MiWi has the option to configure a message forwarding node. The message intended for a sleeping node is captured and stored by the message forwarding node. When the sleeping node wakes up, it polls the message forwarding node for any missed messages.
@Ferrero, I'm sure Fred will have a suggestion, too. You can find his class on ZigBee in the CEC archive. I purchased a book that helped me: Building Wireless Sensor Networks bu Rpbert Faludi. Chapter 1 gives you a shopping list. Chapter 2 has you doing your first application. Then it's on to sensors and feedback. Amazon lets you read a lot of this book in the "Look inside this book" link.
?? Fred, do you have implementation suggestions for MiWi if you want the nodes to be battery powered and have long life, but need fairly quick response to commands from the controller? Normally you would turn off the receiver and just listen from time to time, but then you might miss a command from the controller.
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Using a 3D printer, CNC router, and existing powertrain components, a team of engineers is building an electric car from scratch on the floor of the International Manufacturing Technology Show in Chicago this week.
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