Haier HAR-20S2U1 / SIM SIMAX1800T

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Generic Router

Supported Versions

BrandModelVersionCurrent ReleaseOEM InfoForum SearchTechnical Data
HaierHAR-20S2U1snapshothttp://¿HAR-20S2U1View/Edit data
SIMSIMAX1800Tsnapshothttp://sim.com/cp/info.aspx?itemid=4272SIMAX1800TView/Edit data

Hardware Highlights

ModelVersionSoCCPU MHzCPU CoresFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
HAR-20S2U1MediaTek MT7621AT8802128256MediaTek MT7905DAN + MT7975DNb/g/n/axa/n/ac/ax---
SIMAX1800TMediaTek MT7621AT8802128256MediaTek MT7905DAN + MT7975DNb/g/n/axa/n/ac/ax---

Installation

ModelVersionCurrent ReleaseFirmware OpenWrt snapshot InstallFirmware OpenWrt snapshot UpgradeFirmware OEM Stock
HAR-20S2U1snapshothttps://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-haier_har-20s2u1-initramfs-factory.binhttps://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-haier_har-20s2u1-squashfs-sysupgrade.binhttp://¿
SIMAX1800Tsnapshothttps://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-sim_simax1800t-initramfs-factory.binhttps://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-sim_simax1800t-squashfs-sysupgrade.binhttps://github.com/DragonBluep/archive_openwrt/tree/main/SIM%20SIMAX1800T/Stock%20Firmware

→ Install OpenWrt (generic explanation)

TFTP Installation (initramfs image only & recommend): 

1. Set local tftp server IP: 192.168.1.254 and NetMask: 255.255.255.0
2. Rename initramfs-kernel.bin to "factory.bin" and put it in the root
   directory of the tftp server. (tftpd64 is a good choice for Windows)
3. Start the TFTP server, plug in the power supply, and wait for the
   system to boot.
4. Backup "firmware" partition and rename it to "firmware.bin", we need
   it to back to stock firmware.
5. Erase firmware partition.
   # mtd erase firmware
6. Apply sysupgrade.bin in OpenWrt LuCI or with sysupgrade command.

Web UI Installation: 

1. Apply update by uploading initramfs-factory.bin to the web UI.
2. Erase firmware partition.
   # mtd erase firmware
3. Apply squashfs-sysupgrade.bin in OpenWrt LuCI.

Recovery to stock firmware: 

a. Upload "firmware.bin" to OpenWrt /tmp, then execute:
   # mtd -r write /tmp/firmware.bin firmware
b. We can also write factory image "UploadBrush-bin.img" to firmware
   partition to recovery. Upload image file to /tmp, then execute:
   # mtd erase firmware
   # mtd -r write /tmp/UploadBrush-bin.img firmware
Tips: How to extract stock firmware image:
  Download stock firmware, then use openssl:
  openssl aes-256-cbc -d -salt -in [Downloaded_Firmware] -out "firmware.tar.tgz" -k QiLunSmartWL

Flash Layout

FIXME Find out flash layout, then add the flash layout table here (copy, paste, modify the example).

Please check out the article Flash layout. It contains examples and explanations that describe how to document the flash layout.

OEM easy installation

FIXME The instructions below are for Broadcom devices and only serve as an example.
Remove / modify them if they do not apply to this particular device!

This section deals with

  • How you install OpenWrt from a device freshly opened
  • The steps required such as reset to factory defaults if the device has already been configured

Note: Reset router to factory defaults if it has been previously configured.

  • Browse to http://192.168.1.1/Upgrade.asp
  • Upload .bin file to router
  • Wait for it to reboot
  • Telnet to 192.168.1.1 and set a root password, or browse to http://192.168.1.1 if LuCI is installed.

