# how can i use serial port in rs232, 422,485 with a digi trasport wr31? and how i would make the conexion?

**URL:** <https://forums.digi.com/t/how-can-i-use-serial-port-in-rs232-422-485-with-a-digi-trasport-wr31-and-how-i-would-make-the-conexion/20521>\
**Category:** Digi One IA/IAP\
**Tags:** serial, rs485, port, wr31, digi\
**Created:** [May 24, 2019, 1:56pm UTC](https://forums.digi.com/t/how-can-i-use-serial-port-in-rs232-422-485-with-a-digi-trasport-wr31-and-how-i-would-make-the-conexion/20521 "2019-05-24T13:56:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Anna](https://avatars.discourse-cdn.com/v4/letter/a/779978/32.png) [@Anna](https://forums.digi.com/u/Anna)\
**Post date:** [May 24, 2019, 1:56pm UTC](https://forums.digi.com/t/how-can-i-use-serial-port-in-rs232-422-485-with-a-digi-trasport-wr31-and-how-i-would-make-the-conexion/20521/1 "2019-05-24T13:56:36Z")

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I need to communicate for sending and receiving data with a Modbus RTU device via RS485 protocol with a DIGI Transport WR31. Regards

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**Author:** ![shatman](https://avatars.discourse-cdn.com/v4/letter/s/46a35a/32.png) [@shatman](https://forums.digi.com/u/shatman)\
**Post date:** [April 1, 2020, 1:50pm UTC](https://forums.digi.com/t/how-can-i-use-serial-port-in-rs232-422-485-with-a-digi-trasport-wr31-and-how-i-would-make-the-conexion/20521/2 "2020-04-01T13:50:18Z")

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Hello, and welcome to Digi Forum  
There are number of ways you can configure Digi Transport and your serial device.  
Please post details of your application so we can make suggestions

Thank you,

Mike

Digi Tech Support Engineer