I2C sending byte array problem

Projects Networking, Protocols, and Devices
3 
      while (!done) {
        done = radio.read(msg, 4);
        digitalWrite(7, HIGH);
        wait = false;
      }

This code will not compile on the better/newer NRF24 library http://tmrh20.github.io/RF24/index.html,
read() is a void function in this library.

That while loop is not very sensible anyway, silently discarding packets is normally counterproductive.