Are there any updates on this issue? I have been disconnected for several months now, and finally took the time today to troubleshoot. I followed all of the suggestions above and after I reset the controller, the flow meter paired almost instantly. I thought that must have done the trick, but then about 2 hours later, it was disconnected again. I do have firmware version 632, so maybe I need to go back to 615 somehow? The batteries are brand new and the connection was good. I’m already on my 2nd flow meter after the 1st one died completely and was replaced by warranty.
