# Communicate Node-RED with rs485

**URL:** https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434
**Category:** General
**Created:** [21 July 2022 16:30 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434 "2022-07-21T16:30:29Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![vidal\_jr](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/vidal_jr/32/65020_2.png) [@vidal\_jr](https://discourse.nodered.org/u/vidal_jr)
#### Post date: [21 July 2022 16:30 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434/1 "2022-07-21T16:30:29Z")

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Hi everyone, I’m trying to communicate with red node to a ballast via an RS485 to USB converter. This ballast is used to light some lamps.

I have the ballast configured for communication via RS485, connected to the RS485 to USB converter, and the Node-RED IN serial is configured on the correct port and baud.

I did this basic serial communication test, but I don’t get any debugs:

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/c/f/cf4942e15212018c91aabb128487a73649ed5971.png)

I enclose the ballast manual:

 ![RS485-Haisen-RJ45- 2022_pages-to-jpg-0005](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/a/6a506229799e954a16d6a74b921bd686674c78e2.jpeg)

I hope you can help me send hexadecimal commands that are detailed in the manual as I do not handle this part very well. I’ve worked with Modbus, but not with pure rs485.

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### Author: ![vidal\_jr](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/vidal_jr/32/65020_2.png) [@vidal\_jr](https://discourse.nodered.org/u/vidal_jr)
#### Post date: [21 July 2022 16:31 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434/2 "2022-07-21T16:31:07Z")

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![RS485-Haisen-RJ45- 2022_pages-to-jpg-0006](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/b/7/b71fd6d5501832660991932b3688284463d1ae51.jpeg)  
 ![RS485-Haisen-RJ45- 2022_pages-to-jpg-0007](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/d/3d5257329edadf9948410bedb6291faa47ef892b.jpeg)

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### Author: ![grant1](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/grant1/32/49890_2.png) [@grant1](https://discourse.nodered.org/u/grant1)
#### Post date: [25 July 2022 09:34 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434/3 "2022-07-25T09:34:40Z")

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Welcome @vidal_jr

To help you sort through the output that may be coming across your USB adapter, install a Modbus scanner and see what comes through. Compare that info with your tables from the manual. There are many Modbus scanners, but I have had good success with [this one](https://store.chipkin.com/products/tools/cas-modbus-scanner).

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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: [23 September 2022 09:35 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434/4 "2022-09-23T09:35:26Z")

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