CC2530: Create Star Network with ZStack3.01

Hi,

I need to create a star network instead of mesh for some reason with the latest zstack 3.0.1. Looking for advices about this:

• Can I still create star network with zstack 3?
• What is the max capacity with star network? e.g. how many end devices it can support with say 1 message per 5s?
• Found NWK_MODE_STAR in nwk_globals. But why MAX_NODE_DEPTH is defined to 5 in this mode? Shouldn't it be 1?
• If I use SampleSwitch as a template, what do I have to change to make it a star network?
• I heard from somewhere the end devices need to be in certain distance apart to minimize radio interference. Is it true? Say I need to have 20+ devices in a small room, is it worse than in a large room with distance to each other?
• wifi / bluetooth all use 2.4Ghz frequency. What channels are considered better to avoid interference with other non-zigbee networks?

Appreciate you can share experience with me.

Jim