C6v2(US) Bricked Repair.md

Archer C6 v2 (US) Repair

⚠️ do not use the values directly form this documentation, find the values following the process

Tools Required

1. Soldering Iron
2. Soldering wire
3. 4/3 Pin header
4. Jumper Wires(F2M,M2M)
5. FTDI Breakout/USBtoTTL
6. Switch/Router(extra)
7. Ethernet Cable 2
8. Multimeter

Identifiying UART ports

Soldering

1. Solder pin header (Motherboard)

Identifiying Ports

Use copper holes (large) / antenna as gnd source

Voltage Check

UART	Value	Guess
1st	3.3V	VCC(3V)
2nd	~0	GND/RX
3rd	~0	GND/RX
4th	~2.6	TX

Continuity Test

UART	Value	Guess
2nd	Beeps	GND
3rd	Does not beep	RX

UART

[-] 3.3V
[-] GND
[-] RX
[x] TX <-

Connecting FTDI

UART	FTDI
GND	GND
TX	RX
RX	TX

Reading Serial Input

1. Insatll picocom/arduino
2. Baud rate : 115200

picocom -b 115200 /dev/ttyUSB0

TFTP

Requires Switch (100mbps)

Switch/ Router setup (openwrt)

1. Install ethtool
2. Change speed of all ports

ethtool -s lan1 speed 100
ethtool -s lan1 speed 100
ethtool -s lan1 speed 100
ethtool -s lan1 speed 100

PC Connection

1. Change PC IP to 192.168.0.66

Installing TFTP

1. Installing

pacman -S tftp-hpa

2. Edit /etc/conf.d/tftpd

TFTPD_ARGS="--secure /home/zihad/.tftpgui/tftproot"

Change /home/zihad/.tftpgui/tftproot to any folder 3. Start the service

systemctl start tftpd.service

Finding filename

Initiating TFTP

0. Monitor serial
1. Power off
2. Press the reset button
3. Power on
4. See WPS Light On
5. Release reset button

Finding filename

1. Check serial for filename

Filename ArcherA6v2_tp_recovery.bin

Placing File

1. Download official firmware
2. Rename file to filename found in Finding Filename
3. Place that file to the tftproot folder

Process

Archer C6 V2 <=> Switch/Router (negotiation 100mbps all ports) <=> PC (100mbps)

1. Power off
2. Press the reset button
3. Power on
4. See WPS Light On
5. Release rest button
6. Wait for flash (check UART)