# XBee Series 1 API mode

**URL:** <https://forums.digi.com/t/xbee-series-1-api-mode/1937>\
**Category:** XBee - 802.15.4\
**Created:** [March 6, 2013, 11:04am UTC](https://forums.digi.com/t/xbee-series-1-api-mode/1937 "2013-03-06T11:04:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Torben28](https://avatars.discourse-cdn.com/v4/letter/t/ecb155/32.png) [@Torben28](https://forums.digi.com/u/Torben28)\
**Post date:** [March 6, 2013, 11:04am UTC](https://forums.digi.com/t/xbee-series-1-api-mode/1937/1 "2013-03-06T11:04:49Z")

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Hello,

I`m new here and I do not know how to programm two XBee-modules in API mode. The one of the XBee-module should be the coordinator and the other one the End-Device. The coordinator should communicate with MATLAB and the End-Device with a stm microcontroller. There is the problem: I do not know how to programm the data-frame in MATLAB or the Software for the microcontroller. In transparent-mode I can read or send the serial datas over MATLAB, but not the data frame needed for the API mode.  
Has anybody an idea or a short introduction how to programm this???

Thank you for your help…

Torben

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**Author:** ![16ksa23](https://avatars.discourse-cdn.com/v4/letter/1/aeb1de/32.png) [@16ksa23](https://forums.digi.com/u/16ksa23)\
**Post date:** [September 28, 2013, 11:48pm UTC](https://forums.digi.com/t/xbee-series-1-api-mode/1937/2 "2013-09-28T23:48:56Z")

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Using x-ctu you can program the modules in API mode.  
For 802.15.4 modules, you need to set AP=1(to enable API mode).