D-Link DIR-853 rev A3

multiple revisions of this device, use caution

abgn+ac (AC1300)
AC1300 MU-MIMO Wi-Fi Router
Homepage	Product page
Wikipedia	D-Link
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	D-Link DIR-853 rev A3
FCC ID	none specified
Type	wireless router
CPU1 Y	MediaTek MT7621DAT
CPU1 Type	MIPS 1004Kc
CPU1 Speed	880 MHz ( 2 cores ) 16-bit
Flash1 Chip	Brand? Model?
Flash1 Size	128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br /> (NAND)
RAM1 Size	256 MiB 268,435,456 B <br />2,097,152 Kib <br />262,144 KiB <br />2,048 Mib <br />0.25 GiB <br />
RAM1 Chip	Brand? Model?
ETH chip1	MediaTek MT7621DAT
Switch	MediaTek MT7621DAT
Ethernet Port Count	1-1GbE-WAN 4-1GbE-LAN
Wired Standard	IEEE 802.3i/3u/3ab
802dot11 OUI: none specified
Stock bootloader	U-Boot
Expansion IF types	USB
USB ports	1
USB Hub Compatible	Untested
Power	12 VDC, 1.5 A
Serial Port (UART)	yes, 3.3V TTL, (57600 8N1)
Other
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Radio 1
Chip1	MediaTek MT7615DN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11b/g/n
n-QAM	up to 400 Mbps
802.11n	up to 300 Mbps
802.11g	up to 54 Mbps
802.11b	up to 11 Mbps
WiFi Operating Frequency	2.4 GHz
Radio 2
Chip1	MediaTek MT7615DN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11a/n/ac
802.11ac	up to 867 Mbps
802.11n	up to 300 Mbps
802.11a	up to 54 Mbps
WiFi Operating Frequency	5 GHz
CPU1 brand Radio1 chip1 brand Radio2 chip1 brand D-Link DIR-853 rev A1 MediaTek MediaTek MediaTek D-Link DIR-853 rev A3 MediaTek MediaTek MediaTek D-Link DIR-853 rev R1 MediaTek MediaTek MediaTek

For a list of all currently documented MediaTek chipsets with specifications, see MediaTek.

For a list of all currently documented D-Link devices with specifications, see D-Link.

• 400 Mbps - 2SS 2.4GHz 802.11n (40MHz chan., 256-QAM),

• 867 Mbps - 2SS 5GHz 802.11ac (80MHz chan.) = AC1300 class

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)

Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 22.03.0
Current supported version: 25.12.4

LAN Hardware: MediaTek MT7621DAT
WLAN Hardware: MediaTek MT7615DN
Installation method(s):
see git-commit

git • >>

ramips: add support for D-Link DIR-853 A3 Specifications: * SoC: MT7621AT * RAM: 256MB * Flash: 128MB NAND flash * WiFi: MT7615DN (2.4GHz+5Ghz) with DBDC * LAN: 5x1000M * Firmware layout is Uboot with extra 96 bytes in header * Base PCB is DIR-1360 REV1.0 * LEDs Power Blue+Orange,Wan Blue+Orange,WPS Blue,"2.4G"Blue, "5G" Blue, USB Blue * Buttons Reset,WPS, Wifi MAC addresses on OEM firmware: lan factory 0xe000 f4:*:*:a8:*:65 (label) wan factory 0xe006 f4:*:*:a8:*:68 2.4 GHz [not on flash] f6:*:*:c8:*:66 5.0 GHz factory 0x4 f4:*:*:a8:*:66 The increment of the 4th byte for the 2.4g address appears to vary. Reported cases: 5g 2.4g increment f4:XX:XX:a8:XX:66 f6:XX:XX:c8:XX:66 +0x20 x0:xx:xx:68:xx:xx x2:xx:xx:48:xx:xx -0x20 x4:xx:xx:6a:xx:xx x6:xx:xx:4a:xx:xx -0x20 Since increment is inconsistent and there is no obvious pattern in swapping bytes, and the 2.4g address has local bit set anyway, it seems safer to use the LAN address with flipped byte here in order to prevent collisions between OpenWrt devices and OEM devices for this interface. This way we at least use an address as base that is definitely owned by the device at hand. Flashing instruction: The Dlink "Emergency Room" cannot be accessed through the reset button on this device. You can either use console or use the encrypted factory image availble in the openwrt forum. Once the encrypted image is flashed throuh the stock Dlink web interface, the sysupgrade images can be used. Header pins needs to be soldered near the WPS and Wifi buttons. The layout for the pins is (VCC,RX,TX,GND). No need to connect the VCC. the settings are: Bps/Par/Bits  : 57600 8N1 Hardware Flow Control : No Software Flow Control : No Connect your client computer to LAN1 of the device Set your client IP address manually to 192.168.0.101 / 255.255.255.0. Call the recovery page or tftp for the device at http://192.168.0.1 Use the provided emergency web GUI to upload and flash a new firmware to the device At the time of adding support the wireless config needs to be set up by editing the wireless config file: * Setting the country code is mandatory, otherwise the router loses connectivity at the next reboot. This is mandatory and can be done from luci. After setting the country code the router boots correctly. A reset with the reset button will fix the issue and the user has to reconfigure. * This is minor since the 5g interface does not come up online although it is not set as disabled. 2 options here: 1- Either run the "wifi" command. Can be added from LUCI in system - startup - local startup and just add wifi above "exit 0". 2- Or add the serialize option in the wireless config file as shown below. This one would work and bring both interfaces automatically at every boot: config wifi-device 'radio0' option serialize '1' config wifi-device 'radio1' option serialize '1'