Using Wi-Fi for client-based indoor positioning can be beneficial because in many cases existing infrastructure can be used. This could be for example Wi-Fi enabled cash register systems, routers and client hot spots. It is not even necessary that the devices are connected with the access points to determine their position. Accuracy is between 5-15 meters – with an accuracy of up to 50 cm, beacons perform better.
Client-based Wi-Fi positioning is not possible on iOS devices
Devices running on iOS 4.3 and higher do not support client-based positioning via Wi-Fi. Relying exclusively on Wi-Fi would mean that a lot of devices are excluded. Exclusively using Wi-Fi as a positioning technology can only make sense when the operator offers his own (Android-) devices, for example visitor guides in museums or smartphones for employees. If this is not the case, beacons (iBeacon/Eddystone) are the better choice.
Server-based positioning using special hardware
With server-based positioning using Wi-Fi, it is possible to detect all devices – but special hardware is required (for example infsoft Locator Nodes or Cisco MSE, Meraki, Xirrus).