Possibly Use a General Firmware Replacement
General-use, after-market firmware projects, such as DD-WRT and Sveasoft, also have hotspot features. For example, DD-WRT supports Chillispot, NoCatSplash, and Sputnik. These replacement firmwares also provide numerous other advanced features that can come in handy, such as a site survey tool to see details on nearby networks, QoS settings to manage traffic, and virtual LANs and multiple SSIDs to segregate the private and public access.