GRV-CSERI, serial port redirection to TCP

[nick_stephens]

Hi all
Just wondering if its possible to do a redirection of the SRV-CSERI ports to TCP, similar to how the serial modules worked on PAC devices. ie: the serial module on a PAC could be accessed directly from an external program with <pac_ip_address>:. Is it possible to do the same thing with the EPIC modules?

[gerhardK]

It is not possible to use the GRV-CSERI-4 in this way.

[Beno]

@nick_stephens

do a redirection of the SRV-CSERI ports to TCP

Yes. You just need a little Node-RED glue.

Check the bottom of this thread @philip provides an example flow that takes the EPIC Serial module and opens a TCP port (Don’t forget to open the EPIC Firewall on that same port number) to exchange the data back and forth.

Configure Epic Serial Module GRV-CSERI-4

Hi all. I’m trying to use the Modbus Integration library with an Epic controller and GRV-CSERI-4 serial module (in slot 0). I’m having trouble figuring out how to configure the module, specifically setting the baud rate. The device I’m communicating with uses RS485 at 57600 baud. I figure the comm handle is tcp (tcp:127.0.0.1:22500), as with other PAC serial modules and I can set the RS485 mode (4-wire) in groovManage but for the life of me I cannot find how to set the serial comm parameters…

[nick_stephens]

Rite on!! That’s a ripper hack!!
So just to be clear, mapping of the serial ports on the modules are /dev/ttySerModx.y where x is the slot number and y is the channel?
Thanks @philip and @Beno

[reevesjj]

Im not sure if there it is available in the Epics repositories but I have used the linux program ser2net in the past.

[Beno]

Minicom is in the repo and works great on EPIC for local testing.

Using GRV-CSERI ports from a program

I found a few things out and from that have inferred the answer is ‘should be possible’. Here you can see the shell program ‘minicom’ receiving data from a GPS receiver sitting on my desk (it was the only serial device I could quickly put my hands on). [image] You can see I have set the baud rate to 9600, 8 data bits, No parity and 1 stop bit. I did this from within Minicom. Since I can do it there, I am inferring that you should be able to set the comm port parameters from the Linux progr…

For auto diverting, you can try netcat and pipe it to a udp stream, I had mixed success and might revisit it, but Node-RED works so well its hard to find the time on the other.

But to your point… no, ser2net is not in the repo.

[Beno]

@nick_stephens

/dev/ttySerModx.y where x is the slot number and y is the channel?

Nick.
I just tested / confirmed that is correct.
Keep in mind you can only use the serial modules in the first 4 slots, so 0 to 3 only.

[philip]

Another nice feature of using Node-RED for this is the debug nodes. They are very helpful when troubleshooting communication issues to see what is coming and going.