I purchased it at Ebay http://www.ebay.es/itm/291359439538
It's similar to the one you can find at Sparkfun https://www.sparkfun.com/products/9570 but with the necessary components already integrated and a more friendly breakout
More instructions can be found at http://bildr.org/2011/02/mlx90614-arduino/
https://learn.adafruit.com/using-melexis-mlx90614-non-contact-sensors/wiring-and-test
For photon: https://docs.particle.io/datasheets/core-datasheet/#i2c
Seems to work at 3.3V
The code:
