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Mikrotik RS485 support?

Sat May 28, 2016 3:39 am

680MHz CPU, 64MB RAM, 1xEthernet, miniPCI, RouterOS L4

680MHz CPU, 256MB RAM, 5xGigabit Ethernet RouterOS L5


RS232 ↔ RS485 converter
link length RS-485 interface = 1000m


Mikrotik WAN port - internet provider (PPPoE, L2TP, PPTP, IPoE) +++ RS232 >>> RS232 ↔ RS485 converter >>> out
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Re: Mikrotik RS485 support?

Wed Jun 01, 2016 1:44 pm

Can you first post why you need this?
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Re: Mikrotik RS485 support?

Fri Oct 21, 2016 4:18 pm

Yes it can. i think ?

i would like to do it too.

What is possible , i have tried :

Connect a RB433 serial rs232 --- rs232toUSB----USB rb951UI Ethernet(

on rb951ui :

/port remote-access
add port=usb2 tcp-port=9999

now i can Telnet from my PC : telnet 9999 , which will log me in to the RB433

So i know how this works, to test further i have to wait for my usb-rs485 converter to send/read a rs485 device.
Dont know what your goal is. i would like to request data from rs485 devices behind the mikrotik and send it as snmp/trap if possible.

maybe someone can assist further in this ?
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Re: Mikrotik RS485 support?

Wed Aug 22, 2018 5:39 pm

Anyone else have any success with RS-232 --> RS-485 or even better, a USB to RS-485 converter? I have two applications for this:

1) We have some solar powered repeaters, and the charge controllers only talk rs485.

2) We have some installations where we use Mikrotik for connectivity and industrial controllers for remote control and logic. They only talk RS-485.

It would really help if we could communicate directly from a Mikrotik device with USB directly to the 485 device.


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Re: Mikrotik RS485 support?

Thu Aug 23, 2018 12:59 am

you can use these:

it uses prolific PL2303 usb to serial chip, which is supported by RouterOS. then you just use routeros' built in rfc2217 serial over tcp feature described here: ... 7_COM_port

you can even use an usb hub to connect more independent rs485 networks. keep in mind that this only supports async serial.
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Re: Mikrotik RS485 support?

Thu Jan 24, 2019 9:03 am

I am trying to get that working right now and I would appreciate some help.
I have hAP AC and epsolar mppt charge controller with its originnal cable ... html?cur=2

and I am unable to get that work. When I connect that cable I can see in system / resources / usb new device (XR21B1411) and when I go to system / ports there is a new port called usb2 (not serial).

Is this normal behavior? I cant get anything from terminal (and I tried to set up speed and parity in that USB2 port settings) and not sure if there is problem somewhere else or if the ROS cannot work with this cable. I already ordered one from ebay but thats for month...


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