XBee 802.15.4 Series 1 - Making Star network

XBee & XBee Gateway XBee - 802.15.4
1

Hello,

I hope somebody can help me to make a star network with XBee module.

I haven’t got any experience on the XBee modules before.
I’m trying to make a star network with XBee series1 modules.

I’m wondering whether it’s possible or not to set the contention access period or guaranteed time slots for each sensor nodes.

If every sensor nodes try to send data to the coordinator node at the same time, how the coordinator node deals with all the data without any loss?

When I check the document, the node will re-transmit data 3 times until the node receive ACK signal. However, I think it’s not enouh to deal with data from many sensor nodes.

Thank you in advance.

2

Yes, you can configure the radios for a Point to point or point to multi-point network topology. See http://www.digi.com/support/kbase/kbaseresultdetl.jsp?id=2187 for info on the addressing options.

No, the XBee 802.15.4 modules and Spec do not provide an option for a guaranteed time slot. You will need to implement an external polling protocol to do that.