Xiaomi MiWiFi 4A (100M)

multiple revisions of this device, use caution

abgn+ac (AC1200)
wireless router
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	Xiaomi MiWiFi 4A (100MbE)
Model Part Number	MIR4A
FCC ID	2AFZZR4AC
Type	wireless router
CPU1	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, 3.3, (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) 100M 2AFZZR4AC
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
OpenWrt Target: ramips
OpenWrt Subtarget: mt76x8
OpenWrt Package architecture: mipsel_24kc
Support started version: 19.07.0
Current supported version: 23.05.5

Please insert instructions here

See also

List of Xiaomi Devices - Wireless Routers

• Xiaomi MiWiFi 4 (M41) - MediaTek MT7621A @880MHz, 128MB/128MB, GbE, AC1200
• Xiaomi MiWiFi 4A (GbE) - MediaTek MT7621A @880MHz, 16MB/128MB, GbE, AC1200
• Xiaomi MiWiFi 4A (100M) - MediaTek MT7628DAN @580MHz, 16MB/64MB, 100M, AC1200

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

• Xiaomi MiWiFi 4C - MediaTek MT7628N @580MHz, 16MB/64MB, 100M, N300 (2.4GHz)
• Xiaomi MiWiFi 4Q - Qualcomm Atheros QCA9561 @775MHz, 16MB/64MB, 100M, N450