public void TurnOffHouse(char house)
    {
        switch (house)
        {
        case 'A':
            ALight.SetActive(false);
            A = false;
            break;

        case 'B':
            BLight.SetActive(false);
            B = false;
            break;

        case 'C':
            CLight.SetActive(false);
            C = false;
            break;

        default:
            break;
        }
    }
    void Update()
    {
        char c = (char)serial.ReadChar();

        Debug.Log(c);
        if (serial.IsOpen)
        {
            if (!A && c == 'A')
            {
                ALight.SetActive(true);
                A = true;
            }
            if (!B && c == 'B')
            {
                BLight.SetActive(true);
                B = true;
            }
            if (!C && c == 'C')
            {
                CLight.SetActive(true);
                C = true;
            }
        }
    }