MikroTik RB952Ui-5ac2nD (hAP ac lite)

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Very small, but good router for small environments. Based on cheap MIPSBE technology, the devices delivers good, stable value. Biggest downside are the missing Gigabit Ports, the router works with 100 MBit Ports!!. WLAN working ok, 2 GHZ and 5 GHZ on board.

MikroTik RB952Ui-5ac2nD (hAP ac lite)


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  • base-system should lead the way, do not explain this again
  • DO NOT provide a complete howto here! Instead groom the general documentation.

OpenWrt installation with windows

The installation procedure is described and maintained upstream in Common Procedures for Mikrotik RouterBoard Products.

Especially the described / recommended Tftp Tool Tiny PXE with enabled RFC951 BOOTP feature seems to be superior to the TFTP64 / TFTP32 Software approach (which is explained in detail in the following text):

Boot up the RB952Ui, connect your client to any of the ports 2 to 5 but not the Internet labled port (Port 1).

Open the Browser interface, IP Address The user is admin with no password.

Navigate to WebFig → System → Routerboard → Settings

set boot-device to "try-ethernet-once-then-nand"
set force-backup-booter to "yes"

Apply the configuration.

Start the program tftpd32 and configure the TFTP and DHCP servers as follows:

go to Settings...
   1.GLOBAL: you only has to activate the "DHCP Server" and "TFTP Server". 
   2.TFTP: the Base Directory is the link to the folder, where you have saved the configuration file.
   3.DHCP: (for example)
     -IP pool start address:
     -Size of pool: 25
     -Boot File: The filename of the configuration file in the Base Directory

Save the configuration and restart tftpd32, so the DHCP and TFTP servers starting.

Reboot the router, while rebooting you must connect your client with the DHCP and TFTP Server to the Internet labled port (Port1) on the router.

Now the router boot over network and when the red lamp on port 5 light up, the router install openwrt.

When the router has finished, you can deactivate the DHCP and TFTP servers and connect your client on port 2 to 5. The new IP Address is

Copy the upgrade file with WinSCP to the /tmp folder on the router. Start a SSH session to the router, the username is root. Execute the upgrade file using command “sysupgrade -v -n /tmp/...(filename)”.

FIXME Find out flash layout, then add the flash layout table here (copy, paste, modify the example).

Please check out the article Flash layout. It contains examples and explanations that describe how to document the flash layout.

  • Browse to LuCI Upgrade URL
  • Upload image file for sysupgrade to LuCI
  • Wait for reboot

If you don't have a GUI (LuCI) available, you can alternatively upgrade via the command line. There are two command line methods for upgrading:

  • sysupgrade
  • mtd

Note: It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.


  • Login as root via SSH on, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc


If sysupgrade does not support this router, use mtd.

  • Login as root via SSH on, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot

Mikrotik Devices can be reverted to stock firmeware / be debricked in an easy way. Follow the instructions here: https://wiki.mikrotik.com/wiki/Manual:Reset and here https://wiki.mikrotik.com/wiki/Manual:Netinstall

Reset Button, the Mikrotik Netinstall tool and the right firmware file do the job. As Mikrotik uses different plattforms, be sure to get the right package. The hap ac2 lite is based on Router OS 6, MIPSBE Plattform. If latested release of RouterOS does not work, try an older version. 6.45 is reportet to work as a first debrick, you can upgrade later with the Winbox Software to latest release

Beware: After you flashed the stock firmware, the device has NO configuration. You must connect to the device with the help of Mikrotiks “Winbox” software which uses the MAC Adress (as the device has no IP) . After Connecting, restore the default configuration and reboot. Then you are ready to start all over again

Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

The router can supply PoE out (passthrough) on the eth5 port. This is controlled with GPIO 14.

Note: According to Mikrotik: “the POE on Ether5 outputs approcimately 2V below input voltage and supports up to 0.58A (So provided 24V PSU will provide 22V/0.58A output to the Ether5 PoE port).”

To enable PoE out (passthrough) set the corresponding value variable in /etc/config/system:

config gpio_switch 'poe_passthrough'
        option name 'PoE Passthrough'
        option gpio_pin '14'
        option value '1'

A reboot is require to activate the change.

!!! Update: Snapshots with Kernel 5.4 may use a different GPIO number for PoE passthrough.



gpiochip0: GPIOs 0-31, parent: platform/ath79-gpio, ath79-gpio:
 gpio-4   (                    |rb:green:user       ) out lo
 gpio-11  (                    |spi0.1              ) out hi
 gpio-14  (                    |POE power           ) out lo
 gpio-16  (                    |Reset button        ) in  hi

gpiochip1: GPIOs 40-47, parent: spi/spi0.1, 74x164, can sleep:
 gpio-40  (                    |rb:green:port1      ) out hi
 gpio-41  (                    |rb:green:port2      ) out hi
 gpio-42  (                    |rb:green:port3      ) out hi
 gpio-43  (                    |rb:green:port4      ) out hi
 gpio-44  (                    |rb:green:port5      ) out hi
 gpio-45  (                    |sysfs               ) out hi
 gpio-46  (                    |rb:blue:wlan        ) out lo

gpiochip2: GPIOs 494-511, ath9k-phy1:
 gpio-495 (                    |ath9k-phy1          ) in  lo

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The default network configuration is:

Interface Name Description Default configuration
vlan0 (eth0.0) EXAMPLE LAN ports (1 to 4) EXAMPLE None
vlan1 (eth0.1) EXAMPLE WAN port EXAMPLE DHCP

FIXME Please fill in real values for this device, then remove the EXAMPLEs

Numbers 0-3 are Ports 1-4 as labeled on the unit, number 4 is the Internet (WAN) on the unit, 5 is the internal connection to the router itself. Don't be fooled: Port 1 on the unit is number 3 when configuring VLANs. vlan0 = eth0.0, vlan1 = eth0.1 and so on.

Port Switch port
Internet (WAN) EXAMPLE 4

hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The MikroTik RB952Ui-5ac2nD (hAP ac lite) has the following buttons:

EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -

Insert photo of front of the casing

Insert photo of back of the casing

Backside label:
Insert photo of backside label

Note: This will void your warranty!

FIXME Describe what needs to be done to open the device, e.g. remove rubber feet, adhesive labels, screws, ...

  • To remove the cover and open the device, do a/b/c

Main PCB:
Insert photo of PCB

port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:
Insert photo of PCB with markings for serial port

FIXME Replace EXAMPLE by real values.

Serial connection parameters
for MikroTik RB952Ui-5ac2nD (hAP ac lite) @@Version@@
EXAMPLE 115200, 8N1

port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port

None so far.



Space for additional notes, links to forum threads or other resources.

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  • Last modified: 2024/02/12 11:13
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