Hi, I'm building a peripheral app with SDK11 and a nRF52 microcontroller (softdevice 2.0.0). When connection parameters are set in ble_conn_params_init, this always leads to a NRF_ERROR_INVALID_PARAM even though parameters seem OK.
#define APP_TIMER_PRESCALER 0
#define APP_TIMER_OP_QUEUE_SIZE 4
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS)
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS)
#define SLAVE_LATENCY 0
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER)
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000, APP_TIMER_PRESCALER)
#define MAX_CONN_PARAMS_UPDATE_COUNT 3
.
uint32_t err_code;
ble_conn_params_init_t cp_init;
memset(&cp_init, 0, sizeof(cp_init));
ble_gap_conn_params_t conn_params;
memset(&conn_params, 0, sizeof(conn_params));
conn_params.min_conn_interval = MIN_CONN_INTERVAL;
conn_params.max_conn_interval = MAX_CONN_INTERVAL;
conn_params.slave_latency = SLAVE_LATENCY;
conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
cp_init.p_conn_params = &conn_params;
cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
cp_init.disconnect_on_fail = false;
cp_init.evt_handler = on_conn_params_evt;
cp_init.error_handler = conn_params_error_handler;
err_code = ble_conn_params_init(&cp_init);
APP_ERROR_CHECK(err_code);
No errors when cp_init.p_conn_params = NULL. There is no example in SDK where p_conn_params isn't NULL.
Do you have any idea about why softdevice rejects it ?
Joris
