RTD Temperature sensor module

I’d like to build a RTD Temperature sensor module to my smokehouse wireless temperature sensor - made someone a PCB for schematic on openenergymonitor site and could share with me?

BTW. Should I connect pin 11 in LM324 to GND? On schematic it isn’t connected…
Best Regards

Look at the data sheet. You should be able to deduce whether a connection is needed, and to where, from that.