Edimax Gemini AC2600 RG21S OpenWrt Firmware
The Edimax Gemini AC2600 RG21S is supported by OpenWrt on the ramips/mt7621 target. 3 firmware images are available from the official OpenWrt 25.12.5 stable release — download one below, or build a custom OpenWrt image for this device with your own package selection.
Build matrix
Supported firmware versions
| Distribution | Version | Target | Profile |
|---|---|---|---|
| OpenWrt | 25.12.5 | ramips/mt7621 | edimax_rg21s |
Downloads
Download images
OpenWrt 25.12.5 · ramips/mt7621
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-ramips-mt7621-edimax_rg21s-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery. | kernel | fc867cdda6b2… |
| openwrt-25.12.5-ramips-mt7621-edimax_rg21s-squashfs-factory.bin For first-time flash from stock firmware. | factory | 9fe2ae17bd61… |
| openwrt-25.12.5-ramips-mt7621-edimax_rg21s-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | c507ecb56245… |
Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the Edimax Gemini AC2600 RG21S ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
Device packages (2)
kmod-mt7615-firmware -uboot-envtools
Target default packages (29)
apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-crypto-hw-eip93 kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd wpad-basic-mbedtls
Installation notes
- First install from stock firmware: flash the factoryimage through the vendor firmware's upgrade page or recovery mode.
- Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
- The kernel / initramfs image boots from RAM without writing to flash — useful for a first install or for recovering from a failed flash.
- Verify your download against the published checksum before flashing:
$ sha256sum openwrt-25.12.5-ramips-mt7621-edimax_rg21s-initramfs-kernel.bin fc867cdda6b256c58f8b41a620b1869851d782edeecdd4d2e9cd07bc1614618a openwrt-25.12.5-ramips-mt7621-edimax_rg21s-initramfs-kernel.bin
Build custom firmware
Need more than the default image for the Edimax Gemini AC2600 RG21S? Pick your packages — LuCI apps, themes, VPN clients — set the basics, and get a ready-to-flash OpenWrt image assembled from official packages in minutes.
Customize firmware for this deviceRelated
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More devices on ramips/mt7621
Upstream
Upstream & source
Images are assembled from packages compiled and published by the upstream OpenWrt and ImmortalWrt projects. The complete corresponding source code is available from those projects under the GPL.