How is the health model supposed to work? I'm currently doing some tests with the light switch example and I don't really understand the different roles of the nodes in the health model. Does the health client send a request to get an update? Or do the servers publish their status periodically? Also, I found that if I restart one of the servers, it's health model stops sending updates, how can I make this work again (without erasing the flash every time ;) )
