Based on Battery Service I have made my own Service and Characteristics but I have problem with setting Indication. This is how my characteristic add function looks like:
static uint32_t xyz_response_char_add(ble_bws_t * p_bws,
const ble_bws_init_t *p_bws_init)
{
ble_gatts_char_md_t char_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_md_t attr_md;
memset(&cccd_md, 0, sizeof(cccd_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.char_props.notify = 1;
char_md.char_props.indicate = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = &cccd_md;
char_md.p_sccd_md = NULL;
ble_uuid.uuid = 0x0002;
ble_uuid.type = BLE_UUID_TYPE_VENDOR_BEGIN;
memset(&attr_md, 0, sizeof(attr_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 1;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = 0;
attr_char_value.init_offs = 0;
attr_char_value.max_len = CHAR_VAL_LEN;
attr_char_value.p_value = NULL;
return sd_ble_gatts_characteristic_add(p_bws->service_handle,
&char_md,&attr_char_value, &p_bws->response_handles);
}
Uisng nRF Master Control Panel I am able to Read Value of characteristic or enable Notification/Indication, however nor Notification neither Indication works. In application I use
sd_ble_gatts_value_set(params);
to change value of characteristic. The problem is that I have to perform Read Operation to get that value in Control Panel even if Notification/Indication is enabled.