sd_ble_gap_connect: NRF_ERROR_INVALID_PARAM

[fatih]

Hello,

I'm trying to use `sd_ble_gap_connect` to connect to a peer I discovered using `nrf_ble_scan`.

nrf_ble_scan_init_t scan_init{};

scan_init.p_scan_param = &m_scan_param;

scan_init.conn_cfg_tag = 1;

nrf_ble_scan_init(&m_scan, &scan_init, scan_handler);

nrf_ble_scan_start(&m_scan);

Once I find a suitable peer, I do the following to connect to it:

nrf_ble_scan_stop();

res = sd_ble_gap_connect(&buf[last_seen].peer_addr,

&m_scan.scan_params,

&m_scan.conn_params,

m_scan.conn_cfg_tag);

if (res != NRF_SUCCESS) {

printf("sd_ble_gap_connect failed %s", nrf_strerror_get(res));

}

However, I always get 0x7 (invalid param) as my result. I checked my config and I have 5 central links configured. I tried passing NULL as the scan_params and conn_params to scan_init to use the default ones, but that did not help either.

Is there anything obvious that I'm missing?

[Simonr]

What are the values of the NRF_BLE_SCAN_SCAN_INTERVAL, NRF_BLE_SCAN_SCAN_WINDOW, and NRF_BLE_SCAN_SCAN_DURATION here?

Also, I'm interested in why you seem to be using your own custom version of the scan and connect functions. I would strongly recommend using something similar to the ble_app_hrs_c for instance where the nrf_ble_scan_connect_with_target() functions takes care of all these steps for you. Identity lists should not be necessary to use for BLE, so I don't think you should focus on that.

Best regards,

Simon

[fatih]

#define NRF_BLE_SCAN_SCAN_INTERVAL 10

#define NRF_BLE_SCAN_SCAN_DURATION 0

#define NRF_BLE_SCAN_SCAN_WINDOW 20

These are the values I have right now. I did not use nrf_ble_scan_connect_with_target as it seems to do exactly what I'm doing here. But I'm absolutely using the scan functionality, just not the connect one.