test.ino

();
    Serial.print("Sending:");
    Serial.print(message);
    Serial.print(" ");
    radio.write( &message, 1 );
    
    // Now, continue listening
    radio.startListening();

    // Wait here until we get a response, or timeout (250ms)
    unsigned long started_waiting_at = millis();
    bool timeout = false;
    while ( ! radio.available() && ! timeout )
      if (millis() - started_waiting_at > 200 )
        timeout = true;

    // Describe the results
    if ( timeout )
    {
      Serial.println("Failed, response timed out.");
      
    }
    else
    {
      // Grab the response, compare, and send to debugging spew
      byte response;
      radio.read( &response, sizeof(response) );
      Serial.print("Transmitter. Received response from receiver:");
      Serial.println(response,BIN);
      
      if (response == B0) 
      {
        digitalWrite(led_pin,HIGH);
        Serial.println("Ok");
      }
      else
      {
        digitalWrite(led_pin,LOW);
        Serial.println("No connection");
      }
    }

    // Try again  later
    delay(150);