How to use HTS to notify temperature instead of indicate ?

[Nivetha]

As per the example, HTS only the "indicate" property is mandatory. But, I want to use Notify and Read property. The example suggests using the intermediate temperature in order to use Notify property in the temperature measurement. Is there any alternative approach to it?

Thanks in advance!

[MartinBL]

Hi,

I'm not sure if I understand your question, but to use notification you can change this line in the function hts_measurement_char_add() ble_hts.c

char_md.char_props.indicate = 1;

to

char_md.char_props.notify = 1;

and to enable reading change this:

attr_md.read_perm  = p_hts_init->hts_meas_attr_md.read_perm;

to e.g. this

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);

If you make these changes though, your device will no longer comply with the HTS profile.

[Nivetha]

Thanks! But this didn't solve the problem. I guess I have to change few more things in the ble_hts.c to have notifications instead of indication property.

[MartinBL]

Are you talking about the Temperature Measurement characteristic in the Health Thermometer service? That should be all you need to enable notification. You won't receive any notification though, before you have also changed the code in on_hts_evt() in main.c to use notification events.

[Nivetha]

yes, I meant the same. I want to use notify, read params just like the battery status to see the temperature.

[Nivetha]

got it working! Thanks! But is this the right way to implement? Are these measurements are still valid by using the notify property? Or should I use the intermediate values characteristic to enable the notify temperature values?

[MartinBL]

I can't see what would be wrong with the measurements. I don't think there is anything wrong with what you are doing.