# How do you change the properties of a node while the application is running?
**URL:** https://discourse.nodered.org/t/how-do-you-change-the-properties-of-a-node-while-the-application-is-running/60230
**Category:** General
**Created:** [23 March 2022 10:11 UTC](https://discourse.nodered.org/t/how-do-you-change-the-properties-of-a-node-while-the-application-is-running/60230 "2022-03-23T10:11:44Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@chappo\_2](https://discourse.nodered.org/u/chappo_2)
#### Post date: [23 March 2022 10:11 UTC](https://discourse.nodered.org/t/how-do-you-change-the-properties-of-a-node-while-the-application-is-running/60230/1 "2022-03-23T10:11:44Z")
I am using the 'serial in' (node-red-node-serialport) node and would like to change the serial port settings based on information recieved over mqtt.
However, I do not know a way to change the properties of a node while the application is running. Is this possible to do? If so, how is it done?
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [23 March 2022 10:39 UTC](https://discourse.nodered.org/t/how-do-you-change-the-properties-of-a-node-while-the-application-is-running/60230/2 "2022-03-23T10:39:24Z")
It is not possible at this time.
The best you can so for now is...
- have multiple serial nodes setup with a selection of settings & route messages to the desired serial node based on the value set in the MQTT message
OR
- save the MQTT value to ENV VARS & use ENV VARs for the serial port settings (NOTE: env vars are only read on start up so this solution would require you to restart node-red after a change)
How many variations do you expect?
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [22 May 2022 10:39 UTC](https://discourse.nodered.org/t/how-do-you-change-the-properties-of-a-node-while-the-application-is-running/60230/3 "2022-05-22T10:39:47Z")
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