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I would like to say in advance that this is one of my first times working with the modbus protocol and, mostly, with Rust.
Recently I've been working with a PLC (Xenje XC3-24RT-E) and wanted to build a small interface for it. I managed to make it work almost on the first attempt using the first Node.js module I could find, but since I wanted to experiment with Tauri I thought I might as well try to do the backend Rust.
So, I cloned the repo and ran the rtu-server example, but after building it gave me the following error:
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { kind: Unknown, description: "Device or resource busy" }', examples/rtu-server.rs:53:68
I then tried to check if the port was being used somewhere else, and I confirmed it wasn't by running the command lsof /dev/ttyUSB0 (lsof).
I would also like to note that in my Node.js code I'm using the following port settings, so maybe I'm doing something wrong by not changing the default example.
and run socat -d -d pty,raw,echo=0 pty,raw,echo=0
You will get two virtual serial ports for unix. (development purpose)
`
2023/11/28 15:10:19 socat[66531] N PTY is /dev/ttys031
2023/11/28 15:10:19 socat[66531] N PTY is /dev/ttys033
2023/11/28 15:10:19 socat[66531] N starting data transfer loop with FDs [5,5] and [7,7]
`
Use one for the server and another for the client
`
let server_builder = tokio_serial::new("/dev/ttys031", 19200);
let client_builder = tokio_serial::new("/dev/ttys033", 19200);
`
Use these builder for server and client. It will work.
Hello!
I would like to say in advance that this is one of my first times working with the modbus protocol and, mostly, with Rust.
Recently I've been working with a PLC (Xenje XC3-24RT-E) and wanted to build a small interface for it. I managed to make it work almost on the first attempt using the first Node.js module I could find, but since I wanted to experiment with Tauri I thought I might as well try to do the backend Rust.
So, I cloned the repo and ran the rtu-server example, but after building it gave me the following error:
I then tried to check if the port was being used somewhere else, and I confirmed it wasn't by running the command
lsof /dev/ttyUSB0
(lsof).I would also like to note that in my Node.js code I'm using the following port settings, so maybe I'm doing something wrong by not changing the default example.
Thank you to anyone who's willing to help.
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