Huawei EchoLife HG622u

The HG622 is an ADSL wifi router mainly distributed by O2_Czech_Republic to their customers.

This device is NOT RECOMMENDED for future use with OpenWrt due to low flash/ram.
DO NOT BUY DEVICES WITH 4MB FLASH / 32MB RAM if you intend to flash an up-to-date and secure OpenWrt version onto it! See 4/32 warning for details.

1) This device does not have sufficient resources (flash and/or RAM) to provide secure and reliable operation.
This means that even setting a password or changing simple network settings might not be possible any more, rendering the device effectively useless. See OpenWrt on 4/32 devices what you can do now.

2) OpenWrt support for this device has ended in 2022.
19.07.10 was the last official build for 4/32 devices.

DSL will not work at all on devices with BCM63xx DSL chipset (due to unavailability of FLOSS driver for Broadcom chips). Consider this when choosing a device to buy, or when deciding to flash OpenWrt on your device because it is listed as supported.
See Broadcom DSL, Unsupported: DSL modem and Broadcom BCM63xx for details.

Brand	Model	Version	Current Release	OEM Info	Forum Topic	Technical Data
Huawei	HG622u		22.03.5	https://www.o2.cz/osobni/techzona-modemy-pro-adsl-vdsl/huawei-echolife-hg622u.html		View/Edit data

Unsupported Functions
DSL modem

Model	Version	SoC	CPU MHz	Flash MB	RAM MB	WLAN Hardware	WLAN2.4	WLAN5.0	100M ports	Gbit ports	Modem	USB
HG622u		Broadcom BCM6368	400	8	32	Ralink RT3062	b/g/n	-	4		xDSL	1x 2.0

Model	Version	Current Release	Firmware OpenWrt Install	Firmware OpenWrt Upgrade	Firmware OEM Stock
HG622u		22.03.5	https://downloads.openwrt.org/releases/22.03.5/targets/bcm63xx/smp/openwrt-22.03.5-bcm63xx-smp-huawei_echolife-hg655b-squashfs-cfe.bin		https://www.o2.cz/osobni/techzona-modemy-pro-adsl-vdsl/huawei-echolife-hg622u.html?tab=download

→ Install OpenWrt (generic explanation)

A serial (UART) adapter is required to install OpenWrt.

For installing the Openwrt firmware you will need to use the CFE serial console:

Connect a serial TTL cable to send commands to CFE via serial console software, for loading the firmware via TFTP.
Start a TFTP server in your PC. Copy the firmware.bin file to the TFTP server's directory.
Set the IP at your pc to 192.168.1.35 (or any compatible), and connect the ethernet cable to the router.
Power ON the router, press any key in the serial console to break into the CFE command line interpreter.
Execute the command: f 192.168.1.35:firmware.bin

This is a session of flashing via TFTP:

CFE> f 192.168.1.35:firmware.bin
Loading 192.168.1.35:firmware.bin ...
Finished loading 2686980 bytes

Flashing root file system and kernel at 0xb8020000: ............................................

.
*** Image flash done *** !
Resetting board...\0xff

Please check out the article flash.layout. It contains an example and a couple of explanations.

partition	name	filesystem	function
mtd0	CFE	n/a	bootloader
mtd1	kernel	RAM executable	kernel
mtd2	rootfs	squashfs	root
mtd3	rootfs_data	jffs2	configuration, install new packages
mtd4	cal_data	n/a	wifi calibration data RT3062F eeprom is at 0x0FA0000 offset.
mtd5	nvram	n/a	OEM configuration data
mtd6	linux	n/a	OpenWrt upgrade

Instruction set	MIPS
Vendor	Broadcom
bootloader	cfe
Board ID	96368MVWG_hg622
System-On-Chip	Broadcom BCM6368
CPU/Speed	BMIPS4350 v3.1 dual core / 400 MHz
Flash-Chip	MX29GL128EHT2I-90G / 128KB block size x 128 blocks
Flash size	8 MiB
RAM	32 MiB / DDR-400
Wireless	Ralink RT3062 802.11b/g/n (onboard)
Antenna	2x PCB
Ethernet	Broadcom integrated, fast ethernet
USB	1 x USB2.0
ADSL Modem	Yes, NOT SUPPORTED
Power adapter	?
Serial	Yes
JTAG	Yes

→ port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:

J4
TX
GND
VCC
nc
RX

Serial works at 3.3V 115200 8N1, see pin assignments above

Speed (baud) - 115200 Data bits - 8 Stop bits - 1 Parity - None Flow control - None

LEDs

Read: System configuration: Leds to configure the leds

GPIO	symbol	Active
2	adsl	Low
5	inet	Low
11	usb	Low
22	power	Low
6 (PINMUX_EPHY0_ACT_LED)	lan1	Low
7 (PINMUX_EPHY1_ACT_LED)	lan2	Low
8 (PINMUX_EPHY2_ACT_LED)	lan3	Low
9 (PINMUX_EPHY3_ACT_LED)	lan4	Low

Buttons

→ hardware.button on howto use and configure the hardware button(s).

BUTTON	Event	GPIO
RESET	reset	34
WPS		12
WLAN		23

bootloader	download link	description
CFE	CFE-HG622-CUSTOM.bin	moded bootloader: web interface added, reset button detect for stopping the bootloader, no double image, no rootfs CRC check

How to add tags

bcm63xx, BCM6368, 8Flash, 32RAM, TRNG, CFE, xdsl

bcm63xx bcm6368 8Flash 32RAM trng cfe xdsl

Huawei EchoLife HG622u

Supported Versions

Hardware Highlights

Installation

OEM installation using the TFTP method

Flash Layout

Hardware

Info

PCB pictures

Serial

GPIOs

LEDs

Buttons

Bootloader mods

Tags