Kobol Helios4 OpenWrt Firmware
- CPU
- Marvell Armada 388 88F6828
- RAM
- 2048 MB
- Flash
- 4, microSDXC MB
The Kobol Helios4 is supported by OpenWrt on the mvebu/cortexa9 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.
Specs
Specifications
| CPU | Marvell Armada 388 88F6828 |
|---|---|
| CPU cores | 2 |
| CPU frequency | 1600 MHz |
| RAM | 2048 MB |
| Flash | 4, microSDXC MB |
| 1 Gbit Ethernet ports | 1 |
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 | mvebu/cortexa9 | kobol_helios4 |
Downloads
Download images
OpenWrt 25.12.5 · mvebu/cortexa9
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-mvebu-cortexa9-kobol_helios4-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery. | kernel | 03d2d634e703… |
| openwrt-25.12.5-mvebu-cortexa9-kobol_helios4-squashfs-sdcard.img.gz Disk image to write onto an SD card. | sdcard | e9317ccc117f… |
| openwrt-25.12.5-mvebu-cortexa9-kobol_helios4-targz-rootfs.tar.gz Rootfs archive for Docker / LXC containers. | rootfs | 162e2f8c9113… |
Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the Kobol Helios4 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
Device packages (3)
mkf2fs e2fsprogs partx-utils
Target default packages (26)
apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-gpio-button-hotplug 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
Installation notes
- 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-mvebu-cortexa9-kobol_helios4-initramfs-kernel.bin 03d2d634e703bd3439fc9bf4e3c81903d2777d06c5ad727e9f1f3bd1a7c61db0 openwrt-25.12.5-mvebu-cortexa9-kobol_helios4-initramfs-kernel.bin
Build custom firmware
Need more than the default image for the Kobol Helios4? 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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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.