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+--- Thread: Modbus RTU over TCP (/showthread.php?tid=1677)
Modbus RTU over TCP - lpala - 25.10.2018
Hi All,
is there any way to get luamodbus working with device using RTU over TCP?
Thanks
Luca
RE: Modubus RTU over TCP - admin - 26.10.2018
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.
RE: Modubus RTU over TCP - lpala - 26.10.2018
(26.10.2018, 07:29)admin Wrote: 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
RE: Modbus RTU over TCP - admin - 29.10.2018
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')