TP-Link Archer D7 AC1750

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Dual Band (concurrent), Gigabit Ethernet and ADSL Modem. Advertised as 1750 Mbps. It has simultaneous Triple-Stream (3×3) radios on both 2.4GHz and 5 GHz Bands. It supports 802.11n in 2.4GHz for 450Mbps throughput and IEEE 802.11ac (draft) for 1300Mbps throughput in 5GHz.

This modem is practically divided in 2 sections:

DSL will not work at all on devices with BCM63xx DSL chipset (due to unavailability of FLOSS driver for Broadcom chips). Consider this when chosing 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.

ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
Archer D7 / D7bv1Qualcomm Atheros QCA955877516128Qualcomm Atheros QCA9558, Qualcomm Atheros QCA9880-BR4Ab/g/na/n/ac-4ADSL2+2x 2.0
Architecture MIPS32 (MIPS74Kc)
Target ar7xxx/ar9xxx
Vendor TP-Link
Bootloader uboot
CPU Model QCA9558
CPU Speed 720MHz
Flash chip Winbond 25Q128FVSG (128 Mibit)
Flash size 16 MiB
RAM chip 2x Winbond W9751G6KB-25 (512 Mibit each)
RAM size 128 MiB
WAN In the original firmware LAN4 can act as WAN
Switch AR8327N-BL1A
Ethernet QCA8337 (4xGbe)
Wireless QCA9558 (Integrated 2.4GHz) + QCA9880-BR4A (5GHz)
Serial yes (see picture below)
Buttons power switch, WPS button, Wifi on/off
Power external 12V 2,5A

J1

•  VCC
•  GND
•  RX
▣ TX

Configure your favorite terminal with the following settings: 115200 baud, 8 bit, no parity, 1 stop bit, no flow control.

To enter into the bootloader, press “t” when it says: “Hit any key to stop autoboot”

Default user and password for console login inside the original OEM firmware is admin/1234

Since opening the case is relatively hard (because of the hard to remove silver clip and strong plastic clips), the easiest way to gain Serial access is by using some snips to cut out part of the case.

To open the case you have to remove two screws underneath the information sticker and one screw below the silver front clip which should push forward, then you need to pry open the rest of the case which is clipped together (2×3 side clips; 2 front clips; 2 back clips).

~ # cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00020000 00010000 "u-boot"
mtd1: 00140000 00010000 "kernel"
mtd2: 00e50000 00010000 "rootfs"
mtd3: 00010000 00010000 "radioDECT"
mtd4: 00010000 00010000 "config"
mtd5: 00010000 00010000 "romfs"
mtd6: 00010000 00010000 "rom"
mtd7: 00010000 00010000 "radio"
Architecture MIPS32 (MIPS74Kc)
Target brcm63xx
Bootloader CFE
CPU Model BCM6318
CPU Speed 333MHz
Flash chip Winbond 25Q16DVSIG (16 Mibit)
Flash size 2 MiB
RAM chip ESMT M12L128168A (128 Mibit)
RAM size 16 MiB
WAN RJ-11
Serial yes (see picture below)

J41

•  VCC
•  GND
•  RX
▣ TX

Default user and password for console login inside the original OEM firmware is admin/admin

# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 0011d000 00000000 "BCM63XX RootFS"

Developers are currently working on OpenWrt for this router Here. The following tutorial allows only a complete shell access to the router. When the firmware will be ready for this router, this page will be updated with a proper guide.

This hack is the same used for the w8970/w9980 https://forum.kitz.co.uk/index.php?topic=17108.105.

Prerequisites

You'll need python3 and pycrypto to run this script. You can install pycrypto by:

  • apt install python3-crypto
  • OR pip install pycrypto
  • OR pip install pycryptodome

Download this python script: https://github.com/sta-c0000/tpconf_bin_xml/blob/master/tpconf_bin_xml.py

Guide
  1. Download the system configuration from the OEM interface (System Tools → Backup & Restore → Backup)
  2. Rename it in “config.bin” (if necessary) and copy it in the same folder of the tpconf_bin_xml.py script.
  3. Execute
    python3 tpconf_bin_xml.py -n conf.bin conf.xml
  4. Open the conf.xml file with a text editor and add the following line inside the “<DeviceInfo>” tag:
    <Description val="Modem Router`telnetd -p 1023 -l login`" />
    1. Before
      <?xml version="1.0"?>
      <DslCpeConfig>
        <InternetGatewayDevice>
          <DeviceSummary val="InternetGatewayDevice:1.1[](Baseline:1, EthernetLAN:1)" />
          <LANDeviceNumberOfEntries val=1 />
          <DeviceInfo>
            <ManufacturerOUI val=XXXXXX />
            <SerialNumber val=XXXXXXXXXXXXX />
            <HardwareVersion val="Archer D7 v1 00000002" />
            <SoftwareVersion val="1.6.0 0.9.1 v002d.0 Build 160216 Rel.57110n" />
            <UpTime val=4 />
            <X_TP_IsFD val=3 />
          </DeviceInfo>
          ...
    2. After
      <?xml version="1.0"?>
      <DslCpeConfig>
        <InternetGatewayDevice>
          <DeviceSummary val="InternetGatewayDevice:1.1[](Baseline:1, EthernetLAN:1)" />
          <LANDeviceNumberOfEntries val=1 />
          <DeviceInfo>
            <ManufacturerOUI val=XXXXXX />
            <SerialNumber val=XXXXXXXXXXXXX />
            <HardwareVersion val="Archer D7 v1 00000002" />
            <SoftwareVersion val="1.6.0 0.9.1 v002d.0 Build 160216 Rel.57110n" />
            <UpTime val=4 />
            <X_TP_IsFD val=3 />
            <Description val="Modem Router`telnetd -p 1023 -l login`" />
          </DeviceInfo>
          ....
  5. After editing the conf.xml file it must be coverted back the configuration file using the previous python script:
    python3 tpconf_bin_xml.py conf.xml conf_new.bin
  6. Restore the modem's configuration using this new conf_new.bin file. (System Tools → Backup & Restore → Restore)
  7. Now you are able to connect to the router using telnet on port 1023:
    telnet 192.168.1.1 1023
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  • Last modified: 2021/04/18 21:33
  • by tmomas