getSrcNodeId

[flybrianfly]

If I'm implementing a subscriber, how can I tell whether multiple nodes are sending the same message? For example, if I subscribe to the True Airspeed message as in this example and I have two different nodes with unique IDs publishing this message, how can I differentiate, which node the message came from? I'm thinking of this in terms of a redundant autopilot with multiple air data computers and trying to determine whether all of the air data computers are healthy and, if not, which air data computer is no longer sending messages.