Unofficial OpenWrt 25.12 (Linux 6.12) for the white SFR Neufbox 6 "Box Évolution" (NB6-SER-r0)
integrated Wi-Fi · front LEDs · ECO button · gigabit switch · WireGuard. None of these worked in the last official build (23.05).

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Why

The Neufbox 6 was SFR's ADSL/fibre box in the 2010s. Thousands ended up as e-waste. OpenWrt supported it up to 23.05, then dropped the whole bcm63xx target. This project moves the box to the modern bmips target and goes further than the official port ever did:

	OpenWrt 23.05 (official, last)	neufbox6-openwrt
OpenWrt / Linux	23.05 / 5.15	25.12 / 6.12
Security updates	❌ end of life	✅ follows the 25.12 branch
Integrated Wi-Fi	❌	✅ access point, WPA2
Front LEDs (a/b/c, wan, voip, wlan)	❌	✅ with status meanings
ECO button	❌	✅ VPN on/off
Sensors (temperature, voltage)	❌	✅
Gigabit switch, USB, WAN "Fibre" port	✅	✅

Hardware

BCM6362 @ 400 MHz · 64 MB RAM · 16 MB SPI NOR · Realtek RTL8367R gigabit switch · BCM6362 integrated 2.4 GHz radio · SFR LED/sensor microcontroller on I²C. Full details, GPIO map, flash layout and the microcontroller's registers: docs/HARDWARE.md.

LEDs and buttons

Tested on real hardware: LED colours and order, SFR spiral, ECO button, Wi-Fi switch, sensors (51 °C, 12.2 V). Work in progress: WPS (switch pushed past "on") is detected but does not start pairing yet, because hostapd in OpenWrt 25.12 exposes no per-interface WPS call here. See docs/LEDS-BUTTONS.md.

• SFR button → the three top LEDs turn into a rotating green / orange / red spiral; press again for the status view.
• ECO button → turns the WireGuard VPN (interface vpn) on and off; LED b shows the tunnel state.
• Wi-Fi switch → radio on / off; pushed further → WPS (work in progress).

More in docs/LEDS-BUTTONS.md.

Integrated Wi-Fi

The BCM6362's on-chip radio never worked under OpenWrt. It now runs with the open b43 driver thanks to Alessio Ferri's 2026 work on the same SoC, Linux mainline patches, and the Neufbox's own radio calibration recovered from the SFR firmware. 2.4 GHz access point, WPA2, 802.11g rates, 0 % packet loss in tests. 5 GHz is physically absent on this board. → docs/WIFI.md

Getting started

1. Build (Docker)

git clone https://github.com/JavaScript-X/neufbox6-openwrt.git
cd neufbox6-openwrt
docker build -t nb6-builder docker/
docker run --rm --network host -v "$PWD":/port:ro -v "$HOME/nb6-work":/work nb6-builder /port/scripts/build.sh

Images land in ~/nb6-work/openwrt/bin/targets/bmips/bcm6362/. → docs/BUILD.md

2. First flash (serial console + TFTP)

The stock CFE bootloader is kept: interrupt it on the serial console and flash …-squashfs-cfe.bin over TFTP. → docs/FLASHING.md

3. Updates

sysupgrade with …-squashfs-sysupgrade.bin (LuCI or command line), settings kept.

How it boots

The 2010 CFE bootloader can only unpack ~4 MB and lives in the middle of RAM, while the 6.12 kernel is 11 MB. The image therefore ships a small lzma-loader that CFE unpacks first, which then unpacks the kernel itself.

Repository

assets/            photos and diagrams used in this README
config/nb6.config  OpenWrt target and package selection
docker/            Debian 12 build environment
docs/              hardware, build, flashing, Wi-Fi, LEDs, porting journal
files/             added to the image: LED daemon, button handlers, first-boot defaults
patches/board/     device tree, image recipe, RTL8367R RGMII fix, nb6-hwmon LED driver
patches/wifi/      BCM6362 WLAN: bcma host, b43 N-PHY r8 / radio 2057 r8, firmware, calibration
scripts/           build.sh, apply-board.sh, apply-wifi.sh
tools/             serial / CFE / TFTP / GPIO helpers used for flashing and probing

Limits

• Experimental: first flash needs a 3.3 V serial adapter; keep it for recovery.
• Wi-Fi: 2.4 GHz only, 802.11g rates for now (b43's 802.11n support for this radio is unfinished).
• No ADSL/VDSL, no VoIP (closed Broadcom drivers).
• Kernel modules from the official package feed do not match this kernel: add them to config/nb6.config and rebuild.

Credits

• Álvaro Fernández Rojas (noltari) wrote the bmips target and the original nb6-hwmon LED/sensor driver (2020).
• Alessio Ferri added BCM6362 integrated WLAN support: bcma SoC host, b43 N-PHY rev 8 / radio 2057 rev 8, firmware extraction (2026).
• Miguel Gaio / Efixo did the original Neufbox OpenWrt work and the RTL8367R RGMII fix.
• The OpenWrt and Linux communities.

Third-party patches keep their original authorship and trailers. SFR firmware images and calibration files are not distributed here.

Product photos of the Neufbox 6 in assets/banner-openwrt.png, assets/leds-buttons.png and assets/hardware.png: © SFR, annotated for this project. Neufbox and SFR are trademarks of SFR; this project is not affiliated with SFR. The OpenWrt logo in assets/banner-openwrt.png is by the OpenWrt project, CC BY-SA 4.0 (shown in its white variant for the dark background); OpenWrt is a registered trademark of Software Freedom Conservancy.

Licence

GPL-2.0-or-later, see LICENSE.