I’ve continued to have intermittent problems with connectivity on these cameras, so I moved the Chime Pro even closer (closer than the wall wart that supplies power). It’s now less than 6 feet away from the cameras, including an exterior wall (wood framed, not metal or brick) between them. One camera reports an RSSI of -52 dB while the other camera (4 inches closer to the Chime) reports -60 dB. At these signal levels they seem to operate reliably, but having to place a Chime Pro (which reports an RSSI of -27 dB) less than six feet away from the cameras seems a little crazy.