Modbus RTU over TCP

[lpala]

Hi All,
is there any way to get luamodbus working with device using RTU over TCP?

Thanks
Luca

[admin]

Which LM version are you using? This has not been tested but it's possible to install and run socat which can create a virtual serial port and proxy data to/from TCP.

[lpala]

Which LM version are you using? This has not been tested but it's possible to install and run socat which can create a virtual serial port and proxy data to/from TCP.

Hi Edgars, i'm using LM 2 reactor with latest stable fw. I've thought to socat too .
How can i install and launch it?

Thanks
Luca

[admin]

Here's socat package for older LMs: https://dl.openrb.com/pkg/socat_1.7.3.2-1_mxs.ipk

Create a resident script with sleep time of at least 1 second, change TCP settings (192.168.1.100:502) as needed. Then use /dev/ttyVIRT0 as ModBus serial port. Resident script is needed to restart socat in case connection is dropped.

Code:

os.execute('socat pty,link=/dev/ttyVIRT0,raw tcp:192.168.1.100:502')