pallisi

MAX31855 is a great thermocouple ADC that you talk to via digital SPI bus.
Beware one thing with it however, there is no way to switch it "off" so it uses less power... so you may have to design a level-shifted/transistor-switched power domain for it that the MCU can switch on/off if you want to isolate its power draw during periods of "ultra low power" budget.

@timotet 
 
Thank you very much. I managed to make it work by reassigning the pins from the code. I was using wrong schematics that's why I couldn't find the solution. I will soon post the code in order to share it with the community.