Huawei EchoLife HG622u
The HG622 is an ADSL wifi router mainly distributed by O2_Czech_Republic to their customers.
Supported Versions
Hardware Highlights
Installation
Installation using a modded CFE bootloader
It seems the original bootloader doesn't allow to boot OpenWrt images, see → Huawei EchoLife HG622u corrupted image. You will need to upgrade the CFE bootloader with a modded one before installing OpenWrt.
CFE_HG622-dummy_firmware.bin (dummy firmware, only CFE and void firmware)
Upgrade the bootloader via TFTP using the serial console:
CFE> f 192.168.1.100:CFE_HG622-dummy_firmware.bin Loading 192.168.1.100:CFE_HG622-dummy_firmware.bin ... Finished loading 87360 bytes Flashing CFE: ..
After upgrading CFE you will have a web server at http://192.168.1.1/ for uploading new firmwares. You only need to upgrade the CFE once, the bootloader will remain forever installed.
It's recommendable to install an old Openwrt version to avoid running out of memory. But don't install any version between 17.01.5 and 18.06.3 (both included), they likely erase the wifi caldata partition. Version 17.01.4 should run fine:
Firmwares from HG622 (not u) model aren't compatible with this device due to bigger flash size (16MB). We use images from the HG655b model (8MB flash).
Install OpenWrt via new CFE:
- After power power cycling the device, press the reset button when powering on the router and wait some seconds
- Release the reset button
- Browse to
http://192.168.1.1/. - Install OpenWrt binary image.
OEM installation using the TFTP method
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
Flash Layout
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 |
Hardware
Info
| 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 |
PCB pictures
Serial
→ 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 |
GPIOs
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 mods
| 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 |