I need to create a WiFi network(or other types e.g. LoRa) for IoT devices, inside a building. The Building has three floors, each about 250 square meters.
The main constraint is that I can't use any cables, I can use only one AP. I read about WiFi 900MHz (802.11ah) which look like a perfect solution but I can't find any device in such standard. I add that I want to connect about 30 IoT devices and I want to send about 100 kbps from each device to the AP.
Is it possible to make such network using WiFi 802.11b using the most powerful router (in case of signal strength) with an outdoor antenna with e.g. 10dB?
I'm afraid that LoRa's bandwidth will be the bottleneck. I'm looking for some other ideas.