# How do i use another serial to send data from arduino to processing?

**URL:** https://discourse.processing.org/t/how-do-i-use-another-serial-to-send-data-from-arduino-to-processing/12595
**Category:** Electronics (Arduino, etc.)
**Created:** [July 8, 2019, 6:34pm UTC](https://discourse.processing.org/t/how-do-i-use-another-serial-to-send-data-from-arduino-to-processing/12595 "2019-07-08T18:34:32Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![diazdaiz](https://avatars.discourse-cdn.com/v4/letter/d/bc8723/32.png) [@diazdaiz](https://discourse.processing.org/u/diazdaiz)
#### Post date: [July 8, 2019, 6:34pm UTC](https://discourse.processing.org/t/how-do-i-use-another-serial-to-send-data-from-arduino-to-processing/12595/1 "2019-07-08T18:34:32Z")

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i am using arduino teensy and i want to send data to processing using another serial, how do i write it in processing?  
i am following this tutorial: [https://www.youtube.com/watch?v=NhyB00J6PiM](https://www.youtube.com/watch?v=NhyB00J6PiM)  
but in my case, i need to use another serial, because Serial.begin already used for big program, so for example i need to use Serial2.begin(9600)  
arduino code:

```auto
void setup() {
  Serial.begin(115200); // already used 
  Serial2.begin(9600); // processing
}
void loop() {
  Serial.println("...") //big code that i am not allow to change
  Serial2.println("hello world");
  delay(1000);
}

```

so how do i get Serial2.println value instead of Serial.println in processing

---

<div class="post-metadata">

### Author: ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)
#### Post date: [July 9, 2019, 12:58am UTC](https://discourse.processing.org/t/how-do-i-use-another-serial-to-send-data-from-arduino-to-processing/12595/2 "2019-07-09T00:58:06Z")

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i think this is a Teensy hardware question,  
the 3.x models have 3 add UARTs to the default USB port ( and serial.print() )  
to access the others need to find the port - pins  
UART Serial2 ( 9 - RX2 / 10 TX2 )  
and connect some hardware

> # USB to TTL Serial Cable - Debug / Console Cable

to be able to connect it to a PC USB port ( check on 5v or 3V5 version? )