Hi,
your understanding is correct. In order to setup a minimal RTLS system and getting the data on the Server you need:
- 4 Anchors
- 1 Tag
- 1 Gateway - which consists of a Raspberry PI and DWM1001-DEV
So in total 6 DWM1001-DEV.
Listener is a mode which allows you to display positions of multiple Tags via Listener’s shell or via its BLE. It was introduced in the Release 1 which did not have Gateway function. The Gateway function is a more complete server solution which was introduced in the Release 2:
https://mailchi.mp/2e29a06be75f/728wi51rzu?e=[UNIQID]
Location and IoT data are collected by the Gateway via UWB. See this post for more details:
You can configure any DWM1001 with PANS to the Listener mode, the same as Tag or Anchor. If Gateway function is used, the control over the DWM1001 is done by DWM Linux Kernel Module, DWM Daemon and DWM Proxy. You need to use MQTT interface in that case.
What you can do is to purchase 6 modules. Setup first the 4 Anchors, 1 Tag and 1 Listener network (without Raspberry/Gateway function). Test it with the DRTLS Android Manager. Then plug the Listener to the Raspberry and turn it into a Gateway.
In the first phase the DWM1001 were shipped with PANS Release 1 which were not certified. Then certified DWM1001C modules were shipped and then PANS Release 2 was introduced. In general if you use PANS Release 2 it should be FCC/ETSI certified for both DWM1001 and DWM1001C. But better check it with Decawave.
Cheers,
TDK