TP-Link wr841n: how to revert from openwrt to factory firmware?

Question

Arduino

I'm trying to restore the factory firmware on the router. I tried to flash through WebUI, from the console, using tftp - to no avail. Connected to uart. When run in putty it gives:

spoiler

U-Boot 1.1.4 (Feb 28 2014 - 11:27:07)
U-boot AP123
DRAM:  32 MB
Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x16
Flash:  4 MB
Using default environment
In:    serial
Out:   serial
Err:   serial
Net:   ag934x_enet_initialize...
wasp reset mask:c03300
WASP ----> S27 PHY
file: ag934x.c,line: 179==: set LAN&WAN SWAP. --debug by HouXB
GMAC: cfg1 0x80000000 cfg2 0x7114
eth0: ba:be:fa:ce:08:41
s27 reg init 
athrs27_phy_setup ATHR_PHY_CONTROL 4: 0x1000
athrs27_phy_setup ATHR_PHY_SPEC_STAUS 4: 0x10
eth0 up
WASP ----> S27 PHY
file: ag934x.c,line: 179==: set LAN&WAN SWAP. --debug by HouXB
GMAC: cfg1 0xf cfg2 0x7214
eth1: ba:be:fa:ce:08:41
s27 reg init lan 
ATHRS27: resetting s27
ATHRS27: s27 reset done
athrs27_phy_setup ATHR_PHY_CONTROL 0: 0x1000
athrs27_phy_setup ATHR_PHY_SPEC_STAUS 0: 0x10
athrs27_phy_setup ATHR_PHY_CONTROL 1: 0x1000
athrs27_phy_setup ATHR_PHY_SPEC_STAUS 1: 0x10
athrs27_phy_setup ATHR_PHY_CONTROL 2: 0x1000
athrs27_phy_setup ATHR_PHY_SPEC_STAUS 2: 0x10
athrs27_phy_setup ATHR_PHY_CONTROL 3: 0x1000
athrs27_phy_setup ATHR_PHY_SPEC_STAUS 3: 0x10
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...
   Uncompressing Kernel Image ... OK
Starting kernel ...
Booting Atheros AR934x
Linux version 2.6.31--LSDK-9.2.0_U5.508 ([email protected]) (gcc version 4.3.3 (GCC) ) #11 Thu Jul 24 17:24:48 CST 2014
flash_size passed from bootloader = 4
Ram size passed from bootloader =33554432
CPU revision is: 0001974c (MIPS 74Kc)
ath_sys_frequency: cpu srif ddr srif cpu 535 ddr 400 ahb 200
Determined physical RAM map:
 memory: 02000000 @ 00000000 (usable)
Zone PFN ranges:
  Normal   0x00000000 -> 0x00002000
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0: 0x00000000 -> 0x00002000
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 8128
Kernel command line: console=ttyS0,115200 root=31:2 rootfstype=squashfs init=/sbin/init mtdparts=ath-nor0:128k(u-boot),1024k(kernel),2816k(rootfs),64k(config),64k(art) mem=32M
PID hash table entries: 128 (order: 7, 512 bytes)
Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
Writing ErrCtl register=00000000
Readback ErrCtl register=00000000
Memory: 30124k/32768k available (1729k kernel code, 2644k reserved, 427k data, 112k init, 0k highmem)
NR_IRQS:128
plat_time_init: plat time init done
Calibrating delay loop... 267.26 BogoMIPS (lpj=534528)
Mount-cache hash table entries: 512
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
net_link: create socket ok.
TCP established hash table entries: 1024 (order: 1, 8192 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP reno registered
NET: Registered protocol family 1
ATH GPIOC major 0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
msgmni has been set to 58
io scheduler noop registered
io scheduler deadline registered (default)
Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0xb8020000 (irq = 19) is a 16550A
console [ttyS0] enabled
PPP generic driver version 2.4.2
NET: Registered protocol family 24
5 cmdlinepart partitions found on MTD device ath-nor0
Creating 5 MTD partitions on "ath-nor0":
0x000000000000-0x000000020000 : "u-boot"
0x000000020000-0x000000120000 : "kernel"
0x000000120000-0x0000003e0000 : "rootfs"
0x0000003e0000-0x0000003f0000 : "config"
0x0000003f0000-0x000000400000 : "art"
->Oops: flash id 0xef4016 . 
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
Port Status 1c000004 
ath-ehci ath-ehci.0: ATH EHCI
ath-ehci ath-ehci.0: new USB bus registered, assigned bus number 1
ehci_reset Intialize USB CONTROLLER in host mode: 13
ehci_reset Port Status 1c000000 
ath-ehci ath-ehci.0: irq 3, io mem 0x1b000000
ehci_reset Intialize USB CONTROLLER in host mode: 13
ehci_reset Port Status 1c000000 
ath-ehci ath-ehci.0: USB 2.0 started, EHCI 1.00
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
Ooops, why the devices couldnt been initialed?
TCP cubic registered
NET: Registered protocol family 17
802.1Q VLAN Support v1.8 Ben Greear <[email protected]>
All bugs added by David S. Miller <[email protected]>
athwdt_init: Registering WDT success
ath_otp_init: Registering OTP success
ath_clksw_init: Registering Clock Switch Interface success
VFS: Mounted root (squashfs filesystem) readonly on device 31:2.
Freeing unused kernel memory: 112k freed
init started:  BusyBox v1.01 (2014.07.24-09:31+0000) multi-call binary
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
This Board use 2.6.31
xt_time: kernel timezone is -0000
nf_conntrack version 0.5.0 (512 buckets, 5120 max)
Switch Wi-Fi...
ip_tables: (C) 2000-2006 Netfilter Core Team
ttyS0: 4 input overrun(s)
PPPoL2TP kernel driver, V1.0
PPTP driver version 0.8.3

и все...

In the console I tried to flash like this: mtd -r write /tmp/tplik.bin firmware I
also tried to enter the console via uart (I enter tpl at startup), but I don’t get an invitation. I connected to uart via arduino uno. What could be the problem?

Answer 1

Just answered the other day . :
Swap rx-tx
Wrong :
RX <—> RX
TX <—> TX
Correct :
RX <—> TX
TX <—> RX