Serial console issues with CCR1036-8G-2S+

Hello,

I can connect to the cloud router via webfig fine, but after a handful of lockouts, I figured to use the serial connection so as to avoid having to do resets to get back in.

Problem is, I can’t get a connection.

I’m using a USB to serial connection with a female to female serial cable connected to the console port.

I’m using Putty (with the correct COM port) and tried several different baud rates with data bits 8, parity none, flow control none and stop bits 1. Putty connects to the COM port, but nothing displays when typing on the keyboard.

Current firmware is 3.27

[admin@MikroTik] > port print detail
Flags: I - inactive
0 name=“serial0” used-by=“Serial Console” device=“”
channels=1 baud-rate=auto data-bits=8 parity=none
stop-bits=1 flow-control=none


1 name=“serial1” used-by=“” device=“” channels=1
baud-rate=auto data-bits=8 parity=none stop-bits=1
flow-control=none

Any ideas on what I am doing wrong or what else to trouble shoot?

When you need to change the gender of a serial cable to make it connect, there is always the uncertainty
if you also need to cross the transmit/receive lines. (straight vs “null modem” cable)

As the device has a male connector, when it is correctly wired according to standards, and you want to connect
an external device which also has a male connector, you need to put a “null modem” inbetween.
I.e. the pins should be wired like this:

2 — 3
3 — 2
5 — 5

This is for the minimal tx-rx-only cable, in addition it could be prudent to do:

7 — 8
8 — 7
4 — 1+6
1+6 — 4

Note I have no experience with this particular device, on my router the RS232 is an RJ45 and it works with
a standard “cisco blue cable”. It would have been better when all routers had this connector, but in the case
of the CCR it is a 9-pin D connector.