Power through the mini-USB connector is always required for operation. No significant current and power flows through the micro-serial port (see Serial port user. No less than 900mA of current (which, with 5V voltage, means 4.5 Watts of power). Using JeVois with an OpenWRT computer to stream video over WIFI. Possible issues: this port is owned by both kernel (console=ttyATH0,115200) and init processes (see /etc/inittab), that means, that even if can use the port, kernel messages can interfere with your data.
Hi, edit. I have flashed a wr741ndV1 with backfire factory image and all worked perfect. Because there was not enough space for openvpn I have made a customized image with image builder ar71xx (10.03).
The Image build fine without failure and I flashed the sysupgrade image for wr741ndv1 with the Luci Interface of backfire 10.03. Bootup looks normal and sys was first blinking and than steady but I could not connect to the router. I have tried failsave mode with the QSS Button and sys was blinking constantly fast but as well no connection to the router. As far as I could find in the forum the recovery over serial console is the only way. Although I use openwrt many years I never got the dilemma to use the serial console. I am pretty new to the serial topic and have of course read what I could find at the wiki and in the forum but I would really need a little help because I could not find to much about the wr741nd.
I assume that some geeks already has experience with the wr741nd serial console and could tell me the pin layout of the SJ1 connector. Also I have read that the TTL Signal could be 3,3 Volt is that right? As level shifter I have ordered the Nokia CA-42 USB cable and I hope that it will work for this device. It would be very helpful and nice if somebody could give me a helping hand. Thx a lot tom (Last edited by supertom64 on 28 May 2010, 20:21).
HI,i hope you can help I have bricked wr741nd,i can get into serial console(via made up cable ca-)42,and into uboot console with tpl command/hack. I get this below U-Boot 1.1.4 (Mar 8 2010 - 10:29:42) AP91 (ar7240) U-boot DRAM: sri #### TAP VALUE 1 = a, 2 = b 32 MB id read 0x100000ff flash size 4194304, sector count = 64 Flash: 4 MB Using default environment In: serial Out: serial Err: serial Net: ag7240enetinitialize. No valid address in Flash.
Using fixed address: cfg1 0xf cfg2 0x7014 eth0: 00:03:7f:09:0b:ad eth0 up No valid address in Flash. Using fixed address: cfg1 0xf cfg2 0x7214 eth1: 00:03:7f:09:0b:ad ATHRS26: resetting s26 ATHRS26: s26 reset done eth1 up eth0, eth1 Autobooting in 1 seconds ## Booting image at 9f020000. Uncompressing Kernel Image. Error: Bad gzipped data GUNZIP ERROR - must RESET board to recover Resetting. I just want to go back to original firmware.or working openwrt. I can get coms and upload firmware fine to router via wan port and uboot/tftp server method.
But what ever firmware i try i get the above. This is route i follow in serial console setenv serverip 192.168.1.45; setenv ipaddr 192.168.1.99 tftp 0x80800000 orig.bin erase 0x9f020000 +0x3c0000 cp.b 0x80000000 0x9f020000 bootm 0x9f020000 after this i get above result. I think im close,i might be missing something Any help pls. I bricked a Wr741nd today and brought it back - the only firmware that works is the 10.0.3.1 RC3, anything else fails after you change the router IP address. I have also managed OpenVPN, installing the Luci openVPN package seemed to install it when the actual package failed. Anyway, here's how I brought it back: 1. Restart router, when Sys light comes on, hold front reset/QSS button for 3 seconds until SYS light starts flashing very quickly.
At this point connect computer directly to port 1 on router. Give computer static ip of 192.168.1.155. Restart networking on computer. Run: telnet 192.168.1.1 -l root Run ‘firstboot’ Run ’sync’ Run ‘passwd’ to reset root password. Fix computer networking and restart the router. Then scp will work or ssh - I used winscp to make it easy, drag and drop:.Login as root via ssh or use winscp.Check memory usage with the free or top commands; the image can be up to 8MB, so only proceed if you have as much free RAM as the image size plus 6-8MB - I had no problem after:.An easy way to free up some RAM is to delete the symlinks to /etc/modules.d/20-mac80211 and /etc/modules.d/27-ath9k and reboot. Drop caches can be useful too: root@OpenWrt:/# echo 3 /proc/sys/vm/dropcaches.wget or scp (easy drag and drop with winscp) the new firmware build to /tmp.And finally, using the winscp command box: root@OpenWrt:/# mtd -r write /tmp/openwrt-ar71xx-tl-wr741nd-v1-squashfs-factory.bin firmware The factory firmware seems to work better, use RC3 only - earlier had no wifi, trunk failed completely, sysupgrades had problems or missing items.
![]()
None of them have anything other than wifi 1-11 (12-14 won't work). Hi, I got to my hands bricked WR741 v4.3.
It went wrong when upgrading stock firmware. I read a lot in wiki and forum and just want to make some thinks 100% sure. I will solder (already started but my soldering iron broke before finish) headers to pins according to info in wiki. I ordered before (but newer use so far) this USBTTL convertor To be sure if I will connect it GND-GND, VCC-3,3, TX-RX, RX-TX (or RX,TX switched) won't I burn the serial circuit?
Does anyone any experience with this convenrter? Will use TFTP recovery and assume I should use.-factory.bin image (device never flashed with non stock firmware). What is general difference between.-factory.bin and.-sysupgrade.bin images? Thanks for answers.
Comments are closed.
|
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |