This is the fork we're using: https://github.com/TMRh20/RF24 Could you create an issue for TMRh20 here: https://github.com/TMRh20/RF24/issues?state=open

I would think you could do this by setting up a sensor as a switch. Another one would be set up to communicate with the first instead of sending to the gateway. The first one is made to set itself as "off"(no presence) on the gateway if it hasn't received a ping from the actual presence sensor in the past, say, 5 seconds. When it does see a ping, switch set to on.