How to send a string to serial port via /special-login

RouterOS Scripting
1

Hello,
I set up the user account which is bound to serial port by special-login feature. Well, now I can send a string to device connected to this port when I a’m logged in under the respective account. This is good.

I would like to automate this process by some script AND get reply string back. I failed to pass the string to port by the command like this: echo “string” | ssh -l port-user ip.add.re.ss.

Any idea how send a a string in and get reply out via the ssh script?

Thanks
Martin Calko

2

i dont think the ssh shell will allow you to do this easily. How about using netcat and the /port remote-access feature? That lets you communicate directly to a serial port over tcp/ip without logging in. Maybe you can use some firewall filters to secure it.

3

Well, I tested this:
/port remote-access add allowed-addresses=0.0.0.0/0 channel=0 disabled=no log-file=“” port=serial-usb-1 protocol=rfc2217 tcp-port=3333

and then from linux:
> echo “*B$?” | netcat -n -vv 3333
(UNKNOWN) [routerboard-ip] 3333 (?) open
sent 5, rcvd 0

and in logfile on routerboard appears this:
/log pri
14:01:15 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46409
14:01:44 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46410
14:01:49 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46411
14:01:51 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46412
14:02:05 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46413
14:02:07 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46414
14:02:14 sertcp,info connection to serial remote-access 0.0.0.0:3333 from :46415

but device connected to routerboard’s port does nothing. The same command string entered under /sys serial-terminal port=serial-usb-1 seems working correctly.

Any idea what is wrong? Should be connection opened some special way?

4

try setting protocol to raw on the mikrotik? also, maybe enable telnet negotiation on netcat, if you didnt already. Im not in front on a machine to check those parameters.