What defines the RSSI update rate for nRF51 devices?

RE: What defines the RSSI update rate for nRF51 devices?

run_ar — Tue, 03 Jan 2017 07:51:48 GMT

The central will normally choose a connection intervall close to the max value. To see the exact paramters use a sniffer to capture an airtrace or check the ble_gap_evt_conn_param_update event as shown in this chart.

RE: What defines the RSSI update rate for nRF51 devices?

eeboarder — Mon, 02 Jan 2017 17:52:17 GMT

run_ar, I would prefer to poll the RSSI value at a fixed rate rather than use the sd_ble_gap_rssi_start() threshold event reporting, if possible.

The defines in my main.c file show the connection intervals as:

#define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Determines minimum connection interval in millisecond. */
#define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Determines maximum connection interval in millisecond. */

Does this set the connection interval between 20 and 75 ms?

RE: What defines the RSSI update rate for nRF51 devices?

run_ar — Mon, 02 Jan 2017 12:33:59 GMT

sd_ble_gap_rssi_get will give you the RSSI value of the previous connection event. What is your connection interval in this case. Note that you could call sd_ble_gap_rssi_start with a low threshold to get an event when the RSSI value changes more than the threshold.