Xiaomi MiWiFi 4A (R4AG)
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| abgn+ac (AC1200) | |||||||||||||||||||||||||||||||||||||||||
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| High-Speed Dual Band AC1200 Router | |||||||||||||||||||||||||||||||||||||||||
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| 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 | |||||||||||||||||||||||||||||||||||||||||
| Brand • Model • Rev | Xiaomi MiWiFi 4 AG | ||||||||||||||||||||||||||||||||||||||||
| FCC ID (fcc.io) | 2AFZZR4A | ||||||||||||||||||||||||||||||||||||||||
| FCC ID (fcc.report) | 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 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 | ||||||||||||||||||||||||||||||||||||||||
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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) | ||||||||||||||||||||||||||||||||||||||||
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| Other | |||||||||||||||||||||||||||||||||||||||||
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Default SSID: Xiaomi_XXXX (19 addl. 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 | ||||||||||||||||||||||||||||||||||||||||
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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.
Flashing
| NOTE: During configuration or flashing a device, the only things that should be hooked to the device is the computer and power. |
Flashing OpenWrt
Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 21.02.0
Current supported version: 25.12.2
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 21.02.0
Current supported version: 25.12.2
LAN Hardware: MediaTek MT7621AT
WLAN Hardware: MediaTek MT7603E, MediaTek MT7612E
WLAN Comment: 2x2:2 MIMO both channels
Installation method(s):
U-Boot TFTP + serial recovery, see git-commit
Recovery method(s):
U-Boot TFTP + serial recovery
Comment:
Identical hardware as Xiaomi 3G v2
WLAN Hardware: MediaTek MT7603E, MediaTek MT7612E
WLAN Comment: 2x2:2 MIMO both channels
Installation method(s):
U-Boot TFTP + serial recovery, see git-commit
Recovery method(s):
U-Boot TFTP + serial recovery
Comment:
Identical hardware as Xiaomi 3G v2
| git • >> |
|---|
ramips: add Xiaomi Mi Router 4A Gigabit explicitly
This device has previously been supported by the image
for Xiaomi Mi Router 3G v2. Since this is not obvious, the
4A is marketed as a new major revision and it also seems to
have a different bootloader, this will be both more tidy and
more helpful for the users.
Apart from that, note that there also is a 100M version of
the device that uses mt7628 platform, so a specifically named
image will also prevent confusion in this area.
Specifications:
- SoC: MediaTek MT7621
- Flash: 16 MiB NOR SPI
- RAM: 128 MiB DDR3
- Ethernet: 3x 10/100/1000 Mbps (switched, 2xLAN + WAN)
- WIFI0: MT7603E 2.4GHz 802.11b/g/n
- WIFI1: MT7612E 5GHz 802.11ac
- Antennas: 4x external (2 per radio), non-detachable
- LEDs: Programmable "power" LED (two-coloured, yellow/blue)
Non-programmable "internet" LED (shows WAN activity)
- Buttons: Reset
Installation:
Bootloader won't accept any serial input unless "boot_wait" u-boot
environment variable is changed to "on".
Vendor firmware won't accept any serial input until "uart_en" is
set to "1".
Using the https://github.com/acecilia/OpenWRTInvasion exploit you
can gain access to shell to enable these options:
To enable uart keyboard actions - 'nvram set uart_en=1'
To make uboot delay boot work - 'nvram set boot_wait=on'
Set boot delay to 5 - 'nvram set bootdelay=5'
Then run 'nvram commit' to make the changes permanent.
Once in the shell (following the OpenWRTInvasion instructions) you
can then run the following to flash OpenWrt and then reboot:
'cd /tmp; curl https://downloads.openwrt.org/...-sysupgrade.bin
--output firmware.bin; mtd -e OS1 -r write firmware.bin OS1'
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Pictures
See also
- Xiaomi Mi Router AC1200 (RB02) • MediaTek MT7621DAT @880MHz
- 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
- Xiaomi MiWiFi 4 (R4) • Xiaomi MiWiFi 4 (M41) • 2021
- MediaTek MT7621A @880MHz, 128MB/128MB, GbE, AC1200
- Xiaomi MiWiFi 4A Gigabit (R4A) • Xiaomi MiWiFi 4A (GbE) • 2021
- 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
- Xiaomi MiWiFi 4C (R4CM) • Xiaomi MiWiFi 4C (R4CM) • 2021
- MediaTek MT7628N @580MHz, 16MB/64MB, 100M, N300 (2.4GHz)
- FCC ID: 2AFZZR4CM (2021-04-12) • Mi Router 4C (R4CM) (DVB4231GL)
- Xiaomi MiWiFi 4Q (R4C) • Xiaomi MiWiFi 4Q (R4C) • 2021
- Qualcomm Atheros QCA9561 @775MHz, 16MB/64MB, 100M, N450
- Xiaomi MiWiFi 4 Pro (R1350) • Mi Router 4 Pro (R1350) • 2020
- Qualcomm Atheros QCA9563/QCA9886 (AC1350), 16MB/128MB, 1G
Categories:
- Xiaomi
- Embedded system/wireless router
- Embedded System MediaTek
- Embedded System MT7621AT
- MediaTek
- Embedded System MIPS 1004Kc
- Embedded System
- Manuf Xiaomi
- OpenWrt Supported
- Embedded System MT7603EN
- Has Mimo Status
- Embedded System IEEE 802.11b/g/n
- Embedded System MT7612EN
- Embedded System IEEE 802.11a/n/ac
- Dual-Radio Wireless Embedded System
- Wireless Embedded System
- Dual-Band
- English Documentation