# \#xbee\_s1

**URL:** https://forums.digi.com/tag/3557-tag/3557.md

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## [Star topology with S1 modules + Arduino](https://forums.digi.com/t/star-topology-with-s1-modules-arduino/18917)

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**Author:** [@Mogaraghu](https://forums.digi.com/u/Mogaraghu)\
**Replies:** 1\
**Last updated:** [November 22, 2017, 10:54am UTC](https://forums.digi.com/t/star-topology-with-s1-modules-arduino/18917 "2017-11-22T10:54:55Z")

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I have three XBee S1 modules and all of them fitted on to a Xbee shield which is fitted on a UNO board. What I want to do is : Have one Xbee\_01 as Co-ordinator and the other two Xbee\_02 and Xbee\_03 as End Points. I am …