# Communication Node Red rs485 without Modbus?
**URL:** https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345
**Category:** General
**Created:** [4 January 2025 08:31 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345 "2025-01-04T08:31:09Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@firstfacility](https://discourse.nodered.org/u/firstfacility)
#### Post date: [4 January 2025 08:31 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/1 "2025-01-04T08:31:09Z")
Hi everyone, I`m trying to read the Values from a Greisinger Gia1002 ns with a rs485 device.
I try it with Node Red Modbus Reader but in the Debug ther is ony an Timeout. I think my device don´t support Modbus.
Can i use the Basic Serial Communication ?
I hope you can help me send hexadecimal commands to my device.
I enclose the ballast manual:[Gir 1002 ns](https://www.greisinger.de/files/upload/en/produkte/bda/GIR1002NS_e.pdf)
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [4 January 2025 11:52 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/2 "2025-01-04T11:52:49Z")
> [@firstfacility](#):
>
> Can i use the Basic Serial Communication
Yes, you should be able to do that, using the serial-request node from [node-red-node-serialport (node) - Node-RED](https://flows.nodered.org/node/node-red-node-serialport).
I had a quick look at the manual and it says that the requests are all ascii strings so you may be able just to send it the strings.
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### Author:  [@firstfacility](https://discourse.nodered.org/u/firstfacility)
#### Post date: [4 January 2025 12:49 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/3 "2025-01-04T12:49:23Z")
i try:
```auto
msg.payload = Buffer.from("\21H\30H\30H\30H\30H\2FH");
return msg;
```
but no answer from Device. What´s wrong ?
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### Author:  [@edje11](https://discourse.nodered.org/u/edje11)
#### Post date: [4 January 2025 12:52 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/4 "2025-01-04T12:52:55Z")
Did you set the TX pin of your RS485 driver before sending? Or is that not necessary with the convertor you have?
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### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [4 January 2025 13:46 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/5 "2025-01-04T13:46:33Z")
What should the command termination character be ?
It is unusual for it to be 2f (hex) = /
I would expect something like 0A hex or 0D hex as they are usually used for Enter when you type in a command.
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### Author:  [@firstfacility](https://discourse.nodered.org/u/firstfacility)
#### Post date: [4 January 2025 14:57 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/6 "2025-01-04T14:57:34Z")
in the Greisinger Dokomentation i can read:
\
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [4 January 2025 15:27 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/7 "2025-01-04T15:27:51Z")
You should not need to use a buffer, you should just be able to send the ascii string direct, I think.
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### Author:  [@firstfacility](https://discourse.nodered.org/u/firstfacility)
#### Post date: [4 January 2025 16:25 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/8 "2025-01-04T16:25:58Z")
Have you got an example, please
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [4 April 2025 16:26 UTC](https://discourse.nodered.org/t/communication-node-red-rs485-without-modbus/94345/9 "2025-04-04T16:26:45Z")
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