i'm now testing the mlx90640 for use as a thermal cam sensor. first thing i notices when i mounted it was that the image i saw in terminal needed to be inverted. so this feature has been added to test file setup and can be downloaded here: 

https://github.com/jamesdanielv/thermal_cam_mlx90640/blob/master/fullsensorreadToterminal.zip

it is a simple setting

//#define MLX90640_mirror false

the code for it is almost as simple as we just reverse order memory is read from single 32 word line buffer

   for (int i=0; i<24;i++){//this samples and draws entire page of data. sensor is 
  MLX90640_I2CRead(MLX90640_address,  0x0400+32*i,  32, mydata);//read 32 places in memory
  #if MLX90640_mirror == false 
  for (int x = 0 ; x < 32 ; x+=1) //this is normal sensor mode
  #else 
  for (int x = 32 ; x >0 ; x-=1) //this is mirrored sensor mode
  #endif
  { //we compare active one row to see at output
    int testx=(50+mydata[x]-startvalue[x]);
    char outputx=46;
    if (testx>60){outputx=44;}//+
    if (testx>70){outputx=111;}//o
    if (testx>80){outputx=79;}//O
    if (testx>100){outputx=64;}//@
    Serial.print  (outputx);Serial.print(F("  "));
  }