Gist for http://servuc.github.io/teaching/iot-4.html

superNode.ino

/**
  Licence MIT
  @Servuc
  
  Linked to my teaching http://servuc.github.io/teaching/iot-4.html
  
  Base code to help students :P
*/


// Enable and select radio type attached
#define MY_DEBUG
#define MY_RADIO_NRF24
#define MY_NODE_ID 10 //TODO : SET YOUR ID ! 

#define PIN_ID 8 //For the LED
#include <SPI.h>
#include <MySensors.h>  

#define CHILD_ID 1
//Message to one other node, you should add missing message to adjacent nodes
MyMessage msg(CHILD_ID, V_POSITION);

//Message to indicate to master that sensor light is ON
MyMessage msgToMaster(CHILD_ID, V_LIGHT_LEVEL);

void setup()  
{ 
  Serial.println("Setup : Begin");
  pinMode(PIN_ID, OUTPUT);
  digitalWrite(PIN_ID, LOW);
  digitalWrite(PIN_ID, HIGH);
  delay(500);
  digitalWrite(PIN_ID, LOW);
  Serial.println("Setup : End");
}

void presentation() {
  digitalWrite(PIN_ID, HIGH);
  delay(500);
  digitalWrite(PIN_ID, LOW);
}

void receive(const MyMessage &message) {
  Serial.print("From : ");
  Serial.println(message.sender);
  if( message.type == V_LIGHT_LEVEL && message.sender == 0 ) { //Gateway and light order
    //TODO : Shutdown light, digitalWrite
    
    return;
  }
  if( message.type == V_POSITION ) {
    //TODO : Set on light, digitalWrite
    
    //Send variable 1 to master : Mean light is ON 
    send( msgToMaster.set(1) );
    
    //Display next node message
    char * myNextNode = message.getString();
    Serial.print("End node in path : ");
    Serial.println(myNextNode);
    
    //Message here contains information about next node, contact them
    //TODO : Write other conditions for other nodes.
    //Here we are on node 10, just next to 11, so if 11 is the end, set a message to node 11 with end node 11
    //Here we are on node 10, just next to 12, so if 12 is the end, perhaps send a message to 11

    /**
    For example :
    switch( END ) {
      case XXX :
        UPDATE msg DESTINATION (not msgToMaster !!!)
        send( UPDATE msg WITH end DESTINATION );
        break;
      case YYY :
        UPDATE msg DESTINATION (not msgToMaster !!!)
        send( UPDATE msg WITH end DESTINATION );
        break;
    }*/
  }
}

void loop()      
{     
  delay(5000);
}