RE: Bluetooth trilateration using nRF5340

Simonr — Tue, 25 Jul 2023 11:56:32 GMT

Hi Theodor

Yes, this is possible, but maybe the Direction Finding feature in BLE might be more like what you're looking for. We have some samples for a connectionless locator and beacon where you should also be able to add I.E. the heart rate service to the beacon so that the locators can first locate the device and afterwards pick up on the heart rate of said beacon (or vise versa). Note that you will also need 2 or 3 locators here as well to get it down to being very accurate, but with this it should be possible to get down to single cm accuracy.

Connectionless beacon: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/direction_finding_connectionless_tx/README.html

Connectionless locator: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/direction_finding_connectionless_rx/README.html

If not, the nRF DM sample will likely work as well, but we don't have any samples where centrals triangulate the position of one device with this setup. You will have to do the calculations on your own.

Best regards,

Simon