title_body: FS RX2A Pro Receiver Not Working
upvoted_answer: You mentioned that you tried SBUS, but that receiver only supports PPM and IBUS (not SBUS).  Try setting your flight controller to use IBUS.  As for the RX getting hot - I'm not sure about that.  The photo on banggood shows that it takes VCC, but be careful.  The description details indicate that it only accepts 3.3 - 5 volts for voltage.  If your using anything more than a 1S Lipo, you will certainly fry the RX unless you have it soldered to either a 3.3V or 5V pad.
  
  Here is the protocol and voltage information from Banggood.
  
  Signal output: IBUS, PPM
  
  Power input: 3.3-5V