When I add a new server of my own service I got a problem. when I set
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cccd_md.write_perm);
I can send data to iOS normal,but when I connect to Android 4.4.4(Nexus7 II) it will return error 0x8 (Invalid state)
when I change it to this:
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
Android data sent normal,but will cause service ias(service.immediate_alert) not work and iOS ias not work too.
So please help!
Below is code of mine to add characteristic
static uint32_t my_level_char_add(ble_my_t * p_bas, const ble_my_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_my_level;
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);
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cccd_md.write_perm);
cccd_md.vlen = 1;
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.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_BLE_ASSIGN(ble_uuid, 0xFFE1);
memset(&attr_md, 0, sizeof(attr_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 1;
initial_my_level = 0x0;
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_my_level;
err_code = sd_ble_gatts_characteristic_add(p_bas->service_handle, &char_md,
&attr_char_value,
&p_bas->my_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
return NRF_SUCCESS;
}
