Xiaomi MiWiFi 4A (R4AG)

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multiple revisions of this device, use caution
abgn+ac (AC1200)
High-Speed Dual Band AC1200 Router
Xiaomi MiWiFi 4A.png
Homepage Product page
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev Xiaomi MiWiFi 4 AG
FCC ID 2AFZZR4A
Type wireless router
Series MiWiFi
CPU1 checkY 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 brandRadio1 chip1 brandRadio2 chip1 brand
Xiaomi MiWiFi 4 Pro (R1350)Qualcomm AtherosQualcomm AtherosQualcomm Atheros
Xiaomi MiWiFi 4A (100M)MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4A (R4AG)MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4A v2MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4AC International (R4AC) 100MMediaTekMediaTekMediaTek

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

For a list of all currently documented Xiaomi devices 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: 24.10.2

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