RE: distance measurement with RSSI in nrf52 and android device.

awneil — Wed, 30 Mar 2016 19:37:35 GMT

There is no simple, straightforward formula to directly calculate distance from RSSI.

The best you can hope for is really just a very rough indication of "near" or "far".

RE: distance measurement with RSSI in nrf52 and android device.

FormerMember — Wed, 30 Mar 2016 13:51:24 GMT

When using S132, you can use sd_ble_gap_rssi_get(..) to get the RSSI for the last connection event. Using sd_ble_gap_rssi_get(..) requires that you first have started RSSI reporting using sd_ble_gap_rssi_start(..).

sd_ble_gap_rssi_start(..) will initiate "continuous" RSSI update when the RSSI changes, through the event BLE_GAP_EVT_RSSI_CHANGED, see this message sequence chart.