# How To: Using PFC200 Onboard Serial Port with Node-RED

**URL:** <https://www.wago.community/t/how-to-using-pfc200-onboard-serial-port-with-node-red/68>\
**Category:** Node-RED\
**Tags:** pfc200, serial\
**Created:** [May 26, 2022, 10:09pm UTC](https://www.wago.community/t/how-to-using-pfc200-onboard-serial-port-with-node-red/68 "2022-05-26T22:09:05Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![WagoKurt](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagokurt/32/11_2.png) [@WagoKurt](https://www.wago.community/u/WagoKurt)\
**Post date:** [July 29, 2022, 2:39pm UTC](https://www.wago.community/t/how-to-using-pfc200-onboard-serial-port-with-node-red/68/2 "2022-07-29T14:39:07Z")

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To change the serial port mode you can use the command line tool found in /etc/config-tools directory called set\_serial\_mode.  
`cd /etc/config-tools/`  
To use RS485 (default):  
`./set_serial_mode rs485`  
To use RS232:  
`./set_serial_mode rs232`

![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/c0df9595b3dda56f73ce9ed33256b31f03565379.png)

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