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Which sensor or combination of sensors could most accurately determine proximity of objects in open space over time, and the phones are in hands, pockets or purses while walking, bicycling or driving?

How would you prioritize the accuracy of these sensors from 0-5 meters (and how accurate are they at what ranges)?
- Proximity
- Microphone/sonar/ultrasound
- Light
- Blue tooth (assuming others also had their bluetooth on as well)
- GPS (assuming data sharing with others)
- Accelerometer/gyroscope/barometer (assuming data sharing with others, post-GPS established reference point)
- IP address (assuming data sharing)
(04-17-2020, 01:38 PM)kevac Wrote: [ -> ]Which sensor or combination of sensors could most accurately determine proximity of objects in open space over time, and the phones are in hands, pockets or purses while walking, bicycling or driving?

How would you prioritize the accuracy of these sensors from 0-5 meters (and how accurate are they at what ranges)?
- Proximity
- Microphone/sonar/ultrasound
- Light
- Blue tooth (assuming others also had their bluetooth on as well)
- GPS (assuming data sharing with others)
- Accelerometer/gyroscope/barometer (assuming data sharing with others, post-GPS established reference point)
- IP address (assuming data sharing)

Hi!

I notice that you got no answers here. Maybe you got lucky somewhere else and can share that here?

You posted in April – is social distancing possibly the reason for your interest?
Dear Jan and kevac,

time has apparently told that it is bluetooth. phyphox is also using it for quite a long time to identify the nearest external bluetooth sensors.

Once UWB (ultra-wideband) gets more established (Apple has included its corresponding U1 chip in most of its recent devices), this would prospectively be the way to go…