# i need to use Xbee S2 in API mode, 1 Coordinator and 2 router, how to coding program in arduino

**URL:** <https://forums.digi.com/t/i-need-to-use-xbee-s2-in-api-mode-1-coordinator-and-2-router-how-to-coding-program-in-arduino/21226>\
**Category:** XBee - DigiMesh\
**Tags:** xbee-pro-s2b, arduino-xbee, xbee\
**Created:** [March 30, 2020, 9:45am UTC](https://forums.digi.com/t/i-need-to-use-xbee-s2-in-api-mode-1-coordinator-and-2-router-how-to-coding-program-in-arduino/21226 "2020-03-30T09:45:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Varawut](https://avatars.discourse-cdn.com/v4/letter/v/43a26b/32.png) [@Varawut](https://forums.digi.com/u/Varawut)\
**Post date:** [March 30, 2020, 9:45am UTC](https://forums.digi.com/t/i-need-to-use-xbee-s2-in-api-mode-1-coordinator-and-2-router-how-to-coding-program-in-arduino/21226/1 "2020-03-30T09:45:47Z")

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i need to use Xbee S2 in API mode.i have 1 Coordinator and 2 routers.  
how to coding program in arduino?

//Can anyone guide me how to configure in XCTU-Program  
and how to coding in Arduino to connect between routers and Coordinator.

PLz help

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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:** [March 30, 2020, 9:49am UTC](https://forums.digi.com/t/i-need-to-use-xbee-s2-in-api-mode-1-coordinator-and-2-router-how-to-coding-program-in-arduino/21226/2 "2020-03-30T09:49:58Z")

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Varawut,

You can configure the XBee modules for API mode by either loading on the proper Router API firmware or by setting the ATAP command to 1 or 2 depending on what your Arduino code wants.

Digi Support