What has to be installed in the building?

That depends on your specific needs: for the routing function, you do not need any equipment in the building. However, there is of course the option to deploy a stationary touchscreen terminal which can show the map of the area. In order to allow guests manual positioning, tags with QR codes and/or NFC chips can be mounted e.g. on wayfinding signs. Users can scan these tags and easily determine their current position. If a continuous and automatic indoor positioning is wished for, Bluetooth beacons must be installed in the building. Additionally, the contagt solution can use the already existing WiFi intrastructure in buildings for positioning (but this is not mandatory).