I would appreciate your advise on selecting good model of Atheros-based router for running OpenWrt.
Preferably - 802.11n, having external detachable antenna is a plus.
I volunteered recently to install Wi-Fi network in my child's school.
I found in the school that room where they have Ethernet cable with Internet connection has enormously thick concrete walls - about 80cm!
Signal from my ASUS-WL500G (standard antenna) which I used for testing degrades significantly after that wall, and 10m after it comes almost to zero.
Notebook which I used has built-in Ralink (RT2500) adapter, with driver dated year 2004, so part of weakness can be this adapter itself.
Ok, I would install antenna with extra gain on central router (my guess is Linksys WRT-160NL so far) which would be connected to wired Ethernet.
There are some sticks which have 4dBi antenna.
I just bought TP-Link TL-WN722N (150Mbit, 11n) Wireless USB stick with External 4dBi antenna
http://www.tp-link.com/products/product … =TL-WN722N
Test at home (via not very thick 2 concrete walls, from hall to kitchen) confirmed that wireless signal significantly improved, if I compare this USB stick to built-in Ralink RT2500.
Than I installed on ASUS WL-500G (54Mbit 11g) external antenna - TP-Link TL-ANT2406A 6dBi
http://www.tp-link.com/products/product … L-ANT2406A
Built-in Ralink adapter on notebook is now capable to work from kitchen at 48Mbps-54Mbps (via 2 concrete walls).
And of course connection via TL-WN722N just flies.
So far, client-side solution seems to work fine.
Now I plan to re-test and see if it works in the school.
In addition to central router I would probably need 2-3 more which should not cost a lot.
As signal still can be too weak in some remote classes, possibility to change antenna to more powerful is certainly a plus.
Those routers would work as "range extenders" (wireless client) or in WDS, and with computer(s) connected to LAN ports.