The DWM1004C is a TDoA Tag module. The diagram in the Product Brief depicts a complete TDoA system that includes Anchors, Tags (DWM1004C), Ethernet Hub and a PC running the Central location engine.
With the Decawave DWM1004C offering we are providing customers a low cost TDoA tag for their TDoA systems.
DWM1004-ES allows easy development of software for the DWM1004C module. The carrier board has a Segger J-Link OBfor example that supports SWD debug, flash programming and also a VCOM port.
Software and documents are all on this page - https://www.decawave.com/product/dwm1004-module/
DWM1004C Mass production is planned for Q4/19