# How to concat a buffer

**URL:** <https://discourse.nodered.org/t/how-to-concat-a-buffer/5516>\
**Category:** General\
**Created:** [5 December 2018 22:55 UTC](https://discourse.nodered.org/t/how-to-concat-a-buffer/5516 "2018-12-05T22:55:16Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![aargollo](https://avatars.discourse-cdn.com/v4/letter/a/58f4c7/32.png) [@aargollo](https://discourse.nodered.org/u/aargollo)\
**Post date:** [29 December 2018 17:53 UTC](https://discourse.nodered.org/t/how-to-concat-a-buffer/5516/21 "2018-12-29T17:53:58Z")

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Hi Andrei, sorry for my delay. I have traveles last week!  
thanks a lot for your help and advices.  
In response for your answers, I using Zigate to building a home automation gateway using node-red.  
I'll using this flow to salve special variables necessaries to implement a Zigbee commisioning procedure and to do it is necessary to get the nwk short address from specific Zigbee message and send it after.

We can sharing experiences about it!

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