I'm running my R-Pi as an IoT server at the office, where it connects to the internet modem both via LAN and WiFi (just to be sure it'll work no matter what) on the network 192.168.0.0, and it connects to the IoT stations (ESP8266s) via WiFi (the R-Pi acts as an AP using a virtual interface, as discused here) using network 10.0.0.0. Everything works fine and we're all happy at the office, but now we need to install this system on the whole building, and clearly the R-Pi as AP is not powerfull enough. So we want to use the building's APs to extend this network, but I haven't the faintest idea how to do it.
So the question would be, how can I extend the range of the network generated by a R-Pi as AP using aditional APs? We're using D-Link APs managed by a CWM server.