Hongdian H8850 v20

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bgn (N300)
Enhanced WiFi Router
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
BrandModelRev Hongdian H8850 v20 v20
FCC ID none specified
Type wireless router
CPU1 checkY MediaTek MT7628DAN
CPU1 Type MIPS 24KEc
CPU1 Speed 580 MHz
Flash1 Chip Brand? Model?
Flash1 Size 16 MiB16,777,216 B <br />131,072 Kib <br />16,384 KiB <br />128 Mib <br />0.0156 GiB <br />
RAM1 Size 64 MiB67,108,864 B <br />524,288 Kib <br />65,536 KiB <br />512 Mib <br />0.0625 GiB <br />
RAM1 Chip Brand? Model?
ETH chip1 MediaTek MT7628DAN
Switch MediaTek MT7628DAN
Ethernet Port Count 4-100MbE-LAN
Wired Standard IEEE 802.3i/3u

802dot11 OUI: none specified

Stock bootloader U-Boot
Expansion IF types none specified
Power 5-36 VDC, 1.5 A
Serial Port (UART) yes, 3.3V TTL, (115200 8N1)

Flags:
LTE

Other
3rd Party Firmware Support OpenWrt • (List | Dev | DLs)
Radio 1
Chip1 MediaTek MT7628DAN
Chip2 MediaTek MT7628NN
Wireless interface OUI none specified
Antenna Connector Type none specified
MIMO status 2x2:2
Wireless Standard IEEE 802.11b/g/n
802.11n up to 300 Mbps
802.11g up to 54 Mbps
802.11b up to 11 Mbps
WiFi Operating Frequency 2.4 GHz

For a list of all currently documented MediaTek chipsets with specifications, see MediaTek.

300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = N300 class

Flashing

Flashing OpenWrt

Target: ramips
Subtarget: mt76x8
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 24.10.5
Current supported version: 25.12.2
LAN Hardware: MediaTek MT7628DAN
WLAN Hardware: MediaTek MT7628NN
Installation method(s):
see git-commit
Install Comment:
Original Firmware Dump / More details: https://blog.gov.cooking/archives/research-hongdian-h8850-v20-and-flash.html
git • >>
ramips: add support for Hongdian H8850 v20
This is an industrial 4G router equipped with OpenWrt SNAPSHOT OEM
customized version

WARNING: The original firmware device tree is modified from evb
boards, and the device tree name is evb board. This submitted device
tree is a modified version, which deletes the non-this-device parts
and adds GPIO watchdog.

Specification:
- SoC: MediaTek MT7628DAN
- Flash: 16 MB
- RAM: 64 MB
- Power: DC 5V-36V 1.5A
- Ethernet: 1x WAN/LAN, 3x LAN (10/100 Mbps)
- Wireless radio: 802.11n 2.4g-only
- LED:
  System/Power (PWR): Always Off
  Modem (NET): GPIO/3 active-low
  LAN: Always On
  RF (Modem Signal): GPIO/2 active-low
  WIFI: GPIO/44 active-low
- Button:
  WPS / RESET: GPIO/11 active-low
- UART: 1x UART on PCB - 115200 8N1
- GPIO Watchdog: GPIO/0 mode=toggle timeout=1s
- Modem: 1x Built-in modem on board (Power: GPIO/4 active-high)
- SIM Slots: 1x SIM Slots

Issue:
- Factory partition not store mac address on original firmware

Flash instruction:
Using TTL:
1. Connect the board to the computer via TTL.
2. Enter original firmware failsafe mode.
3. Use wget download firmware to board /tmp
4. Use command "mtd -r write openwrt-ramips-mt76x8-hongdian_h8850-v20-squashfs-sysupgrade.bin firmware"
   to flash

Original Firmware Dump / More details:
https://blog.gov.cooking/archives/research-hongdian-h8850-v20-and-flash.html