Edimax Gemini RG21S

abgn+ac (AC2600)
AC2600 MU-MIMO Home Wi-Fi Roaming Router
Homepage	Product page
WikiDevi.wi-cat.ru	Edimax Gemini RG21S
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Supported
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	Edimax Gemini RG21S 1.0 A
FCC ID	NDD9568771606
Board ID	1244-01001054-50Z
Type	wireless router
CPU1 Y	MediaTek MT7621AT
CPU1 Type	MIPS 1004Kc
CPU1 Speed	880 MHz ( 2 cores ) 16-bit
Flash1 Chip	Brand? Model?
Flash1 Size	16 MiB 16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
Flash2 Size	2 MiB 2,097,152 B <br />16,384 Kib <br />2,048 KiB <br />16 Mib <br />0.00195 GiB <br /> (NOR)
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	Nanya NT5CC64M16GP-DI
ETH chip1	MediaTek MT7621AT
Ethernet Port Count	1-WAN 4-1GbE-LAN
Wired Standard	IEEE 802.3i/3u/3ab
802dot11 OUI: none specified
Stock bootloader	U-Boot
Expansion IF types	none specified
Power	12 VDC, 1.5 A
Connector type	barrel
Serial Port (UART)	yes, 3.3V TTL, (57600 8N1)
Flags: Wave2, MU-MIMO, 256QAM
Other
Default IP address: 192.168.1.1 the IP 192.168.1.1 is used by 1359 additional devices of which 0 are Edimax devices Default login user: admin Default login password: 1234 admin:1234 credentials used by 190 additional devices of which 73 are Edimax devices
Manuf/OEM/ODM	Edimax
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Retail
FCC approval date	08 March 2017
(Est.) release date	13 April 2017
EAN	4717964701114 (UPC DB, On eBay)
ASIN	B0775D239W
Country of manuf	China
Radio 1
Chip1	MediaTek MT7615N
Wireless interface OUI	none specified
Antenna Connector Type	U.FL, RP-SMA
MIMO status	4x4:4
Wireless Standard	IEEE 802.11b/g/n
n-QAM	up to 800 Mbps
802.11n	up to 600 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	U.FL, RP-SMA
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
FCC ID Comtrend WR-5931 L9VWR5931 NDD9568771606

For a list of all currently documented MediaTek chipsets with specifications, see MediaTek.

For a list of all currently documented Edimax devices with specifications, see Edimax.

• 800 Mbps - 4SS 2.4GHz 802.11n (40MHz chan., 256-QAM),

• 1733 Mbps - 4SS 5GHz 802.11ac (80MHz chan.) = AC2600 class

Overview

"1244-01001054-50Z" is silkscreened on the board in the FCC photos.

Specifications

• Product class: AC2600 (800Mbps [2.4 GHz] + 1733Mbps [5 GHz])
• Antennas: 4x external high-gain antenna
• Ports: 1x GbE WAN, 4x GbE LAN
• Vendor firmware features: MU-MIMO, Guest Network,

VPN server: OpenVPN Server

• Vendor firmware operation modes: wireless router, access point

Links of Interest

Agregation

• On SpeedGuide
• On HardWare.info

Forum threads

• Edimax Gemini RG21S on OpenITforum (PL)

• CPU: MediaTek MT7621AT @880MHz Dual Core
• Flash: 16MB (NOR) Flash
• RAM: Nanya NT5CC64M16GP-DI (128MB DDR3)
• WLAN: 2x MediaTek MT7615N 4T4R 802.11abgn/ac

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)
On the OpenWrt Wiki

Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 21.02.0
Current supported version: 25.12.3

LAN Hardware: MediaTek MT7621AT
WLAN Hardware: 2 x MediaTek MT7615N
WLAN Comment: 4x4:4 MIMO both channels
Installation method(s):
GUI generic, U-Boot TFTP recovery
Recovery method(s):
U-Boot TFTP recovery

git • >>

ramips: add support for Edimax RG21S SoC: MediaTek MT7621AT dual-core @ 880MHz RAM: 256M (Nanya NT5CC128M) FLASH: 16MB (Macronix MX25L12835F) WiFi: - 2.4GHz MediaTek MT7615N bgn - 5GHz MediaTek MT7615N nac Switch: SoC integrated Gigabit Switch (4 x LAN, 1 x WAN) USB: No BTN: Reset, WPS LED: 4 red LEDs, indistinguishable when casing closed UART: UART is present as Pads marked J1 on the PCB. 3.3V - RX - GND - TX / 57600-8N1 3.3V is the square pad Installation ------------ Update the factory image via the OEM web-interface (by default:http://192.168.1.1) The sysupgrade image can be installed via TFTP from the U-Boot bootloader. Connect ethernet port 2. Signed-off-by: Birger Koblitz <mail@birger-koblitz.de> [flash node rename, EDIMAX -> Edimax, complete device model name] Signed-off-by: Petr Štetiar