# Serial Port RS485 question

**URL:** <https://discourse.nodered.org/t/serial-port-rs485-question/37817>\
**Category:** General\
**Created:** [20 December 2020 22:01 UTC](https://discourse.nodered.org/t/serial-port-rs485-question/37817 "2020-12-20T22:01:51Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![UnborN](https://avatars.discourse-cdn.com/v4/letter/u/4491bb/32.png) [@UnborN](https://discourse.nodered.org/u/UnborN)\
**Post date:** [20 December 2020 23:56 UTC](https://discourse.nodered.org/t/serial-port-rs485-question/37817/2 "2020-12-20T23:56:35Z")

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Hi Becker,

1. Is this the same Raspberry Pi you had working before ?
2. I thought there was an Image from NibePi that pre-installed everything needed.  
Did you start a clean install with a 2nd SD card for testing ?

There not much information on the RS-485 Hat from the link you sent us.  
Its just from an online shop and no useful information regarding installation in the Datasheet on that page.

I have no experience in these Hats since i use a cheap ebay USB to RS485 for my modbus tests.  
but i found an article from a similar RS485 Hat that i hope you may find useful.

```
sudo raspi-config
goto '5 Interfacing Options'
goto 'P6 Serial'
'Would you like a login shell to be accessible over serial?' --> NO
'Would you like the serial port hardware to be enabled?' --> YES
Finish raspi-config
reboot the Raspberry Pi

```

Now you can access the UART via **/dev/serial0**

[LINK TO ARTICLE](https://www.hackster.io/hartmut-wendt/node-red-rs485-raspberry-pi-tutorial-7cde1a)

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