OEM installation using the TFTP method

→ generic.flashing.tftp

Specific values needed for tftp

FIXME Enter values for “FILL-IN” below

Bootloader tftp server IPv4 address FILL-IN
Bootloader MAC address (special) FILL-IN
Firmware tftp image Latest OpenWrt release (NOTE: Name must contain “tftp”)
TFTP transfer window FILL-IN seconds
TFTP window start approximately FILL-IN seconds after power on
TFTP client required IP address FILL-IN

Upgrading OpenWrt

→ generic.sysupgrade

LuCI Web Upgrade Process

  • Browse to http://192.168.1.1/cgi-bin/luci/mini/system/upgrade/ LuCI Upgrade URL
  • Upload image file for sysupgrade to LuCI
  • Wait for reboot

Terminal Upgrade Process

If you don't have a GUI (LuCI) available, you can alternatively upgrade via the command line. There are two command line methods for upgrading:

  • sysupgrade

Note: It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

sysupgrade

  • Login as root via SSH on 192.168.1.1, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

Debricking

→ generic.debrick

Failsafe mode

→ failsafe_and_factory_reset

Basic configuration

→ Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

Specific Configuration

FIXME Please fill in real values for this device, then remove the EXAMPLEs

Network interfaces

The default network configuration is:

Interface Name Description Default configuration
br-lan EXAMPLE LAN & WiFi EXAMPLE 192.168.1.1/24
vlan0 (eth0.0) EXAMPLE LAN ports (1 to 4) EXAMPLE None
vlan1 (eth0.1) EXAMPLE WAN port EXAMPLE DHCP
wl0 EXAMPLE WiFi EXAMPLE Disabled

Switch Ports (for VLANs)

FIXME Please fill in real values for this device, then remove the EXAMPLEs

Numbers 0-3 are Ports 1-4 as labeled on the unit, number 4 is the Internet (WAN) on the unit, 5 is the internal connection to the router itself. Don't be fooled: Port 1 on the unit is number 3 when configuring VLANs. vlan0 = eth0.0, vlan1 = eth0.1 and so on.

Port Switch port
Internet (WAN) EXAMPLE 4
LAN 1 EXAMPLE 3
LAN 2 EXAMPLE 2
LAN 3 EXAMPLE 1
LAN 4 EXAMPLE 0

Buttons

→ hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The SIM SIMAX1800T has the following buttons:

BUTTON Event
EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -

Hardware

Info

FIXME

  1. This table is automatically generated, once the correct filters for Brand and Model are set.
  2. If you see “Nothing.” instead of a table, please edit this section and adjust the filters with the proper Brand and Model. Just try, it's easy.
  3. If you still don't see a table here, or a table filled with '¿': Is there already a Techdata page available for SIM SIMAX1800T ? If not: Create one.
  4. If you see a table with the desired device data, everything is OK and you can delete this text and the <WRAP> that encloses it.
  5. If it still doesn't work: Don't panic, calm down, take a deep breath and contact a wiki admin (tmomas) for help.
Nothing.

Photos

Front:
Insert photo of front of the casing

Back:
Insert photo of back of the casing

Backside label:
Insert photo of backside label

Opening the case

Note: This will void your warranty!

FIXME Describe what needs to be done to open the device, e.g. remove rubber feet, adhesive labels, screws, …

  • To remove the cover and open the device, do a/b/c

Main PCB:
Insert photo of PCB

Serial

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

How to connect to the Serial Port of this specific device:
Insert photo of PCB with markings for serial port

FIXME Replace EXAMPLE by real values.

Serial connection parameters
for SIM SIMAX1800T @@Version@@ 		EXAMPLE 115200, 8N1, 3.3V

JTAG

→ port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port

Bootloader mods

→ bootloader

Hardware mods

None so far.

Bootlogs

OEM bootlog

COPY HERE THE BOOTLOG WITH THE ORIGINAL FIRMWARE


OpenWrt bootlog

COPY HERE THE BOOTLOG ONCE OPENWRT IS INSTALLED AND RUNNING


Notes

Space for additional notes, links to forum threads or other resources.

  • …

Tags

FIXME Add tags below, then remove this fixme.

How to add tags

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  • Last modified: 2023/02/18 04:51
  • by tmomas