RTLS requires precise anchors coordinates placement within the software. Therefore you need to measure them precisely - ideally in cm resolution.
You can use several tools for that:
- Laser measurement tool, you get ranges.
- Total station is able to provide you the X,Y and Z coordinates of the anchors (external link).
- Auto-anchors deployment - auto-measurement during the initialization. This is the fastest approach currently in beta stage - limited to small number of anchors. It will not provide highest possible accuracy delivered by laser tools. It is designed for demos or venues with clear line of sight conditions.
Setting Anchor's the Coordinates
The measured coordinates need to be inserted into the anchors’ settings within Sensmap. In Sensmap, go to RTLS -> Nodes and click the corresponding “Edit” button. Then you can type the coordinates.
When you cannot see the axis origin, mainly in larger installation, you can use Sensmap’s “Measures” tool to correctly place the anchors. To measure a distance, click on Measures -> Measure Distance and then add a Marker on the map.
You can use a wall as a reference point for example, as is shown in picture bellow. By using the laser measurement tool, the distance to both walls can be measured. Then two markers can be placed on each wall and by using the drag-and-drop feature, you can easily adjust the anchor’s position.
The offset of the position in Sensmap should not be greater than 10 cm from the real position.
It is also highly recommended to use the alias feature when deploying the anchors. This feature enables you to rename any node (anchor or tag) to a custom name. This will make the installation more clear, than using only the anchors’ MAC addresses.
We recommend to write down note the MAC/Alias of the anchor that you have just placed or put them directly into Sensmap . Once all of them are in place, it is very hard to tell which anchor is which, especially if they are mounted high above the floor. With anchor 1.4 and higher, you can also use LED for anchor identification.