SmartRG SR400ac OpenWrt Firmware
- CPU
- Broadcom BCM4708A0
- RAM
- 256 MB
- Flash
- 32 MB
The SmartRG SR400ac is supported by OpenWrt/ImmortalWrt on the bcm53xx/generic target. 2 firmware images are available from the official OpenWrt 25.12.5 and ImmortalWrt 25.12.1 stable releases — download one below, or build a custom OpenWrt image for this device with your own package selection.
Specs
Specifications
| CPU | Broadcom BCM4708A0 |
|---|---|
| CPU cores | 2 |
| CPU frequency | 800 MHz |
| RAM | 256 MB |
| Flash | 32 MB |
| 1 Gbit Ethernet ports | 5 |
| WLAN hardware | 2x Broadcom BCM43602 |
Hardware data from the OpenWrt Table of Hardware; verify against your unit before flashing.
Build matrix
Supported firmware versions
| Distribution | Version | Target | Profile |
|---|---|---|---|
| OpenWrt | 25.12.5 | bcm53xx/generic | smartrg_sr400ac |
| ImmortalWrt | 25.12.1 | bcm53xx/generic | smartrg_sr400ac |
Downloads
Download images
OpenWrt 25.12.5 · bcm53xx/generic
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-bcm53xx-generic-smartrg_sr400ac-squashfs.trx | trx | 574cda0b2a2b… |
ImmortalWrt 25.12.1 · bcm53xx/generic
| Image | Type | sha256 |
|---|---|---|
| immortalwrt-25.12.1-bcm53xx-generic-smartrg_sr400ac-squashfs.trx | trx | c001d102b178… |
Downloads are served by the official OpenWrt/ImmortalWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the SmartRG SR400ac ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
OpenWrt 25.12.5 · bcm53xx/generic
Device packages (9)
wpad-basic-mbedtls kmod-brcmfmac brcmfmac-firmware-43602a1-pcie kmod-usb-ohci kmod-usb2 kmod-phy-bcm-ns-usb2 kmod-usb-ledtrig-usbport kmod-usb3 kmod-phy-bcm-ns-usb3
Target default packages (30)
apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables nvram odhcp6c odhcpd-ipv6only osafeloader oseama otrx ppp ppp-mod-pppoe procd-ujail uci uclient-fetch urandom-seed urngd
ImmortalWrt 25.12.1 · bcm53xx/generic
Device packages (10)
wpad-openssl kmod-brcmfmac brcmfmac-firmware-43602a1-pcie kmod-usb-ohci kmod-usb2 kmod-phy-bcm-ns-usb2 kmod-usb-ledtrig-usbport automount kmod-usb3 kmod-phy-bcm-ns-usb3
Target default packages (34)
apk-openssl base-files block-mount ca-bundle default-settings-chn dnsmasq-full dropbear firewall4 fstools kmod-gpio-button-hotplug kmod-leds-gpio kmod-nf-nathelper kmod-nft-offload libc libgcc libustream-openssl logd luci mtd netifd nftables nvram odhcp6c odhcpd-ipv6only osafeloader oseama otrx ppp ppp-mod-pppoe procd-ujail uci uclient-fetch urandom-seed urngd
Installation notes
- Verify your download against the published checksum before flashing:
$ sha256sum openwrt-25.12.5-bcm53xx-generic-smartrg_sr400ac-squashfs.trx 574cda0b2a2b00cee1466a3b40d427f0aa996d8826d9f0c34c211e51081f0896 openwrt-25.12.5-bcm53xx-generic-smartrg_sr400ac-squashfs.trx
Build custom firmware
Need more than the default image for the SmartRG SR400ac? 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
Related devices
More SmartRG devices
More devices on bcm53xx/generic
Upstream
Upstream & source
- downloads.openwrt.org — bcm53xx/generic 25.12.5
- downloads.immortalwrt.org — bcm53xx/generic 25.12.1
- OpenWrt Table of Hardware
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.