Xiaomi MiWiFi 4A (R4AG)

multiple revisions of this device, use caution

abgn+ac (AC1200)
High-Speed Dual Band AC1200 Router
Homepage	Product page
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	Xiaomi MiWiFi 4 AG
FCC ID	2AFZZR4A
Type	wireless router
Series	MiWiFi
CPU1	MediaTek MT7621AT
CPU1 Type	MIPS 1004Kc
CPU1 Speed	880 MHz ( 2 cores ) 16-bit
Flash1 Chip	GigaDevice GD25Q127CSIG
Flash1 Size	16 MiB16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
RAM1 Size	128 MiB134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br />
RAM1 Chip	ESMT M15T1G1664A-AZC1
ETH chip1	MediaTek MT7621AT
Switch	MediaTek MT7621AT
Ethernet Port Count	1-1GbE-WAN 2-1GbE-LAN
Wired Standard	IEEE 802.3i/3u/3ab
802dot11 OUI: none specified
Stock bootloader	U-Boot
Stock FW OS	Linux 3.10.14
Expansion IF types	none specified
Power	12 VDC, 1 A
Connector type	barrel
Serial Port (UART)	yes, 4-pad header, J4
Other
Default SSID: Xiaomi_XXXX (19 addl. devices) , Xiaomi_XXXX_5G (16 addl. devices) Default IP address: 192.168.31.1 the IP 192.168.31.1 is used by 20 additional devices of which 19 are Xiaomi devices
Manuf/OEM/ODM	Xiaomi
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Retail
FCC approval date	14 April 2021
(Est.) release date	May 2018
Country of manuf	China
Radio 1
Chip1	MediaTek MT7603EN
Wireless interface OUI	none specified
Antenna Connector Type	soldered
MIMO status	2x2:2
Wireless Standard	IEEE 802.11b/g/n
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 MT7612EN
Wireless interface OUI	none specified
Antenna Connector Type	soldered
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 Xiaomi MiWiFi 4 Pro (R1350) Qualcomm Atheros Qualcomm Atheros Qualcomm Atheros Xiaomi MiWiFi 4A (100M) MediaTek MediaTek MediaTek Xiaomi MiWiFi 4A (R4AG) MediaTek MediaTek MediaTek Xiaomi MiWiFi 4A v2 MediaTek MediaTek MediaTek Xiaomi MiWiFi 4AC International (R4AC) 100M MediaTek MediaTek MediaTek

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

For a list of all currently documented Xiaomi device with specifications, see Xiaomi.

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

• 300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = AC1200 class

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)
On the OpenWrt Wiki
On the OpenWrt Forum
OpenWrt Target: ramips
OpenWrt Subtarget: mt7621
OpenWrt Package architecture: mipsel_24kc
Support started version: 21.02.0
Current supported version: 23.05.5

Please insert instructions here

Pictures

User Images

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  Front

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  Bottom and screws location

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  PCB without heatspreaders

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  EU power supply