# Sometimes no serial response of TX-16Bit Address

**URL:** <https://forums.digi.com/t/sometimes-no-serial-response-of-tx-16bit-address/15312>\
**Category:** XBee - 802.15.4\
**Tags:** xbee\
**Created:** [August 25, 2015, 8:28am UTC](https://forums.digi.com/t/sometimes-no-serial-response-of-tx-16bit-address/15312 "2015-08-25T08:28:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![XBeeUser\_ASI](https://avatars.discourse-cdn.com/v4/letter/x/f4b2a3/32.png) [@XBeeUser\_ASI](https://forums.digi.com/u/XBeeUser_ASI)\
**Post date:** [August 25, 2015, 8:28am UTC](https://forums.digi.com/t/sometimes-no-serial-response-of-tx-16bit-address/15312/1 "2015-08-25T08:28:15Z")

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Hi,

we are sending many broadcast messages from our xbee with an intervall of 100ms, but sometimes (1 of 10) there is no response after a TX-send/16Bit-Address from the xbee module. Even with 3 retries with 500ms delay there is no response. This we can see on the logic analyzer.

Used module:  
Xbee-Pro S1 XBP24-ASI-001J revG  
Baud of 115200  
API-Mode  
frame id is incremented (skip zero)  
Ack is disabled

what we can do to stabilize the sending process 😃 ?

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<div class="post-metadata">

**Author:** ![XBeeUser\_ASI](https://avatars.discourse-cdn.com/v4/letter/x/f4b2a3/32.png) [@XBeeUser\_ASI](https://forums.digi.com/u/XBeeUser_ASI)\
**Post date:** [August 26, 2015, 9:41am UTC](https://forums.digi.com/t/sometimes-no-serial-response-of-tx-16bit-address/15312/2 "2015-08-26T09:41:33Z")

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We tested different baud rates and all rates bus the 115200 are totally stable.

For now we use baud 57600 and it seems to be okay 🙂😃