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
WikiDevi.wi-cat.ru Xiaomi MiWiFi 4A Gigabit (R4A)
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev Xiaomi MiWiFi 4 AG
FCC ID (fcc.io) 2AFZZR4A
FCC ID (fcc.report) 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 MiB 16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
RAM1 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 />
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, 3.3V TTL, (115200 8N1)
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 (R4)MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4 Pro (R1350)Qualcomm AtherosQualcomm AtherosQualcomm Atheros
Xiaomi MiWiFi 4A (R4AC)MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4A (R4AG)MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4A v2MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4AC International (R4AC) 100MMediaTekMediaTekMediaTek
Xiaomi MiWiFi 4AC International (R4AC) 100M v2MediaTekMediaTekMediaTek
Xiaomi MiWiFi 4C (R4CM)MediaTekMediaTek
Xiaomi MiWiFi 4Q (R4C)Qualcomm AtherosQualcomm Atheros

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

OpenWrt Target: ramips
OpenWrt Subtarget: mt7621
OpenWrt Package architecture: mipsel_24kc
Support started version: 21.02.0
Current supported version: 24.10.5
LAN Hardware: MediaTek MT7621AT
WLAN Hardware: MediaTek MT7603E, MediaTek MT7612E
WLAN Comment: 2x2:2 MIMO both channels
Comment:
Identical hardware as Xiaomi 3G v2

Please insert instructions here

Pictures

User Images

See also

MediaTek MT7621DAT/MT7603EN/MT7613BEN, 3x GbE, AC1200
FCC ID: 2AFZZRB02 (10/18/2021) • Xiaomi Router AC1200 (RB02)
2AFZZRA75 (2021-08-02) • Mi WiFi Range Extender AC1200 (RA75)
2AFZZRC04 (2024-07-03) • Xiaomi WiFi Range Extender AC1200 (RC04)
 FCC ID
2AFZZRC04 (2024-07-03) • Xiaomi WiFi Range Extender AC1200 (RC04)
2AFZZRB02 (2021-10-18) • Xiaomi Router AC1200 (RB02)
2AFZZRA75 (2021-08-02) • Mi WiFi Range Extender AC1200 (RA75)

2AFZZR4AC (2021-07-29) • Mi Router 4A (R4AC)
2AFZZR4A (2021-04-14)  • Mi Router 4A Gigabit Edition (R4A)
2AFZZR4CM (2021-04-12)	• Mi Router 4C (R4CM)

Mi Router 4 Pro			R1350	🟢🟢🟢25 • DVB4245CN
Mi Router 4C			R4CM	2021	2AFZZR4CM 🔴 DVB4231GL
Mi Router 4Q			R4C	🟢🟢🟢15
Mi Router 4A			R4AC	2021	2AFZZR4AC 🔴 🟢🟢🟢19
Mi Router 4A Gigabit		R4A	2021	2AFZZR4A  🔴 DVB4224GL
Mi Router 4A Gigabit V2		R4AV2	🟢🟢🟢42 ^ (CN)
Mi Router 4			R4	🟢🟢🟢14

Models

XiaomiList of Xiaomi Wireless Devices
MediaTek MT7621A @880MHz, 128MB/128MB, GbE, AC1200
MediaTek MT7621A @880MHz, 16MB/128MB, 1G, AC1200 (DVB4224GL)
FCC ID: 2AFZZR4A (2021-04-14) • Mi Router 4A Gigabit Edition (R4A)
MediaTek MT7628DAN @580MHz, 16MB/64MB, 100M, AC1200
FCC ID: 2AFZZR4AC (2021-07-29) • Mi Router 4A (R4AC) • 100M
MediaTek MT7628N @580MHz, 16MB/64MB, 100M, N300 (2.4GHz)
FCC ID: 2AFZZR4CM (2021-04-12) • Mi Router 4C (R4CM) (DVB4231GL)
Qualcomm Atheros QCA9561 @775MHz, 16MB/64MB, 100M, N450
Qualcomm Atheros QCA9563/QCA9886 (AC1350), 16MB/128MB, 1G