polypoint

PolyPoint
=========

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.

<p align="center">
  <img src="https://raw.githubusercontent.com/lab11/polypoint/master/media/tritag_blue_1000x889.jpg" alt="TriTag" width="50%;">
</p>

Name
----

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.


Git Clone
---------

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.


Hardware
--------

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

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

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.

Software
--------

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.