Measurement Request

| Data byte | Description                                                                                                                                                           | 
 | :---------: | -----------                                                                                                                                                           | 
 | 0         | Zero indicates all measurements supported by node should be sent (as separate events). Non-zero indicates a node specific index specifying which measurement to send. | 
 | 1         | Zone for which event applies to (0-255). 255 is all zones.                                                                                                            | 
 | 2         | Sub-zone for which event applies to (0-255). 255 is all sub-zones.                                                                                                    | 
