diff --git a/RF24Network.cpp b/RF24Network.cpp
index 900c230..d5160d1 100644
--- a/RF24Network.cpp
+++ b/RF24Network.cpp
@@ -50,53 +50,60 @@ void RF24Network::begin(uint8_t _channel, uint16_t _node_address )
 
 /******************************************************************/
 
-void RF24Network::update(void)
+void RF24Network::update(uint8_t pipe_num)
 {
-  // if there is data ready
-  uint8_t pipe_num;
-  while ( radio.available(&pipe_num) )
+  // Dump the payloads until we've gotten everything
+  boolean done = false;
+  while (!done)
   {
-    // Dump the payloads until we've gotten everything
-    boolean done = false;
-    while (!done)
-    {
-      // Fetch the payload, and see if this was the last one.
-      done = radio.read( frame_buffer, sizeof(frame_buffer) );
+    // Fetch the payload, and see if this was the last one.
+    done = radio.read( frame_buffer, sizeof(frame_buffer) );
 
-      // Read the beginning of the frame as the header
-      const RF24NetworkHeader& header = * reinterpret_cast<RF24NetworkHeader*>(frame_buffer);
+    // Read the beginning of the frame as the header
+    const RF24NetworkHeader& header = * reinterpret_cast<RF24NetworkHeader*>(frame_buffer);
 
-      IF_SERIAL_DEBUG(printf_P(PSTR("%lu: MAC Received on %u %s\n\r"),millis(),pipe_num,header.toString()));
-      IF_SERIAL_DEBUG(const uint16_t* i = reinterpret_cast<const uint16_t*>(frame_buffer + sizeof(RF24NetworkHeader));printf_P(PSTR("%lu: NET message %04x\n\r"),millis(),*i));
+    IF_SERIAL_DEBUG(printf_P(PSTR("%lu: MAC Received on %u %s\n\r"),millis(),pipe_num,header.toString()));
+    IF_SERIAL_DEBUG(const uint16_t* i = reinterpret_cast<const uint16_t*>(frame_buffer + sizeof(RF24NetworkHeader));printf_P(PSTR("%lu: NET message %04x\n\r"),millis(),*i));
 
-      // Throw it away if it's not a valid address
-      if ( !is_valid_address(header.to_node) )
-	continue;
+    // Throw it away if it's not a valid address
+    if ( !is_valid_address(header.to_node) )
+      continue;
 
-      // Is this for us?
-      if ( header.to_node == node_address )
-	// Add it to the buffer of frames for us
-	enqueue();
-      else
-	// Relay it
-	write(header.to_node);
+    // Is this for us?
+    if ( header.to_node == node_address )
+      // Add it to the buffer of frames for us
+      enqueue();
+    else
+      // Relay it
+      write(header.to_node);
 
-      // NOT NEEDED anymore.  Now all reading pipes are open to start.
+    // NOT NEEDED anymore.  Now all reading pipes are open to start.
 #if 0
-      // If this was for us, from one of our children, but on our listening
-      // pipe, it could mean that we are not listening to them.  If so, open up
-      // and listen to their talking pipe
-
-      if ( header.to_node == node_address && pipe_num == 0 && is_descendant(header.from_node) )
-      {
-	uint8_t pipe = pipe_to_descendant(header.from_node);
-	radio.openReadingPipe(pipe,pipe_address(node_address,pipe));
-
-	// Also need to open pipe 1 so the system can get the full 5-byte address of the pipe.
-	radio.openReadingPipe(1,pipe_address(node_address,1));
-      }
-#endif
+    // If this was for us, from one of our children, but on our listening
+    // pipe, it could mean that we are not listening to them.  If so, open up
+    // and listen to their talking pipe
+
+    if ( header.to_node == node_address && pipe_num == 0 && is_descendant(header.from_node) )
+    {
+      uint8_t pipe = pipe_to_descendant(header.from_node);
+      radio.openReadingPipe(pipe,pipe_address(node_address,pipe));
+
+      // Also need to open pipe 1 so the system can get the full 5-byte address of the pipe.
+      radio.openReadingPipe(1,pipe_address(node_address,1));
     }
+#endif
+  }
+}
+
+/******************************************************************/
+
+void RF24Network::update(void)
+{
+  // if there is data ready
+  uint8_t pipe_num;
+  while ( radio.available(&pipe_num) )
+  {
+    update(pipe_num);
   }
 }
 
diff --git a/RF24Network.h b/RF24Network.h
index 4e8652a..2e008d5 100644
--- a/RF24Network.h
+++ b/RF24Network.h
@@ -105,6 +105,22 @@ class RF24Network
    * the action happens!
    */
   void update(void);
+    
+  /**
+   * Alternative main layer loop when used in combination with interrupts.
+   *
+   * This function must be called when an interrupt is triggered and data
+   * is received. It behaves exactly as update(), but it will not loop through
+   * all pipes, but only the specified one. This way, you can keep your interrupt
+   * routine short.
+   *
+   * (To be honest, pipe_num is only used to print debug information. It is not 
+   * used for any other purposes.)
+   *
+   * @warning Only use it in combination with interrupts!
+   * @see RF24::whatHappened()
+   */
+  void update(uint8_t pipe_num);
 
   /**
    * Test whether there is a message available for this node