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adding instructions for using serial to run tftp for successful flash of sudowrt
This will cause the [https://wiki.openwrt.org/doc/techref/bootloader/uboot U-Boot] bootloader to drop into a command line.
==== Transfering file to U-Boot over Serial Running TFTPd ====
Although U-Boot supports can support two protocols for transfering files: , kermit or y-modem. Minicom , the bootloader does not support the kermit <tt>loadb</tt> or <tt>loady</tt>. Minicom only supports y-modem protocol. We do not have to resort to a direct serial file transfer however.  ar7240> mtdparts default ar7240> urescue Setting default IP 192.168.1.20 Starting TFTP server... Using eth0 (192.168.1.20), address: 0x81000000 Waiting for connection: \ In your other terminal window, run the ubi-flasher script.  $ ./flasher.js /home/redconfetti/Projects/mesh/openwrt-images/nanostation-m5/2015-2016/openwrt-ar71xx-generic-ubnt-nano-m-xw-squashfs-factory.bin Accessing http://192.168.1.20/login.cgi Connection timed out Sending /home/redconfetti/Projects/mesh/openwrt-images/nanostation-m5/2015-2016/openwrt-ar71xx-generic-ubnt-nano-m-xw-squashfs-factory.bin to 192.168.1.20 using tftp put Firmware flashing begun! The firmware has been successfully sent to the router. In a few seconds, the router should begin flashing its four status LEDs sweeping from left to right, then right to left (or up down, down up). This means that the router is flashing itself with the new firmware. Once the router goes back to having only the power LED lit, the router has been successfully flashed. In the terminal running Minicom you should see the firmware successfully flashing.  Receiving file from 192.168.1.10:52289 Received 4325788 bytes Firmware Version: XW.ar934x.v6.0.0-OpenWrt-r47662 Setting U-Boot environment variables Un-Protected 1 sectors Erasing Flash.... done Erased 1 sectors Writing to Flash... write addr: 9f040000 done Protected 1 sectors Copying partition 'kernel' to flash memory: First 0x5 last 0x14 sector size 0x10000 ................ done write addr: 9f050000 Copying partition 'rootfs' to flash memory: First 0x15 last 0x6e sector size 0x10000 .......................................................................................... done write addr: 9f150000 Firmware update complete. Resetting... U-Boot 1.1.4-s958 (Jun 10 2015 - 10:56:20) DRAM: 64 MB Flash: 8 MB (0xc2, 0x20, 0x17) Net: AR8236 eth0, eth1 Board: Ubiquiti Networks AR9342 board (e855-22585.1122.0030) Radio: 0777:e855 Reset: Normal Hit any key to stop autoboot: 0 ## Booting image at 9f050000 ... Image Name: MIPS OpenWrt Linux-3.18.23 Created: 2015-12-01 0:03:51 UTC Image Type: MIPS Linux Kernel Image (lzma compressed) Data Size: 1135619 Bytes = 1.1 MB Load Address: 80060000 Entry Point: 80060000 Verifying Checksum at 0x9f050040 ...OK Uncompressing Kernel Image ... OK Starting kernel ... [ 0.000000] Linux version 3.18.23 (sudowrt-builder@build-test2) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r47662) ) #2 Mon Nov 5 After it reboots if you see the first line mention 'sudowrt-builder', however the device is booting the SudoWRT firmware build. You can press ENTER once it is finished, and it does support should drop into the command line for the ySudoWRT system.  [ 25.650000] jffs2: Newly-erased block contained word 0xdeadc0de at offset 0x00000000 [ 25.660000] done. [ 25.660000] jffs2: notice: (993) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and. BusyBox v1.23.2 (2015-11-30 18:48:50 EST) built-in shell (ash) ._______.___ ._______.______ ._____ .___ .___ .______ ._____ :_ ____/| | : .____/:_ _ \ :_ ___\ | | : __|: \ :_ ___\ | _/ | | | : _/\ | | || |___| | | : || || |___ | | | |/\ | / \| . | || / || |/\ | || | || / | |_. | | / \|_.: __/|. ____/ |. __ || / \| ||___| ||. __ | :/ |______/ :/ :/ :/ |. ||______/|___| |___| :/ |. | : : : :/ : :/ : : ------------------------------------------------------------------------- sudo mesh v0.2 (fledgling.extender) based on OpenWRT 15.05 (Chaos Calmer) ------------------------------------------------------------------------- “When your rage is choking you, it is best to say nothing.” -modem protocolOctavia E.Butler, Fledgling ------------------------------------------------------------------------- root@sudomesh-node:/#
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