write only characteristic?

[victor]

Hi, how to create a write only characteristic?

I have tried: ble_char_md.char_props.read = 0;

This does not work.

[victor]

My complete code for creating the characteristic:

	{
	/* ATT metadata */
	ble_gatts_attr_md_t ble_attr_md;

	memset(&ble_attr_md, 0, sizeof(ble_attr_md));

	/* No security is required whatsoever, needs to be changed when encryption
		        is added */
	ble_attr_md.read_perm.lv = 1;
	ble_attr_md.read_perm.sm = 1;
	ble_attr_md.write_perm.lv = 1;
	ble_attr_md.write_perm.sm = 1;

	ble_attr_md.vloc = BLE_GATTS_VLOC_STACK;
	ble_attr_md.rd_auth = 0;
	ble_attr_md.wr_auth = 0;
	ble_attr_md.vlen = 0;

	/* BLE GATT metadata */
	ble_gatts_char_md_t ble_char_md;

	memset(&ble_char_md, 0, sizeof(ble_char_md));

	ble_char_md.p_char_pf = NULL;
	ble_char_md.char_props.read = 0;
	ble_char_md.char_props.write = 1;
	ble_char_md.char_props.write_wo_resp = 1;
	ble_char_md.char_props.notify = 0;

	ble_char_md.p_cccd_md = NULL;
	ble_char_md.p_sccd_md = NULL;
	ble_char_md.p_char_user_desc = NULL;
	ble_char_md.p_user_desc_md = NULL;
	uint8_t name[]="Crypto key";
	ble_char_md.p_char_user_desc = name;
	ble_char_md.char_user_desc_size=strlen((const char*)name);
	ble_char_md.char_user_desc_max_size=strlen((const char*)name);

	/* ble characteristic UUID */
	ble_uuid_t ble_uuid;

	ble_uuid.type = mesh_base_uuid_type;
	ble_uuid.uuid = MESH_AES_KEY_UUID;

	/* ble attribute */
	ble_gatts_attr_t ble_attr;

	memset(&ble_attr, 0, sizeof(ble_attr));

	uint8_t key[16]={0};

	ble_attr.init_offs = 0;
	ble_attr.init_len = 16;
	ble_attr.max_len = 16;
	ble_attr.p_attr_md = &ble_attr_md;
	ble_attr.p_uuid = &ble_uuid;
	ble_attr.p_value = (uint8_t*)&key;

	/* add to service */
	ble_gatts_char_handles_t ble_value_char_handles;

	error_code = sd_ble_gatts_characteristic_add(
			g_mesh_service.service_handle,
			&ble_char_md,
			&ble_attr,
			&ble_value_char_handles);

}

When connecting with master control I can write some data and then read the data. I do not want to be able to read the data.