If you have a Sony BRAVIA HDTV without a built-in wireless adapter, you may have checked out the Sony wireless adapter UWA-BR100. This wireless adapter is too expensive but we are left with no other options if we want the wireless capability because BRAVIA does not recognize other wireless adapters.
How can a router be an alternative of a wireless adapter? Please read my story and see if it fits your situation. (Disclaimer: as my system may not be identical to yours, the following information may cost you a risk of $20 or more and hours of your precious time. Use with your own discretion.)
My Sony BRAVIA TV has also a LAN (RJ-45) port which enables the wired connection. It allows me to connect the TV wiredly to a wireless bridge. The wireless bridge can then replace the wireless adapter to relay the data from/to the wireless router. After some research, I found out there are many cheap routers that can be used as a wireless bridge with a third party firmware from DD-WRT. TP-Link TL-WR740N router is one of them in the DD-WRT supported devices list. It is a $20+ cheap router and almost all versions (v1.x to v4.x) are supported by DD-WRT (version 5.x is not supported but it seems that this version is only available in China.) (Note: besides the Model, the hardware revision is also very important when checking the list of the supported devices.)
I decided to go with TL-WR740N + DD-WRT solution.
When I was reading the manual of the TL-WR740N router, I found it has the WDS Bridging capability. It is a big bonus from this cheap router. After all, I did not need to flash its firmware to get what I wanted. Now I am connecting the Sony TV to internet with these simple steps:
(Note: The modem from my ISP has a built-in wireless Access Point.)
1. Start a browser and login to the modem's (or the primary router's) configuration page. Mark down the IP, MAC and DHCP range of the modem's Access Point.
2. If the modem's AP (Access Point) is using Auto channel, change it to a fixed channel. (See this post for the consideration of selecting a channel.)
3. Power on the TL-WR740N router. Disable the wireless on the computer and connect the computer to the TL-WR740N router with an Ethernet cable.
4. Start a browser and input http://192.168.0.1 in the browser's location bar and press Enter. Login to the TL-WR740N router and change the password.
5. In TL-WR740N router's menu, go to Wireless | Wireless Settings. Uncheck "Enable SSID Broadcast" and check "Enable WDS Bridging". Fill in the information from the modem's AP (alternatively, we can press the Survey button to let the router scan the broadcasting routers and select the one we want to connect. The information will be automatically filled and we will only need to input the Password). The BSSID is filled with the MAC of the modem's AP.
6. Go to menu DHCP | DHCP Settings. Disable DHCP Server. This allows the clients (the Sony TV or computers that are connecting to the TL-WR740N router) get their IP's from the modem's AP.
7. By default, TL-WR740N disables wireless security. We want to turn it on by going to the menu Wireless | Wireless Security.
8. Go to menu Network | LAN, change the IP to a new and fixed one that is in the same subnet of the modem's AP and outside the DHCP range of the modem's AP.
9. Reboot the router... The computer is now connected to the internet through the TL-WR740N router.
10. Connect the Sony TV to the TL-WR740N router with an Ethernet cable. Set up the wired connection on the TV and enjoy the content from internet.