# For XBee S2C and/or 3 Zigbee(s)... do port expanders work just fine?

**URL:** <https://forums.digi.com/t/for-xbee-s2c-and-or-3-zigbee-s-do-port-expanders-work-just-fine/21459>\
**Category:** XBee & XBee Gateway\
**Tags:** i2c, configuration, port, gpio, xbee\
**Created:** [June 15, 2020, 8:46am UTC](https://forums.digi.com/t/for-xbee-s2c-and-or-3-zigbee-s-do-port-expanders-work-just-fine/21459 "2020-06-15T08:46:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![edunn106](https://avatars.discourse-cdn.com/v4/letter/e/dc4da7/32.png) [@edunn106](https://forums.digi.com/u/edunn106)\
**Post date:** [June 15, 2020, 8:46am UTC](https://forums.digi.com/t/for-xbee-s2c-and-or-3-zigbee-s-do-port-expanders-work-just-fine/21459/1 "2020-06-15T08:46:51Z")

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For XBee S2C and/or 3 Zigbee(s)… do port expanders work just fine (i.e. like this MCP23017 - i2c 16 input/output port expander) ? I can’t imagine how XCTU would see these new ports and allow you to configure the new ports accordingly?

thanks!

🙂

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [June 15, 2020, 8:50am UTC](https://forums.digi.com/t/for-xbee-s2c-and-or-3-zigbee-s-do-port-expanders-work-just-fine/21459/2 "2020-06-15T08:50:40Z")

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Edunn,

I can’t see how that would work as the devices require their own software interface that neither device would understand.