Radxa CM3 IO OpenWrt Firmware
- CPU
- Rockchip RK3566
- RAM
- 2048 MB
- Flash
- eMMC, microSDXC
The Radxa CM3 IO is supported by OpenWrt on the rockchip/armv8 target. 2 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 | Rockchip RK3566 |
|---|---|
| CPU cores | 4 |
| CPU frequency | 1800 MHz |
| RAM | 2048 MB |
| Flash | eMMC, microSDXC |
| 1 Gbit Ethernet ports | 1 |
| WLAN hardware | Cypress CYW43455 (AzureWave AW-CM256SM) |
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 | rockchip/armv8 | radxa_cm3-io |
Downloads
Download images
OpenWrt 25.12.5 · rockchip/armv8
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-rockchip-armv8-radxa_cm3-io-ext4-sysupgrade.img.gz Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | 628f49d46afb… |
| openwrt-25.12.5-rockchip-armv8-radxa_cm3-io-squashfs-sysupgrade.img.gz Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | 1a842ffb60bb… |
Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the Radxa CM3 IO ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
Target default packages (29)
apk-mbedtls base-files ca-bundle dnsmasq dropbear e2fsprogs firewall4 fstools kmod-gpio-button-hotplug kmod-nft-offload libc libgcc libustream-mbedtls logd mkf2fs mtd netifd nftables odhcp6c odhcpd-ipv6only partx-utils ppp ppp-mod-pppoe procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd
Installation notes
- Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
- Verify your download against the published checksum before flashing:
$ sha256sum openwrt-25.12.5-rockchip-armv8-radxa_cm3-io-ext4-sysupgrade.img.gz 628f49d46afb85bfd05596dacab139dd571004f4a35b8b353954c8d731ecd8a9 openwrt-25.12.5-rockchip-armv8-radxa_cm3-io-ext4-sysupgrade.img.gz
Build custom firmware
Need more than the default image for the Radxa CM3 IO? 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 Radxa devices
- Radxa E20C OpenWrt firmware
- Radxa E25 OpenWrt firmware
- Radxa E52C OpenWrt firmware
- Radxa ROCK 2A OpenWrt firmware
- Radxa ROCK 2F OpenWrt firmware
- Radxa ROCK 3A OpenWrt firmware
- Radxa ROCK 3B OpenWrt firmware
- Radxa ROCK 3C OpenWrt firmware
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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.