# How split data received from serial port
**URL:** https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686
**Category:** General
**Created:** [11 December 2018 17:45 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686 "2018-12-11T17:45:14Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@antedoro](https://discourse.nodered.org/u/antedoro)
#### Post date: [11 December 2018 17:45 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/1 "2018-12-11T17:45:14Z")
Hi All,
My Node-red is receiving data from Arduino serial port.
The data Arduino is sending cam from this code:
```
Serial.print(rpm_SetPoint);
Serial.print("\t");
Serial.print(angleValue);
Serial.print("\t");
Serial.println(rpmValue);
```
I need to separete every line Arduino is sending in e single value to elaborate separatly.
From Node-Red I write this function:
var output = msg.payload.split("\t");
```
var velimp = parseInt(output[1]);
var angle = parseInt(output[2]);
var vel = parseInt(output[3]);
var msg1 = {payload : velimp};
var msg1 = {payload : angle};
var msg1 = {payload : vel};
return [msg1, msg2, msg3];
```
But don't work
Arduino is correcly connected.
Can you help me to find the mistake.
Vincenzo
---
### Author:  [@ukmoose](https://discourse.nodered.org/u/ukmoose)
#### Post date: [11 December 2018 19:41 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/2 "2018-12-11T19:41:40Z")
attach a debug node to your arduino node to see what Node-RED is receiving
---
### Author:  [@antedoro](https://discourse.nodered.org/u/antedoro)
#### Post date: [12 December 2018 06:43 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/3 "2018-12-12T06:43:58Z")
I get this:
155 90 255
---
### Author:  [@ukmoose](https://discourse.nodered.org/u/ukmoose)
#### Post date: [12 December 2018 09:00 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/4 "2018-12-12T09:00:35Z")
So your string would also appear to contain something else ( i"m guessing a carriage return on the end as `15590255` would be 10 characters.
You use
```auto
var msg1 = {payload : velimp};
var msg1 = {payload : angle};
var msg1 = {payload : vel};
```
but then return
```auto
return [msg1, msg2, msg3];
```
So I'm guessing two of those msg1 should be msg2 and msg3
Also if you are returning like that you need 3 outputs from your function node . If you wish them to be sent as separate messages to the same output see
[https://nodered.org/docs/writing-functions#multiple-messages](https://nodered.org/docs/writing-functions#multiple-messages)
---
### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [12 December 2018 09:40 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/5 "2018-12-12T09:40:56Z")
Also arrays in Javascript start from index 0 not 1...
---
### Author:  [@antedoro](https://discourse.nodered.org/u/antedoro)
#### Post date: [12 December 2018 11:04 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/6 "2018-12-12T11:04:50Z")
Sorry my mistake is very stupid.
I rewritten the code and it's all ok.
Thi is new code:
```
var output = msg.payload.split("\t");
var velimp = parseInt(output[0]);
var angle = parseInt(output[1]);
var vel = parseInt(output[2]);
var msg1 = {payload : velimp};
var msg2 = {payload : angle};
var msg3 = {payload : vel};
return [msg1, msg2, msg3];
```
Last question:
It' possible to do get same results with split function?
Thanks
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [12 December 2018 21:44 UTC](https://discourse.nodered.org/t/how-split-data-received-from-serial-port/5686/7 "2018-12-12T21:44:22Z")
> [@antedoro](#):
>
> possible to get same results with split function?
When programming there are almost always multiple ways of achieving a result. You could use regular expressions here for example. However the clue is in your question. You ask how to split the data up so it is likely that a function called split that splits the data up is likely to be a good match.