simple rf22 radio comms question

Projects Networking, Protocols, and Devices
1

I made some custom pcb's and am now able to communicate using two rf22 radios and two arduino pro mini's 5v.

i have loaded the client and server on them and have succesful comms using the examples.

What I would like to do is just have a pushbutton on one of the server board, and have it light an LED on the client arduino.

I am confused as to how to transmit a digital pushbutton status over this type of communications:

if (!rf22.sendtoWait(data, sizeof(data), SERVER_ADDRESS))
      Serial.println("sendtoWait failed");
    else
    {
      // Now wait for a reply from the server
 //     Serial.println(rf22.lastRssi(), HEX); // of the ACK
      uint8_t len = sizeof(buf);
      uint8_t from;   
      if (rf22.recvfromAckTimeout(buf, &len, 2000, &from))
      {
        Serial.print("got reply from : 0x");
        Serial.print(from, HEX);
        Serial.print(": ");
        Serial.println((char*)buf);
      }
      else
      {
        Serial.println("No reply, is rf22_datagram_server running?");
      }
    }
    delay(500);
  }

I have found this example:

  if( Serial.available() )       // if data is available to read
  {
    val = Serial.read();         // read it and store it in 'val'
  }
  if( val == 'H' )               // if 'H' was received
  {
    digitalWrite(ledpin, HIGH);  // turn ON the LED
  } else { 
    digitalWrite(ledpin, LOW);   // otherwise turn it OFF
  }
  delay(100);                    // wait 100ms for next reading

}

But I haven't been able to figure out how to translate it to the rf22 code.

I also have not been able to find any successful tutorials for a basic thing such as this, if i knew how to transmit basic functions im pretty sure i could take it from there.