hi
i have added new characteristics on a existing service,and i do not know how to make this characteristics can be change by the smartphone and how to know this characteristics are changed by the smartphone.
the characteristics i added as showed in below.could someone can help me where can i set the characteristics can be changed by the smartphone?
static uint32_t temperature_char_add(ble_bas_t * p_bas, const ble_bas_init_t * p_bas_init) { uint32_t err_code; ble_gatts_char_md_t char_md; ble_gatts_attr_md_t cccd_md; ble_gatts_attr_t attr_char_value; ble_uuid_t ble_uuid; ble_gatts_attr_md_t attr_md; uint8_t initial_temperature; uint8_t encoded_report_ref[BLE_SRV_ENCODED_REPORT_REF_LEN]; uint8_t init_len;
// Add temperature characteristic
if (p_bas->is_notification_supported)
{
memset(&cccd_md, 0, sizeof(cccd_md));
// According to BAS_SPEC_V10, the read operation on cccd should be possible without
// authentication.
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
cccd_md.write_perm = p_bas_init->temperature_char_attr_md.cccd_write_perm;
cccd_md.vloc = BLE_GATTS_VLOC_STACK; //value location
}
memset(&char_md, 0, sizeof(char_md)); //CHARACTERISTICS METE DATA
char_md.char_properties.read = 1;
char_md.char_properties.notify = (p_bas->is_notification_supported) ? 1 : 0;
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 = (p_bas->is_notification_supported) ? &cccd_md : NULL;
char_md.p_sccd_md = NULL;
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_TEMPERATURE_SERVICE);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_bas_init->temperature_char_attr_md.read_perm;
attr_md.write_perm = p_bas_init->temperature_char_attr_md.write_perm;
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
initial_temperature= p_bas_init->initial_temperature;
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 = sizeof(uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len = sizeof(uint8_t);
attr_char_value.p_value = &initial_temperature;
err_code = ble_gatts_characteristic_add(p_bas->service_handle, &char_md,
&attr_char_value,
&p_bas->temperature_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
if (p_bas_init->p_report_ref != NULL)
{
// Add Report Reference descriptor
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_REPORT_REF_DESCR);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_bas_init->temperature_report_read_perm;
BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
init_len = ble_srv_report_ref_encode(encoded_report_ref, p_bas_init->p_report_ref);
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 = init_len;
attr_char_value.init_offs = 0;
attr_char_value.max_len = attr_char_value.init_len;
attr_char_value.p_value = encoded_report_ref;
err_code = ble_gatts_descriptor_add(p_bas->temperature_handles.value_handle,
&attr_char_value,
&p_bas->report_ref_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
}
else
{
p_bas->report_ref_handle = BLE_GATT_HANDLE_INVALID;
}
return NRF_SUCCESS;
}
can we use the function BLE_GAP_CONN_SEC_MODE_SET_OPEN?
i know all the BLE example code has the function to add characteristics ,but it is really hard for fresh man to understand. tks!
