393af10
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 87ef07ff-4739-4527-b38f-b0e228de6ed3
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 902dcf38-ccc0-4902-b22c-70cab5ee5df2
[CHG] Device XX:XX:XX:XX:XX:XX Name: Angel Sensor
[CHG] Device XX:XX:XX:XX:XX:XX Alias: Angel Sensor

Therefore the filtered HRP_SERVICE seems to be within the advertised services.

Any idea where the problem could be?

[jonasoreland]

I don't know what the problem can be.

• Have you tried googling fot the problem ?
• I guess you could make it a type of it's own
• I guess one could implement somekind of keep-connection-alive, does the default app has something like that ?

/Jonas

On Thu, Jul 28, 2016 at 8:02 PM, Flu-Ger notifications@github.com wrote:

(AngelSensor)[http://angelsensor.com/] is a health armband with heart rate monitor. At least the app is OpenSource and it claims to implement Heart Rate Service, Health Thermometer Service and Battery Service according to the bluetooth standard.

If I deactivate the scanning with UUID (AVOID_SCAN_WITH_UUID = true) the armband is found as Bluetooth SMART (BLE) and seems to work normally. Heart rate can be found and displayed. After a while without connection, it deactivates it, so no more readings unless I activate an additional app that keeps the connection alive.

Yet if I use the default app ((AVOID_SCAN_WITH_UUID = false) it is not found by BLE.

According to bluetoothctl it advertises the following services:

[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 00001800-0000-1000-8000-00805f9b34fb [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 00001809-0000-1000-8000-00805f9b34fb [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180a-0000-1000-8000-00805f9b34fb [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180d-0000-1000-8000-00805f9b34fb [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 0000180f-0000-1000-8000-00805f9b34fb [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 41e1bd6a-9e39-441c-9312-b6e862472480 [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 481d178c-10dd-11e4-b514-b2227cce2b54 [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 552508f9-24ba-4578-82ba-f6d5987e8c41 [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 68b52738-4a04-40e1-8f83-337a29c3284d [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 7cd50edd-8bab-44ff-a8e8-82e19393af10 [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 87ef07ff-4739-4527-b38f-b0e228de6ed3 [CHG] Device XX:XX:XX:XX:XX:XX UUIDs: 902dcf38-ccc0-4902-b22c-70cab5ee5df2 [CHG] Device XX:XX:XX:XX:XX:XX Name: Angel Sensor [CHG] Device XX:XX:XX:XX:XX:XX Alias: Angel Sensor

Therefore the filtered HRP_SERVICE seems to be within the advertised services.

Any idea where the problem could be?

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[Flu-Ger]

• I haven't googled too hard yet, I'm more or less a beginner when it comes to Bluetooth (yet?)
• Hmm might be a workaround, maybe under "Experimental HRM devices" a handler that shows all Bluetooth devices? But that seems more like a workaround for debugging but better than patching I guess.
• The official developers sadly have their heads in the sand currently .... one of the community projects has implemented a service that I use in parallel to keep the connection. But that is not too stable yet and more of an experiment than a product. The armband is designed to deactivate its Bluetooth when no communication is going on for long enough to save battery so I guess one has to poll for HR often enough.

Thanks for the great project and fast replies btw. :+1: