How can I know that it's scanning or not?

[roger.k]

Hi. I'm using nRF51822AC, SDK12.2.0 as Central.

Q1. Is there any function to know regarding it is scanning or not?

Q2. As your example "ble_app_multilink_central", Does "Scan" stop automatically after "sd_ble_gap_connect"?

Q3. Why do you use "(void) sd_ble_gap_scan_stop();" in "scan_start" function?

I hope your reply.

[Roger Clark]

1. No. I don't think this exists. Use an application timer with the same duration as the scan.
2. Yes. According to the other examples. Scan stops automatically when you connect succesfully
3. Stop scan is sometimes called in start_scan function so that you can call start_scan and not get an error if its already scanning

[roger.k]

Thanks for your help. about Q3. I'm using scan_start function as below.

void scan_start(void) { ret_code_t err_code;

	(void) sd_ble_gap_scan_stop();

	err_code = sd_ble_gap_scan_start(&m_scan_params);
	APP_ERROR_CHECK(err_code);

}

Sometimes it makes an error and reboot system. Error code is 0x08. What could be the problem?

I hope your reply.

[Roger Clark]

Why are you casting the return value from sd_ble_gap_scan_stop() to void

Also, I'd check that sd_ble_gap_scan() stop returns a valid response before continuing

Error code 0x08 is

#define 	NRF_ERROR_INVALID_STATE   (NRF_ERROR_BASE_NUM + 8)
 	Invalid state, operation disallowed in this state.

[roger.k]

Thank you very much for your help.

[Roger Clark]

No worries.

Good luck with your project.