title_body: r-xsr won't bind to qx7s I'm trying to bind an r-xsr to a qx7s, but the receiver shows a solid red, green and blue light and won't bind.
  
  I have updated the receiver to version 2.1.0 LBT and the transmitter to the EU version of OpenTX 2.3.7.
  
  Is there a known problem with any of this firmware, or is there another problem?
upvoted_answer: Okay, I solved it: I had installed the EU version of OpenTX, but I hadn't flashed the internal module on the transmitter. When I did that it worked flawlessly.