jmuthialu/UWB-Hands-Free

UWB-based precision ranging

Introduction

Refer to my medium post for complete details and demo video:

https://medium.com/@JayMuthialu/uwb-based-hands-free-technology-basics-to-advanced-part-2-612f3b5d7fb8

Video Demo

UWBRanging.mp4

How does this work?

1 - Establish BLE data link

• Scan for peripherals and connect to UWB using its UDID. This is advertised by the beacon.
• Connect to this peripheral and set notification for tx Characterisrics.
• Publish accessoryReadyPublisher event.

2 - Establish connection with UWB

• Subscriber to accessoryReadyPublisher will send initialize command to accessory.
• Accessory sends configuration data and sends accessoryConfigurationData command.
• Device (iPhone) receives config data and creates NISession.
• Runs NISession with accessoryConfigurationData and this generates shared config data.
• Send shared config data in delegate method didGenerateShareableConfigurationData.
• On receipt of shared config data, accessory will update its configuration.
• Accessory starts sending distance information to device.
• Device gets the distance through delegete method didUpdate nearbyObjects.