Health Thermometer not working

RE: Health Thermometer not working

oneguy — Tue, 15 Dec 2015 11:08:21 GMT

Hi,

So in services_init () I changed

BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&hts_init.hts_meas_attr_md.cccd_write_perm);

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&hts_init.hts_meas_attr_md.cccd_write_perm);

and all works fine.

RE: Health Thermometer not working

oneguy — Fri, 11 Dec 2015 11:43:40 GMT

Hi Anders,

I will try and get back to you as soon as possible. Thank you for your help so far.

RE: Health Thermometer not working

oneguy — Mon, 07 Dec 2015 10:30:49 GMT

What happens on MCP (Android version): a) for Indications that I can enable: I click on the up/down arrow (on the right of the respective Characteristic name). The up/down arrow gets crossed out and 0x2902 changes to "Indications enabled" b) for my HTS service that doesn't work: nothing happens when I click on the up/down arrow.

RE: Health Thermometer not working

Anders Strand — Mon, 07 Dec 2015 10:01:34 GMT

Why can't you enable indications? Are you using MCP for Android or Windows?

RE: Health Thermometer not working

oneguy — Fri, 04 Dec 2015 08:59:05 GMT

Hmmm. I did quite a bit of debugging... :-(.

I have just enabled the code again and used the nRF Master Control to see if HTS is working. Unfortunately not.

However I note that I cannot enable Indications on the nRF Master Control. Maybe this helps to find the problem?

RE: Health Thermometer not working

Anders Strand — Fri, 04 Dec 2015 08:31:19 GMT

I see that you have commented out this;

//        case BLE_GATTS_EVT_SYS_ATTR_MISSING:
//            err_code = sd_ble_gatts_sys_attr_set (m_conn_handle, NULL, 0, BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS | BLE_GATTS_SYS_ATTR_FLAG_USR_SRVCS);
//            APP_ERROR_CHECK (err_code);
//            break;

Why is it commented out?

RE: Health Thermometer not working

oneguy — Fri, 04 Dec 2015 07:10:16 GMT

Stack.c is attached to the original post.

RE: Health Thermometer not working

Anders Strand — Thu, 03 Dec 2015 13:44:19 GMT

Can you post you code?

RE: Health Thermometer not working

oneguy — Thu, 03 Dec 2015 10:32:38 GMT

Hi, thanks for your reply. So, for my tests I'm using HTS-capable Apps (e.g. nRF Toolbox, BLE Scanner and others) which enable indications on relevant characteristics. Still doesn't work...

RE: Health Thermometer not working

Anders Strand — Thu, 03 Dec 2015 10:07:48 GMT

Hi.

The error code is BLE_ERROR_GATTS_SYS_ATTR_MISSING. This means that the softdevice does not know the system attributes for that characteristic. The system attributes are in practice only the cccd (Client Characteristic Configuration Descriptor). value. This is 1 when notifications are enabled, and zero otherwise.

You are returned this error because the softdevice does not know the state of the System Attributes. It will communicate this to you by returning this error, but also by sending you the BLE event BLE_GATTS_EVT_SYS_ATTR_MISSING. If you have not stored the system attributes from a previous connection (normal when bonding), you can handle this event by adding this to on_ble_evt:

case BLE_GATTS_EVT_SYS_ATTR_MISSING:
        // No system attributes have been stored.
        err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
        APP_ERROR_CHECK(err_code);
        break;

See the documentation for sd_ble_gatts_sys_attr_set here.

I see that in the ble_app_template project, this is already implemented.

The solution for you will be to check if notifications are enabled on the characteristic, before attempting to send data on it.

err_code = ble_hts_is_indication_enabled(&m_hts, &is_indication_enabled);
APP_ERROR_CHECK(err_code);
if (is_indication_enabled)
{
    temperature_measurement_send();
}

UPDATE 1: I tried this myself using the hts example from the SDK. When i click the up/down arrow, it works for a while. Then i see that it says Value: Indications enabled under "Descriptors". When i press button_0, i receive a temperature. Are you sure that temperature_measurement_sendis called in your application?

RE: Health Thermometer not working

oneguy — Wed, 02 Dec 2015 13:01:13 GMT

The error code is 13313.

Thanks

RE: Health Thermometer not working

Anders Strand — Wed, 02 Dec 2015 10:10:42 GMT

Hi. Can you check what error code ble_hts_measurement_send returns ?