if (buffer_gree[0] == 49 && buffer_gree[1] == 32)
{
    Temp_SET = buffer_gree[6] - 40;
    Temp_ROOM = buffer_gree[7] - 40;
    Temp_Freon_internal = buffer_gree[9] - 40;
    if (buffer_gree[3] == 20) label12.Text = "HEAT";
    if (buffer_gree[3] == 17) label12.Text = "COOL";
    if (buffer_gree[3] == 19) label12.Text = "VENTILATION";
        if (buffer_gree[4] == 1) label11.Text = "FAN 1";
    if (buffer_gree[4] == 2) label11.Text = "FAN 2";
    if (buffer_gree[4] == 3) label11.Text = "FAN 3";
    if (buffer_gree[4] == 4) label11.Text = "TURBO";
    if (buffer_gree[4] == 128) label11.Text = "FAN OFF ";
}