Calculate accurate distance between 2 nrf52832 devices using proximity model

RE: Calculate accurate distance between 2 nrf52832 devices using proximity model

Sigurd — Tue, 28 May 2019 14:10:38 GMT

Any of the BLE examples can give you the RSSI. There is no examples that calculates the distance. There are several theoretical formulas (you can find a simple formula here) you can use to calculate the RSSI value into meters, but in practice the RSSI signal is too unreliable for any accurate distance measuring. There will always be too many variables affecting the measured RSSI, like radio interference, signal multi-path/reflections,etc

RE: Calculate accurate distance between 2 nrf52832 devices using proximity model

ani — Mon, 27 May 2019 12:00:03 GMT

Hello,

Is there any way to calculate the distance?

RE: Calculate accurate distance between 2 nrf52832 devices using proximity model

Sigurd — Mon, 27 May 2019 08:18:02 GMT

Hi,

RSSI is only going to give you a very broad "near" or "far" estimate. It will not give you accurate distance. Maybe +-5 meter. That said, the new nRF52811 SoC has direction finding capability, but the software for that is not ready yet.