# A simple programming problem

**URL:** https://forums.digi.com/t/a-simple-programming-problem/3029
**Category:** XCTU
**Created:** [March 22, 2012, 7:26pm UTC](https://forums.digi.com/t/a-simple-programming-problem/3029 "2012-03-22T19:26:28Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![cjm75](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cjm75](https://forums.digi.com/u/cjm75)
#### Post date: [March 22, 2012, 7:26pm UTC](https://forums.digi.com/t/a-simple-programming-problem/3029/1 "2012-03-22T19:26:28Z")

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I am trying to use X-CTU to make a program. I just want xbee to send signals only when the input changes. How can I realize this?  
Thanks!

by the way, the xbee chip I use is XB24-AUI-001…

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### Author: ![spastor](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@spastor](https://forums.digi.com/u/spastor)
#### Post date: [April 2, 2012, 8:03pm UTC](https://forums.digi.com/t/a-simple-programming-problem/3029/2 "2012-04-02T20:03:33Z")

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Hello cjm75,

The XBee you have seems to be non-programmable, so it wouldn’t be possible with it. You should get a programmable XBee or drive the non-programmable with an arduino, pic or another microcontroller.