# Work with rs485

**URL:** <https://discourse.nodered.org/t/work-with-rs485/50132>\
**Category:** General\
**Created:** [24 August 2021 20:10 UTC](https://discourse.nodered.org/t/work-with-rs485/50132 "2021-08-24T20:10:31Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![lexeyfan](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/lexeyfan/32/16187_2.png) [@lexeyfan](https://discourse.nodered.org/u/lexeyfan)\
**Post date:** [24 August 2021 20:10 UTC](https://discourse.nodered.org/t/work-with-rs485/50132/1 "2021-08-24T20:10:31Z")

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friends tell me please, I work with rs485 via usb adapter ch340. node-red use serial in and serial out on dev / ttyUsb0 port. but when I send a request I don't get a response, not in win environment not in linux. the protocol is not modbus. through the provided commands are sent and received, from node-red not. Can you tell me if there is a tool for working with 483?

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**Author:** ![Gunner](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/gunner/32/43582_2.png) [@Gunner](https://discourse.nodered.org/u/Gunner)\
**Post date:** [24 August 2021 20:56 UTC](https://discourse.nodered.org/t/work-with-rs485/50132/2 "2021-08-24T20:56:38Z")

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You might want to correct your title and last comment... rs48 **3** is not a communications protocol and confuses the search 😛

On that note, have you searched this forum and the palette for rs485?

This is old, but might work?

> **[node-red-contrib-serialport-rs485](https://flows.nodered.org/node/node-red-contrib-serialport-rs485)**
>
> Node-RED nodes to talk to serial ports with RS485/Autoswitch RTS

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**Author:** ![lexeyfan](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/lexeyfan/32/16187_2.png) [@lexeyfan](https://discourse.nodered.org/u/lexeyfan)\
**Post date:** [25 August 2021 06:24 UTC](https://discourse.nodered.org/t/work-with-rs485/50132/3 "2021-08-25T06:24:57Z")

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I watched this package, alas, it is not installed  
log in attachProcessing: 2021-08-25T06\_15\_42\_080Z-debug.log...  
[2021-08-25T06\_15\_42\_080Z-debug.txt](https://discourse.nodered.org/uploads/short-url/9Oc9INj5zK6Geg0EnuU47sppeQU.txt) (252.1 KB)

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**Author:** ![RaptorUK](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/raptoruk/32/46988_2.png) [@RaptorUK](https://discourse.nodered.org/u/RaptorUK)\
**Post date:** [25 August 2021 08:00 UTC](https://discourse.nodered.org/t/work-with-rs485/50132/4 "2021-08-25T08:00:27Z")

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> [@lexeyfan](#):
>
> friends tell me please, I work with rs485 via usb adapter ch340.

Have you tried sending your commands in Windows via a terminal tool such as Realterm ? you need to confirm that you have the correct drivers for your adapter and that your adapter is working, then try sending commands from a terminal app to check you have the correct command syntax . . . . before you start blaming Node Red.

I'm 90% way through a medium sized project which relies heavily on RS485 comms in Node Red using the standard TX and RX comms nodes.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [24 October 2021 08:00 UTC](https://discourse.nodered.org/t/work-with-rs485/50132/5 "2021-10-24T08:00:31Z")

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