PolyPoint is a system for using ultra-wideband RF time-of-flight ranging to perform indoor localization. It incorporates the DecaWave DW1000 for UWB packet transmission and timestamping into a solder-on module that provides node-to-node ranges over an I2C interface.

The name PolyPoint comes from the use of many polygons and shapes in the prototype design and the desire to pinpoint where users are with the system.

When cloning this repository, be absolutely sure to do

git clone --recursive https://github.com/lab11/polypoint.git

so that you get the submodules as well. All of the supporting libraries and build tools are in submodules for the various hardware platforms used in this project.

The PolyPoint system is composed of several hardware pieces. At the core is the TriPoint module which is a 1.25" on a side triangle that encompasses all of the core ranging hardware and software. TriPoint has castellated edges and can be soldered on to a carrier board, effectively as a ranging IC. TriTag is one such carrier board designed to be the tag in the ranging system. It includes the UWB antennas and a Bluetooth Low Energy radio plus a battery charging circuit. TriTag is able to provide ranges to a mobile phone application.

TriPoint includes the following components:

• DecaWave DW1000 UWB radio
• STM32F031G6U6 MCU
• RF switch

The MCU contains all the necessary code to run the DW1000 and the ranging protocol.

TriTag includes:

• The TriPoint module
• 3 UWB antennas
• nRF51822 BLE radio
• 3.3 V LDO
• Li-ion battery charger

TriTag is designed to be the tag to be localized in the system and connected to a smartphone.

The TriPoint software is located in /tripoint/firmware. The TriTag code is in /nrf51822/apps/tritag. Instructions for building each are located in their respective folders.