open-source-ultra-wideband-rtls-with-zephyr-development-experience.pdf

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1、#EMBEDDEDOSSUMMITOpen Source Ultra-Wideband RTLS with Zephyr Developent ExperienceAleksander Wjtowicz,AVSystem Aleksander Wjtowicz vooytovitch https:/ Fresh CS graduate AGH UST,Krakw Embedded Software Engineer AVSystem we do IoT device management,based on LwM2M I work on Anjay,our LwM2M client and i

2、ts ports,including ZephyrAbout me I didnt know about Zephyr before joining AVSystem It was also the very first thing I worked on!About me what are Real Time Locating Systems?whats Ultra-Wideband?how UWB-based RTLSs work?project showcase implementation details and my experience with Zephyr how it hel

3、ps with quick development?how it helps with making generic software?problems Ive encountered many tips&tricksTalk plan#EMBEDDEDOSSUMMITReal Time Locating Systems andUltra-Wideband real time asset tracking vehicles,tools,workforce location data is loggedto some service indoor setting cant use GPS tra

4、ckersWhat are RTLSs forIn practiceIn practice various methods RSSI-based is the most popular array of“anchors”around the area“tag”on moving object stronger signal-closer you are to anchor multiple measurements-location estimationIn practicepros:cheap trackers works indoorscons:RSSI changes due to ma

5、ny factors,not just distance that 1 m accuracy may be still not good enoughSignal strength with Bluetooth/Wi-Fi yet another radio technology recent growth of use in consumer electronics since 2007,also a PHY in IEEE 802.15.4 merged to main spec in 2011 unique physical properties for accurate distanc

6、e measurement works in non-line-of-sight scenarios this can be used to build an accurate RTLSWhats Ultra-Wideband?Apple AirTagPhoto:ApplePhoto:AppleBMW Digital Key PlusPhoto:https:/ to 10 GHz,bandwidth:=500 MHz(!)high RX time measurement resolution+multipath detectiontime of flight calculationdistan