# Freescale Microcontroller UART APIs for Programmable XBee Pro ZB S2B devices

**URL:** <https://forums.digi.com/t/freescale-microcontroller-uart-apis-for-programmable-xbee-pro-zb-s2b-devices/15136>\
**Category:** XBee Programamble (S2C & 900 HP)\
**Tags:** serial, pro, s2b, zb, and\
**Created:** [July 17, 2015, 10:23am UTC](https://forums.digi.com/t/freescale-microcontroller-uart-apis-for-programmable-xbee-pro-zb-s2b-devices/15136 "2015-07-17T10:23:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![munirathnam](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@munirathnam](https://forums.digi.com/u/munirathnam)\
**Post date:** [July 17, 2015, 10:23am UTC](https://forums.digi.com/t/freescale-microcontroller-uart-apis-for-programmable-xbee-pro-zb-s2b-devices/15136/1 "2015-07-17T10:23:01Z")

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Hello,

I wanted to write simple code for Sending/Reading API frames to/from the serial port of the Freescale Microcontroller that is present in Programmable XBee Pro ZB S2B Module.

Please help me the information about the APIs those are useful to me for this task.

Thank you.

Regards,  
Muni.

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<div class="post-metadata">

**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:** [September 2, 2015, 2:41pm UTC](https://forums.digi.com/t/freescale-microcontroller-uart-apis-for-programmable-xbee-pro-zb-s2b-devices/15136/2 "2015-09-02T14:41:49Z")

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The sample Chat program does exactly what you want. You can find it in the XBee SDK for the programmable modules.