Whats the minimal time required to advertise, connect and transfer the smallest packet using BLE Beacons?

[Al]

Thanks for your help עוטד. I want to use BLE / beacon technology in order to track items that pass-by in high-speed and close proximity (0.5m). This means I only have a few ms (1-100) in order to track the device. It is a set of devices that are already paired. Can BLE support such use case?

[Petter Myhre]

The minimum advertising interval is 20 ms, so if the devices are only in range for 1 ms, then it is a a very big chance that the advertisement is missed by the scanner.

Then you have to connect, and exchange the data.

Is 1 ms a hard limit?

[Al]

Hi Peter,

Thanks for your quick answer. 1 ms events are pretty rare. Most of the events will take between 40 and 100 ms. What is the minimum time required to advertise, connect and exchange data? Lets say its a serial number of a few digits. Data exchange is only in one direction.

[Petter Myhre]

I'm not sure. I'll have to test. Which SoftDevice are you using? Which chipset? Will there be a Nordic chip on both sides of the link? If not what will be the other device? Will the advertiser be stationary? And the scanner be passing by? Or vice versa?

[Al]

I'm currently exploring this option and hence not limited to predefined HW. Both Advertiser and scanner won't be stationary - it's actually people :)

[Al]

Hi Peter,

Do you plan on testing this? :)