How to use CJMCU-IR?

I´m new in this forum so hi everyone.

I have problems wiring and programig th ir thermometer IR CJMUC-IR.

The pins are


RX |O O| GND
TX |O O| NRS
VCC |O O| SWI
GND |O O| VCC

I couldn´t find the data sheet, thats why i´m asking for help.