Xiaomi MiWiFi 4A (100M)

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multiple revisions of this device, use caution
abgn+ac (AC1200)
wireless router
Xiaomi mi router 4a mir4ac international 100m.jpg
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev Xiaomi MiWiFi 4A (100MbE)
Model Part Number MIR4A
FCC ID 2AFZZR4AC
Type wireless router
CPU1 checkY MediaTek MT7628DAN
CPU1 Type MIPS 24KEc
CPU1 Speed 580 MHz
Flash1 Chip Winbond W25Q128JV
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 64 MiB67,108,864 B <br />524,288 Kib <br />65,536 KiB <br />512 Mib <br />0.0625 GiB <br />
RAM1 Chip Brand? Model?
ETH chip1 MediaTek MT7628DAN
Switch MediaTek MT7628DAN
Ethernet Port Count 1-100MbE-WAN
2-100MbE-LAN
Wired Standard IEEE 802.3i/3u

802dot11 OUI: none specified

Stock bootloader U-Boot 1.1.3
Stock FW OS Linux 3.10.14 OpenWrt
Expansion IF types none specified
Power 12 VDC, 1 A
Connector type barrel
Serial Port (UART) yes, 3.3V TTL, (115200 8N1)
Other
3rd Party Firmware Support OpenWrt • (List | Dev | DLs)
Retail
FCC approval date 29 July 2021
Country of manuf China
Radio 1
Chip1 MediaTek MT7628DAN
Wireless interface OUI none specified
Antenna Connector Type none specified
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 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
 FCC ID
Xiaomi MiWiFi 4AC International (R4AC) 100M2AFZZR4AC
 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
OpenWrt Target: ramips
OpenWrt Subtarget: mt76x8
OpenWrt Package architecture: mipsel_24kc
Support started version: 19.07.0
Current supported version: 24.10.2

Please insert instructions here

See also

List of Xiaomi Devices - Wireless Routers
WLAN: MediaTek MT7628DA (2.4GHz WiSoC)/MT7612EN (2T2R 802.11ac), (M49) • Review
Flash: Winbond W25Q128JVSC (16MB), RAM: 64MB (int. WiSoC); MTO-WRM49-V1.2 • PCB