Syntax
static esp_ble_mesh_prov_t prov = {
.uuid = dev_uuid,
.output_size = 0,
.output_actions = 0,
.prov_attention = 0x00,
.prov_algorithm = 0x00,
.prov_pub_key_oob = 0x00,
.prov_static_oob_val = NULL,
.prov_static_oob_len = 0x00,
.flags = 0x00,
.iv_index = 0x00,
};