Xiaomi Mi Router AC2100 (R2100)

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abgn+ac (AC2100)
AC2100 Wireless Router
Homepage Product page
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev Xiaomi Mi Router AC2100 (R2100)
FCC ID (fcc.io) none specified
FCC ID (fcc.report) none specified
Type wireless router
CPU1 checkY MediaTek MT7621A
CPU1 Type MIPS 1004Kc
CPU1 Speed 880 MHz ( 2 cores ) 16-bit
Flash1 Chip ESMT Model?
Flash1 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 /> (NAND)
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 /> (DDR3)
RAM1 Chip Brand? Model?
ETH chip1 MediaTek MT7621A
Switch MediaTek MT7621A
Ethernet Port Count 1-1GbE-WAN
3-1GbE-LAN
Wired Standard IEEE 802.3i/3u/3ab

802dot11 OUI: none specified

Stock bootloader U-Boot
Expansion IF types none specified
Power ? VDC, ? A
Connector type barrel
Serial Port (UART) yes, 3.3V TTL, (115200 8N1)
Other
3rd Party Firmware Support OpenWrt • (List | Dev | DLs)
Radio 1
Chip1 MediaTek MT7603E
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 MT7615N
Wireless interface OUI none specified
Antenna Connector Type none specified
MIMO status 4x4:4
Wireless Standard IEEE 802.11a/n/ac
802.11ac up to 1733 Mbps
802.11n up to 600 Mbps
802.11a up to 54 Mbps
WiFi Operating Frequency 5 GHz
 CPU1 brandRadio1 chip1 brandRadio2 chip1 brand
Xiaomi Mi Router AC1200 (RB02)MediaTekMediaTekMediaTek
Xiaomi Mi Router AC2100 (R2100)MediaTekMediaTekMediaTek
Xiaomi Mi Router AIoT AC2350 (R2350)Qualcomm AtherosQualcomm AtherosQualcomm Atheros
Xiaomi Mi Router AIoT AX6000QualcommQualcommQualcomm

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.

1733 Mbps - 4SS 5GHz 802.11ac (80MHz chan.),
300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = AC2100 class

Overview

Links of Interest

On the OpenWrt Wiki

Flashing

Flashing OpenWrt

Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Support started version: 21.02.0
Current supported version: 25.12.2
LAN Hardware: MediaTek MT7621A
WLAN Hardware: MediaTek MT7603, MediaTek MT7615
Installation method(s):
see git-commit
Comment:
Black cylindrical case. Not to be mixed up with Redmi AC2100!
git • >>
ramips: Add support for Xiaomi Mi Router(Black,R2100)
The Xiaomi Mi Router AC2100 is a *black* cylindrical router that shares many
characteristics (apart from its looks and the GPIO ports) with the 6-antenna
*white* "Xiaomi Redmi Router AC2100"

See the visual comparison of the two routers here:
https://github.com/emirefek/openwrt-R2100/raw/imgcdn/rm2100-r2100.jpg

Specification of R2100:
- CPU: MediaTek MT7621A
- RAM: 128 MB DDR3
- FLASH: 128 MB ESMT NAND
- WIFI: 2x2 802.11bgn (MT7603)
- WIFI: 4x4 802.11ac (MT7615)
- ETH: 3xLAN+1xWAN 1000base-T
- LED: Power, WAN in Yellow and Blue
- UART: On board (Don't know where is should be confirmed by anybody else)
- Modified u-boot

Hacking of official firmware process is same at both RM2100 and R2100.
Thanks to @namidairo

Here is the detailed guide Hack: https://github.com/impulse/ac2100-openwrt-guide
Guide is written for MacOS but it will work at linux.
needed packages: python3(with scapy), netcat, http server, telnet client

1. Run PPPoE&exploit to get nc and wget busybox, get telnet and wget firmware
2. mtd write openwrt-ramips-mt7621-xiaomi_mi-router-ac2100-kernel1.bin kernel1
3. nvram set uart_en=1
4. nvram set bootdelay=5
5. nvram set flag_try_sys1_failed=1
6. nvram commit
7. mtd -r write openwrt-ramips-mt7621-xiaomi_mi-router-ac2100-rootfs0.bin rootfs0

other than these I specified in here. Everything is same with:
https://github.com/openwrt/openwrt/commit/f3792690c4f0567a8965d82898295b9d50c3bb7e
Thanks for all community and especially for this device:
@Ilyas @scp07 @namidairo @Percy @thorsten97 @impulse (names@forum.openwrt.com)

MAC Locations:
WAN *:b5 = factory 0xe006
LAN *:b6 = factory 0xe000
WIFI 5ghz *:b8 = factory 0x8004
WIFI 2.4ghz *:b7 = factory 0x0004