public void ble_cmd_system_hello()
{
log("ble_cmd_system_hello_id");
byte[] _data = new byte[SIZE_HEADER + 0];
int idx = 0;
// header
_data[idx++] = (byte)ble_dev_types.ble_dev_type_ble|(byte)ble_msg_types.ble_msg_type_cmd|0x0;
_data[idx++] = (byte)(0);
_data[idx++] = (byte)ble_classes.ble_cls_system;
_data[idx++] = (byte)ble_command_ids.ble_cmd_system_hello_id;
// send
Send(new BgApiCommand() { Data = _data }, false);
}