Central can't find primary service successfully

RE: Central can't find primary service successfully

anna — Wed, 20 Dec 2017 11:40:44 GMT

Thank you very much .The service uuid is not in a right order .I checked a lot of times but I didn't find it .

RE: Central can't find primary service successfully

Hung Bui — Tue, 19 Dec 2017 12:12:27 GMT

As you can find in Bluetooth Spec (Section 4.4.2 Vol 3 Part G Core spec v4.2) if there isn't any primary service match with the UUID you are looking for you will have Attribute not found error response back. Are you sure it's BLE_GATT_STATUS_ATTERR_INVALID not BLE_GATT_STATUS_ATTERR_ATTRIBUTE_NOT_FOUND ?

Make sure you match the UUID correctly, both the base UUID and service UUID.

I would suggest to use a sniffer and track what actually happens over the air.

RE: Central can't find primary service successfully

anna — Tue, 19 Dec 2017 02:56:24 GMT

I add a log in the function of on_primary_srv_discovery_rsp,

static void on_primary_srv_discovery_rsp(ble_db_discovery_t * const    p_db_discovery,                                const  ble_gattc_evt_t * const p_ble_gattc_evt)
{
                                         
       DB_LOG("[DB]: status is %d\r\n" , p_ble_gattc_evt->gatt_status); 
      if (p_ble_gattc_evt->gatt_status == BLE_GATT_STATUS_SUCCESS) 
      .....
 }

when the central connect to the device successfully ,the central begin to do primary service discovery .I used the project of ble_app_uart_c_s120 .I just changed the base uuid and service uuid .And the central connect to the device through target name .

RE: Central can't find primary service successfully

Hung Bui — Mon, 18 Dec 2017 14:08:20 GMT

When do you read p_ble_gattc_evt->gatt_status ? in which event ?

If it's not in a relevant event, the value of p_ble_gattc_evt->gatt_status doesn't have any meaning.

How did you do primary service discovery ? Please post the snippet of you code when you trigger service discovery.