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--- doc:appunti:hardware:tl-wr741nd [2014/02/23 22:56] – created niccolo
+++ doc:appunti:hardware:tl-wr741nd [2021/02/26 10:22] (current) – [TP-LINK TL-WR741ND] niccolo
@@ Line 1: / Line 1: @@
 ====== TP-LINK TL-WR741ND ======
-Wireless router with detachable antenna, upgradable with OpenWrt. Follow the instructions on the [[http://wiki.openwrt.org/toh/tp-link/tl-wr741nd|OpenWrt wiki]].
+Wireless router with detachable antenna, upgradable with OpenWrt. Follow the instructions on the [[http://wiki.openwrt.org/toh/tp-link/tl-wr741nd|OpenWrt wiki]]. My model is V.4.22, purchased in Italy.
-This is the recipe for installing OpenWrt from trunk (BARRIER BREAKER, Bleeding Edge, r39638):
+{{:doc:appunti:hardware:tplink:tl-wr741nd-01.jpg?300|TP-LINK TL-WR741ND}}
-  - Factory reset the router
+^ CPU                     | Atheros AR9330  |
-  - Download the [[http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-wr741nd-v4-squashfs-factory.bin|*-factory.bin]] firmware image.
+^ RAM                     | 32 Mb           |
-  - Use the original web-based procedure to upgrade the firmware, upload the above image.
+^ Flash                   | 4 Mb            |
-  - Connect with telenet 192.168.1.1 and set the root password.
+^ Default login/password  | admin/admin     |
-  - Connect with ssh root@192.168.1.1
+^ OpenWrt version tested  | 14.07 (Barrier Breaker) Bleeding Edge, r39638  |
+  * [[http://wiki.openwrt.org/toh/tp-link/tl-wr741nd|OpenWrt wiki]]
+  * [[http://downloads.openwrt.org/snapshots/trunk/ar71xx/|Download OpenWrt for ar71xx Trunk]]
+===== First OpenWrt installation =====
+This is the recipe to install OpenWrt, I used trunk (BARRIER BREAKER, Bleeding Edge, r39638):
+  - Reset the router to the factory defaults.
+  - Download the [[http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-wr741nd-v4-squashfs-factory.bin|*-factory.bin]] firmware image to a networked PC.
+  - Connecto to ''http://192.168.0.1/'', login with //admin// //admin// and use the web-based procedure to upgrade the firmware, uploading the above image.
+  - Connect with ''telenet 192.168.1.1'' and set the root password.
+  - Connect with ''ssh root@192.168.1.1''
+===== OpenWrt upgrade =====
+  - Download the [[http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-wr741nd-v4-squashfs-sysupgrade.bin|*-sysupgrade.bin]] firmware image into the /tmp directory of the router, rename it as ''tplink.bin''.
+  - Execute ''mtd -r write /tmp/tplink.bin firmware''.
+===== Exploring the system =====
 <code>
-cat /proc/cpuinfo
+# cat /proc/cpuinfo
 system type             : Atheros AR9330 rev 1
 machine                 : TP-LINK TL-WR741ND v4
@@ Line 30: / Line 49: @@
 VCED exceptions         : not available
 VCEI exceptions         : not available
+</code>
 <code>
+# free
+             total         used         free       shared      buffers
+Mem:         28908        27632         1276            0         1716
+-/+ buffers:              25916         2992
+Swap:            0            0            0
+</code>
+<code>
+# cat /proc/mtd
+dev:    size   erasesize  name
+mtd0: 00020000 00010000 "u-boot"
+mtd1: 00104e2c 00010000 "kernel"
+mtd2: 002cb1d4 00010000 "rootfs"
+mtd3: 00100000 00010000 "rootfs_data"
+mtd4: 00010000 00010000 "art"
+mtd5: 003d0000 00010000 "firmware"
+</code>
+We need OpenVPN and some other extra packages. Due low flash space we opted for libpolarssl SSL implementation, there is not enough space for the LuCI web interface:
+  * coreutils, coreutils-base64
+  * etherwake, wol
+  * kmod-tun, libbz2, liblzo, libpolarssl, openvpn-polarssl, zlib
+  * libpcap, tcpdump-mini
+This is the **free space (84 kb)** after installing them:
+<code>
+# df -h
+Filesystem                Size      Used Available Use% Mounted on
+rootfs                    1.0M    940.0K     84.0K  92% /
+/dev/root                 1.8M      1.8M         0 100% /rom
+tmpfs                    14.1M     64.0K     14.1M   0% /tmp
+/dev/mtdblock3            1.0M    940.0K     84.0K  92% /overlay
+overlayfs:/overlay        1.0M    940.0K     84.0K  92% /
+tmpfs                   512.0K         0    512.0K   0% /dev
+</code>
+Some interesting lines from **''dmesg''**:
+<code>
+Memory: 28644k/32768k available (2325k kernel code, 4124k reserved, 607k data, 264k init, 0k highmem)
+ar933x-uart: ttyATH0 at MMIO 0x18020000 (irq = 11) is a AR933X UART
+console [ttyATH0] enabled, bootconsole disabled
+m25p80 spi0.0: en25q32b (4096 Kbytes)
+tp-link partitions found on MTD device spi0.0
+ag71xx-mdio.1: Found an AR7240/AR9330 built-in switch
+eth0: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
+ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd041, driver=Generic PHY]
+eth1: Atheros AG71xx at 0xb9000000, irq 4, mode:MII
+</code>