When the accesspoint is bricked or not accessible in any normal way we can use the builtin console to send commands to the device.
Here we explain the wiring and way of working to het this device working again with the help of a USB equipped PC, a FDTI cable and 3 wires soldered to specific points inside the WR703N.
We only use the RX, TX and ground to connect to the WR703N accesspoint.
For further instructions the PDF is available.
We can use Putty, or on a Mac we have a built-in serial application screen, in our case the FTDI USB to 3.3Volt UART adapter TTL-232R-3V3 creates a device /dev/tty.usbserial-FTDJMXK4 we can connect to:
screen /dev/tty.usbserial-FTDJMXK4 115200 cs7 evenp -cstop U-Boot 1.1.4 (Feb 28 2012 - 11:58:24)
AP121 (ar9330) U-boot
DRAM: 32 MB
led turning on for 1s...
id read 0x100000ff
flash size 4194304, sector count = 64
Flash: 4 MB
Using default environment
In: serial
Out: serial
Err: serial
Net: ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
: cfg1 0x5 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
ag7240_phy_setup
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BusyBox v1.22.1 (2014-09-20 22:01:35 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.
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|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
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BARRIER BREAKER (14.07, r42625)
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* 1/2 oz Galliano Pour all ingredients into
* 4 oz cold Coffee an irish coffee mug filled
* 1 1/2 oz Dark Rum with crushed ice. Stir.
* 2 tsp. Creme de Cacao
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root@OpenWrt:/#