# Can the XBee ZB SMT RF "Programmable" be used without developing and programming firmware onto the added processor

**URL:** <https://forums.digi.com/t/can-the-xbee-zb-smt-rf-programmable-be-used-without-developing-and-programming-firmware-onto-the-added-processor/14185>\
**Category:** XBee Programamble (S2C & 900 HP)\
**Tags:** programmable, zb, rf, module, zigbee\
**Created:** [January 15, 2015, 8:00am UTC](https://forums.digi.com/t/can-the-xbee-zb-smt-rf-programmable-be-used-without-developing-and-programming-firmware-onto-the-added-processor/14185 "2015-01-15T08:00:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![charlvnk](https://avatars.discourse-cdn.com/v4/letter/c/90ced4/32.png) [@charlvnk](https://forums.digi.com/u/charlvnk)\
**Post date:** [January 15, 2015, 8:00am UTC](https://forums.digi.com/t/can-the-xbee-zb-smt-rf-programmable-be-used-without-developing-and-programming-firmware-onto-the-added-processor/14185/1 "2015-01-15T08:00:44Z")

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UART connections not routed to outside, but via internal MC9SO8QE processor.

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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:** [January 26, 2015, 2:48pm UTC](https://forums.digi.com/t/can-the-xbee-zb-smt-rf-programmable-be-used-without-developing-and-programming-firmware-onto-the-added-processor/14185/2 "2015-01-26T14:48:17Z")

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If you follow the steps outlined in the product manual for bypassing the bootloader then you can. Otherwise you really need to load the serial bypass application on the processor.